Add Markdown diagrams and render hooks for code blocks

You can now create custom hook templates for code blocks, either one for all (`render-codeblock.html`) or for a given code language (e.g. `render-codeblock-go.html`).

We also used this new hook to add support for diagrams in Hugo:

* Goat (Go ASCII Tool) is built-in and enabled by default; just create a fenced code block with the language `goat` and start draw your Ascii diagrams.
* Another popular alternative for diagrams in Markdown, Mermaid (supported by GitHub), can also be implemented with a simple template. See the Hugo documentation for more information.

Updates #7765
Closes #9538
Fixes #9553
Fixes #8520
Fixes #6702
Fixes #9558

37 files changed, 328 insertions, 1451 deletions

diff --git a/tpl/cast/init_test.go b/tpl/cast/init_test.go
deleted file mode 100644
index 5eb4a9086..000000000
--- a/tpl/cast/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package cast
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/collections/init_test.go b/tpl/collections/init_test.go
deleted file mode 100644
index 570e58d93..000000000
--- a/tpl/collections/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package collections
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/compare/init.go b/tpl/compare/init.go
index 9aa533f55..f423f615e 100644
--- a/tpl/compare/init.go
+++ b/tpl/compare/init.go
@@ -40,14 +40,14 @@ func init() {
 		ns.AddMethodMapping(ctx.Eq,
 			[]string{"eq"},
 			[][2]string{
-				{`{{ if eq .Section "blog" }}current{{ end }}`, `current`},
+				{`{{ if eq .Section "blog" }}current-section{{ end }}`, `current-section`},
 			},
 		)
 
 		ns.AddMethodMapping(ctx.Ge,
 			[]string{"ge"},
 			[][2]string{
-				{`{{ if ge .Hugo.Version "0.36" }}Reasonable new Hugo version!{{ end }}`, `Reasonable new Hugo version!`},
+				{`{{ if ge hugo.Version "0.80" }}Reasonable new Hugo version!{{ end }}`, `Reasonable new Hugo version!`},
 			},
 		)
 
diff --git a/tpl/compare/init_test.go b/tpl/compare/init_test.go
deleted file mode 100644
index 8698cb5e3..000000000
--- a/tpl/compare/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package compare
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/crypto/init_test.go b/tpl/crypto/init_test.go
deleted file mode 100644
index 1c200d777..000000000
--- a/tpl/crypto/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package crypto
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/data/init_test.go b/tpl/data/init_test.go
deleted file mode 100644
index 631a91b39..000000000
--- a/tpl/data/init_test.go
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package data
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/config"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/langs"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	v := config.New()
-	v.Set("contentDir", "content")
-	langs.LoadLanguageSettings(v, nil)
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(newDeps(v))
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/debug/init_test.go b/tpl/debug/init_test.go
deleted file mode 100644
index 226915b34..000000000
--- a/tpl/debug/init_test.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2020 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package debug
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/common/loggers"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Log: loggers.NewErrorLogger()})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/diagrams/diagrams.go b/tpl/diagrams/diagrams.go
new file mode 100644
index 000000000..1bdbc2a02
--- /dev/null
+++ b/tpl/diagrams/diagrams.go
@@ -0,0 +1,73 @@
+// Copyright 2022 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package diagrams
+
+import (
+	"bytes"
+	"html/template"
+	"io"
+	"strings"
+
+	"github.com/bep/goat"
+	"github.com/gohugoio/hugo/deps"
+	"github.com/spf13/cast"
+)
+
+type SVGDiagram interface {
+	Body() template.HTML
+	SVG() template.HTML
+	Width() int
+	Height() int
+}
+
+type goatDiagram struct {
+	d goat.SVG
+}
+
+func (d goatDiagram) Body() template.HTML {
+	return template.HTML(d.d.Body)
+}
+
+func (d goatDiagram) SVG() template.HTML {
+	return template.HTML(d.d.String())
+}
+
+func (d goatDiagram) Width() int {
+	return d.d.Width
+}
+
+func (d goatDiagram) Height() int {
+	return d.d.Height
+}
+
+type Diagrams struct {
+	d *deps.Deps
+}
+
+func (d *Diagrams) Goat(v interface{}) SVGDiagram {
+	var r io.Reader
+
+	switch vv := v.(type) {
+	case io.Reader:
+		r = vv
+	case []byte:
+		r = bytes.NewReader(vv)
+	default:
+		r = strings.NewReader(cast.ToString(v))
+	}
+
+	return goatDiagram{
+		d: goat.BuildSVG(r),
+	}
+}
diff --git a/tpl/os/init_test.go b/tpl/diagrams/init.go
index 5d756bab2..1a5578837 100644
--- a/tpl/os/init_test.go
+++ b/tpl/diagrams/init.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
+// Copyright 2022 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,32 +11,28 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package os
+package diagrams
 
 import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
 	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
 	"github.com/gohugoio/hugo/tpl/internal"
 )
 
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
+const name = "diagrams"
+
+func init() {
+	f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
+		ctx := &Diagrams{
+			d: d,
+		}
 
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
+		ns := &internal.TemplateFuncsNamespace{
+			Name:    name,
+			Context: func(args ...interface{}) (interface{}, error) { return ctx, nil },
 		}
+
+		return ns
 	}
 
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
+	internal.AddTemplateFuncsNamespace(f)
 }
diff --git a/tpl/encoding/init_test.go b/tpl/encoding/init_test.go
deleted file mode 100644
index 666a4e549..000000000
--- a/tpl/encoding/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package encoding
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/fmt/init_test.go b/tpl/fmt/init_test.go
deleted file mode 100644
index 07b740a73..000000000
--- a/tpl/fmt/init_test.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package fmt
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/common/loggers"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Log: loggers.NewIgnorableLogger(loggers.NewErrorLogger())})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/hugo/init_test.go b/tpl/hugo/init_test.go
deleted file mode 100644
index bc806448e..000000000
--- a/tpl/hugo/init_test.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package hugo
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/resources/page"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-	v := config.New()
-	v.Set("contentDir", "content")
-	s := page.NewDummyHugoSite(v)
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Site: s})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, s.Hugo())
-}
diff --git a/tpl/images/init_test.go b/tpl/images/init_test.go
deleted file mode 100644
index d8d8d7839..000000000
--- a/tpl/images/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package images
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/inflect/init_test.go b/tpl/inflect/init_test.go
deleted file mode 100644
index 38499838c..000000000
--- a/tpl/inflect/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package inflect
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/lang/init_test.go b/tpl/lang/init_test.go
deleted file mode 100644
index e62db95b9..000000000
--- a/tpl/lang/init_test.go
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package lang
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-	"github.com/gohugoio/hugo/langs"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{
-			Language: langs.NewDefaultLanguage(config.New()),
-		})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/math/init_test.go b/tpl/math/init_test.go
deleted file mode 100644
index 9998eaf90..000000000
--- a/tpl/math/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package math
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/os/os.go b/tpl/os/os.go
index 43c42f5e1..8b195a527 100644
--- a/tpl/os/os.go
+++ b/tpl/os/os.go
@@ -19,6 +19,7 @@ import (
 	"errors"
 	"fmt"
 	_os "os"
+	"path/filepath"
 
 	"github.com/gohugoio/hugo/deps"
 	"github.com/spf13/afero"
@@ -27,17 +28,9 @@ import (
 
 // New returns a new instance of the os-namespaced template functions.
 func New(d *deps.Deps) *Namespace {
-	var rfs afero.Fs
-	if d.Fs != nil {
-		rfs = d.Fs.WorkingDir
-		if d.PathSpec != nil && d.PathSpec.BaseFs != nil {
-			rfs = afero.NewReadOnlyFs(afero.NewCopyOnWriteFs(d.PathSpec.BaseFs.Content.Fs, d.Fs.WorkingDir))
-		}
-
-	}
-
 	return &Namespace{
-		readFileFs: rfs,
+		readFileFs: afero.NewReadOnlyFs(afero.NewCopyOnWriteFs(d.PathSpec.BaseFs.Content.Fs, d.PathSpec.BaseFs.Work)),
+		workFs:     d.PathSpec.BaseFs.Work,
 		deps:       d,
 	}
 }
@@ -45,6 +38,7 @@ func New(d *deps.Deps) *Namespace {
 // Namespace provides template functions for the "os" namespace.
 type Namespace struct {
 	readFileFs afero.Fs
+	workFs     afero.Fs
 	deps       *deps.Deps
 }
 
@@ -66,8 +60,9 @@ func (ns *Namespace) Getenv(key interface{}) (string, error) {
 // readFile reads the file named by filename in the given filesystem
 // and returns the contents as a string.
 func readFile(fs afero.Fs, filename string) (string, error) {
-	if filename == "" {
-		return "", errors.New("readFile needs a filename")
+	filename = filepath.Clean(filename)
+	if filename == "" || filename == "." || filename == string(_os.PathSeparator) {
+		return "", errors.New("invalid filename")
 	}
 
 	b, err := afero.ReadFile(fs, filename)
@@ -101,7 +96,7 @@ func (ns *Namespace) ReadDir(i interface{}) ([]_os.FileInfo, error) {
 		return nil, err
 	}
 
-	list, err := afero.ReadDir(ns.deps.Fs.WorkingDir, path)
+	list, err := afero.ReadDir(ns.workFs, path)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read directory %q: %s", path, err)
 	}
diff --git a/tpl/os/os_test.go b/tpl/os/os_test.go
index bbc0d018c..59491e97c 100644
--- a/tpl/os/os_test.go
+++ b/tpl/os/os_test.go
@@ -11,34 +11,26 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package os
+package os_test
 
 import (
 	"path/filepath"
 	"testing"
 
-	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/tpl/os"
 
 	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/hugofs"
-	"github.com/spf13/afero"
 )
 
 func TestReadFile(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
-
-	workingDir := "/home/hugo"
 
-	v := config.New()
-	v.Set("workingDir", workingDir)
+	b := newFileTestBuilder(t).Build()
 
-	// f := newTestFuncsterWithViper(v)
-	ns := New(&deps.Deps{Fs: hugofs.NewMem(v)})
+	// helpers.PrintFs(b.H.PathSpec.BaseFs.Work, "", _os.Stdout)
 
-	afero.WriteFile(ns.deps.Fs.Source, filepath.Join(workingDir, "/f/f1.txt"), []byte("f1-content"), 0755)
-	afero.WriteFile(ns.deps.Fs.Source, filepath.Join("/home", "f2.txt"), []byte("f2-content"), 0755)
+	ns := os.New(b.H.Deps)
 
 	for _, test := range []struct {
 		filename string
@@ -53,13 +45,13 @@ func TestReadFile(t *testing.T) {
 
 		result, err := ns.ReadFile(test.filename)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
@@ -67,15 +59,8 @@ func TestFileExists(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	workingDir := "/home/hugo"
-
-	v := config.New()
-	v.Set("workingDir", workingDir)
-
-	ns := New(&deps.Deps{Fs: hugofs.NewMem(v)})
-
-	afero.WriteFile(ns.deps.Fs.Source, filepath.Join(workingDir, "/f/f1.txt"), []byte("f1-content"), 0755)
-	afero.WriteFile(ns.deps.Fs.Source, filepath.Join("/home", "f2.txt"), []byte("f2-content"), 0755)
+	b := newFileTestBuilder(t).Build()
+	ns := os.New(b.H.Deps)
 
 	for _, test := range []struct {
 		filename string
@@ -101,15 +86,8 @@ func TestFileExists(t *testing.T) {
 
 func TestStat(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
-	workingDir := "/home/hugo"
-
-	v := config.New()
-	v.Set("workingDir", workingDir)
-
-	ns := New(&deps.Deps{Fs: hugofs.NewMem(v)})
-
-	afero.WriteFile(ns.deps.Fs.Source, filepath.Join(workingDir, "/f/f1.txt"), []byte("f1-content"), 0755)
+	b := newFileTestBuilder(t).Build()
+	ns := os.New(b.H.Deps)
 
 	for _, test := range []struct {
 		filename string
@@ -123,11 +101,28 @@ func TestStat(t *testing.T) {
 		result, err := ns.Stat(test.filename)
 
 		if test.expect == nil {
-			c.Assert(err, qt.Not(qt.IsNil))
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result.Size(), qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result.Size(), qt.Equals, test.expect)
 	}
 }
+
+func newFileTestBuilder(t *testing.T) *hugolib.IntegrationTestBuilder {
+	files := `
+-- f/f1.txt --
+f1-content
+-- home/f2.txt --
+f2-content
+	`
+
+	return hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			WorkingDir:  "/mywork",
+		},
+	)
+}
diff --git a/tpl/partials/init_test.go b/tpl/partials/init_test.go
deleted file mode 100644
index b18ac0a00..000000000
--- a/tpl/partials/init_test.go
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package partials
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/common/loggers"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{
-			BuildStartListeners: &deps.Listeners{},
-			Log:                 loggers.NewErrorLogger(),
-		})
-		if ns.Name == namespaceName {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/path/init_test.go b/tpl/path/init_test.go
deleted file mode 100644
index 2282c3305..000000000
--- a/tpl/path/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package path
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/reflect/init_test.go b/tpl/reflect/init_test.go
deleted file mode 100644
index 2ad33fc25..000000000
--- a/tpl/reflect/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package reflect
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/common/loggers"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Log: loggers.NewErrorLogger()})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/safe/init_test.go b/tpl/safe/init_test.go
deleted file mode 100644
index 7aa1473d2..000000000
--- a/tpl/safe/init_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package safe
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/site/init_test.go b/tpl/site/init_test.go
deleted file mode 100644
index 46af2ef5b..000000000
--- a/tpl/site/init_test.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package site
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/resources/page"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-	v := config.New()
-	v.Set("contentDir", "content")
-	s := page.NewDummyHugoSite(v)
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Site: s})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, s)
-}
diff --git a/tpl/strings/init_test.go b/tpl/strings/init_test.go
deleted file mode 100644
index 39d928601..000000000
--- a/tpl/strings/init_test.go
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package strings
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Cfg: config.New()})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/templates/init_test.go b/tpl/templates/init_test.go
deleted file mode 100644
index ada53b185..000000000
--- a/tpl/templates/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package templates
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/time/init_test.go b/tpl/time/init_test.go
deleted file mode 100644
index d7efabfa7..000000000
--- a/tpl/time/init_test.go
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package time
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-	"github.com/gohugoio/hugo/langs"
-
-	"github.com/gohugoio/hugo/htesting/hqt"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{
-			Language: langs.NewDefaultLanguage(config.New()),
-		})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/tplimpl/embedded/templates/_default/_markup/render-codeblock-goat.html b/tpl/tplimpl/embedded/templates/_default/_markup/render-codeblock-goat.html
new file mode 100644
index 000000000..7c2b99f3f
--- /dev/null
+++ b/tpl/tplimpl/embedded/templates/_default/_markup/render-codeblock-goat.html
@@ -0,0 +1 @@
+adf
diff --git a/tpl/tplimpl/template.go b/tpl/tplimpl/template.go
index 44b486404..706719278 100644
--- a/tpl/tplimpl/template.go
+++ b/tpl/tplimpl/template.go
@@ -281,15 +281,10 @@ func (t *templateExec) UnusedTemplates() []tpl.FileInfo {
 
 	for _, ts := range t.main.templates {
 		ti := ts.info
-		if strings.HasPrefix(ti.name, "_internal/") {
-			continue
-		}
-		if strings.HasPrefix(ti.name, "partials/inline/pagination") {
-			// TODO(bep) we need to fix this. These are internal partials, but
-			// they may also be defined in the project, which currently could
-			// lead to some false negatives.
+		if strings.HasPrefix(ti.name, "_internal/") || ti.realFilename == "" {
 			continue
 		}
+
 		if _, found := t.templateUsageTracker[ti.name]; !found {
 			unused = append(unused, ti)
 		}
@@ -740,6 +735,7 @@ func (t *templateHandler) extractIdentifiers(line string) []string {
 }
 
 //go:embed embedded/templates/*
+//go:embed embedded/templates/_default/*
 var embededTemplatesFs embed.FS
 
 func (t *templateHandler) loadEmbedded() error {
@@ -757,9 +753,19 @@ func (t *templateHandler) loadEmbedded() error {
 		// to write the templates to Go files.
 		templ := string(bytes.ReplaceAll(templb, []byte("\r\n"), []byte("\n")))
 		name := strings.TrimPrefix(filepath.ToSlash(path), "embedded/templates/")
+		templateName := name
 
-		if err := t.AddTemplate(internalPathPrefix+name, templ); err != nil {
-			return err
+		// For the render hooks it does not make sense to preseve the
+		// double _indternal double book-keeping,
+		// just add it if its now provided by the user.
+		if !strings.Contains(path, "_default/_markup") {
+			templateName = internalPathPrefix + name
+		}
+
+		if _, found := t.Lookup(templateName); !found {
+			if err := t.AddTemplate(templateName, templ); err != nil {
+				return err
+			}
 		}
 
 		if aliases, found := embeddedTemplatesAliases[name]; found {
diff --git a/tpl/tplimpl/template_funcs.go b/tpl/tplimpl/template_funcs.go
index 831b846d0..8692b9ee2 100644
--- a/tpl/tplimpl/template_funcs.go
+++ b/tpl/tplimpl/template_funcs.go
@@ -38,6 +38,7 @@ import (
 	_ "github.com/gohugoio/hugo/tpl/crypto"
 	_ "github.com/gohugoio/hugo/tpl/data"
 	_ "github.com/gohugoio/hugo/tpl/debug"
+	_ "github.com/gohugoio/hugo/tpl/diagrams"
 	_ "github.com/gohugoio/hugo/tpl/encoding"
 	_ "github.com/gohugoio/hugo/tpl/fmt"
 	_ "github.com/gohugoio/hugo/tpl/hugo"
diff --git a/tpl/tplimpl/template_funcs_test.go b/tpl/tplimpl/template_funcs_test.go
index 6d2587bf7..cb1aa6feb 100644
--- a/tpl/tplimpl/template_funcs_test.go
+++ b/tpl/tplimpl/template_funcs_test.go
@@ -11,223 +11,74 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package tplimpl
+package tplimpl_test
 
 import (
-	"bytes"
-	"context"
 	"fmt"
-	"path/filepath"
-	"reflect"
+	"strings"
 	"testing"
-	"time"
 
-	"github.com/gohugoio/hugo/modules"
+	"github.com/gohugoio/hugo/hugolib"
 
-	"github.com/gohugoio/hugo/resources/page"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/common/hugo"
-	"github.com/gohugoio/hugo/common/loggers"
-	"github.com/gohugoio/hugo/config"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/hugofs"
-	"github.com/gohugoio/hugo/langs"
-	"github.com/gohugoio/hugo/langs/i18n"
-	"github.com/gohugoio/hugo/tpl"
 	"github.com/gohugoio/hugo/tpl/internal"
-	"github.com/gohugoio/hugo/tpl/partials"
-	"github.com/spf13/afero"
 )
 
-var logger = loggers.NewErrorLogger()
-
-func newTestConfig() config.Provider {
-	v := config.New()
-	v.Set("contentDir", "content")
-	v.Set("dataDir", "data")
-	v.Set("i18nDir", "i18n")
-	v.Set("layoutDir", "layouts")
-	v.Set("archetypeDir", "archetypes")
-	v.Set("assetDir", "assets")
-	v.Set("resourceDir", "resources")
-	v.Set("publishDir", "public")
-
-	langs.LoadLanguageSettings(v, nil)
-	mod, err := modules.CreateProjectModule(v)
-	if err != nil {
-		panic(err)
-	}
-	v.Set("allModules", modules.Modules{mod})
-
-	return v
-}
-
-func newDepsConfig(cfg config.Provider) deps.DepsCfg {
-	l := langs.NewLanguage("en", cfg)
-	return deps.DepsCfg{
-		Language:            l,
-		Site:                page.NewDummyHugoSite(cfg),
-		Cfg:                 cfg,
-		Fs:                  hugofs.NewMem(l),
-		Logger:              logger,
-		TemplateProvider:    DefaultTemplateProvider,
-		TranslationProvider: i18n.NewTranslationProvider(),
-	}
-}
-
 func TestTemplateFuncsExamples(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
-
-	workingDir := "/home/hugo"
-
-	v := newTestConfig()
-
-	v.Set("workingDir", workingDir)
-	v.Set("multilingual", true)
-	v.Set("contentDir", "content")
-	v.Set("assetDir", "assets")
-	v.Set("baseURL", "http://mysite.com/hugo/")
-	v.Set("CurrentContentLanguage", langs.NewLanguage("en", v))
-
-	fs := hugofs.NewMem(v)
 
-	afero.WriteFile(fs.Source, filepath.Join(workingDir, "files", "README.txt"), []byte("Hugo Rocks!"), 0755)
-
-	depsCfg := newDepsConfig(v)
-	depsCfg.Fs = fs
-	d, err := deps.New(depsCfg)
-	defer d.Close()
-	c.Assert(err, qt.IsNil)
-
-	var data struct {
-		Title   string
-		Section string
-		Hugo    map[string]interface{}
-		Params  map[string]interface{}
-	}
-
-	data.Title = "**BatMan**"
-	data.Section = "blog"
-	data.Params = map[string]interface{}{"langCode": "en"}
-	data.Hugo = map[string]interface{}{"Version": hugo.MustParseVersion("0.36.1").Version()}
+	files := `
+-- config.toml --
+disableKinds=["home", "section", "taxonomy", "term", "sitemap", "robotsTXT"]
+ignoreErrors = ["my-err-id"]
+[outputs]
+home=["HTML"]
+-- layouts/partials/header.html --
+<title>Hugo Rocks!</title>
+-- files/README.txt --
+Hugo Rocks!
+-- content/blog/hugo-rocks.md --
+--- 
+title: "**BatMan**"
+---
+`
+
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			NeedsOsFS:   true,
+		},
+	).Build()
+
+	d := b.H.Sites[0].Deps
+
+	var (
+		templates []string
+		expected  []string
+	)
 
 	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
 		ns := nsf(d)
 		for _, mm := range ns.MethodMappings {
-			for i, example := range mm.Examples {
-				in, expected := example[0], example[1]
-				d.WithTemplate = func(templ tpl.TemplateManager) error {
-					c.Assert(templ.AddTemplate("test", in), qt.IsNil)
-					c.Assert(templ.AddTemplate("partials/header.html", "<title>Hugo Rocks!</title>"), qt.IsNil)
-					return nil
-				}
-				c.Assert(d.LoadResources(), qt.IsNil)
-
-				var b bytes.Buffer
-				templ, _ := d.Tmpl().Lookup("test")
-				c.Assert(d.Tmpl().Execute(templ, &b, &data), qt.IsNil)
-				if b.String() != expected {
-					t.Fatalf("%s[%d]: got %q expected %q", ns.Name, i, b.String(), expected)
+			for _, example := range mm.Examples {
+				if strings.Contains(example[0], "errorf") {
+					// This will fail the build, so skip for now.
+					continue
 				}
+				templates = append(templates, example[0])
+				expected = append(expected, example[1])
 			}
 		}
 	}
-}
-
-// TODO(bep) it would be dandy to put this one into the partials package, but
-// we have some package cycle issues to solve first.
-func TestPartialCached(t *testing.T) {
-	t.Parallel()
-
-	c := qt.New(t)
-
-	partial := `Now: {{ now.UnixNano }}`
-	name := "testing"
-
-	var data struct{}
-
-	v := newTestConfig()
-
-	config := newDepsConfig(v)
-
-	config.WithTemplate = func(templ tpl.TemplateManager) error {
-		err := templ.AddTemplate("partials/"+name, partial)
-		if err != nil {
-			return err
-		}
-
-		return nil
-	}
-
-	de, err := deps.New(config)
-	c.Assert(err, qt.IsNil)
-	defer de.Close()
-	c.Assert(de.LoadResources(), qt.IsNil)
-
-	ns := partials.New(de)
 
-	res1, err := ns.IncludeCached(context.Background(), name, &data)
-	c.Assert(err, qt.IsNil)
+	files += fmt.Sprintf("-- layouts/_default/single.html --\n%s\n", strings.Join(templates, "\n"))
+	b = hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			NeedsOsFS:   true,
+		},
+	).Build()
 
-	for j := 0; j < 10; j++ {
-		time.Sleep(2 * time.Nanosecond)
-		res2, err := ns.IncludeCached(context.Background(), name, &data)
-		c.Assert(err, qt.IsNil)
-
-		if !reflect.DeepEqual(res1, res2) {
-			t.Fatalf("cache mismatch")
-		}
-
-		res3, err := ns.IncludeCached(context.Background(), name, &data, fmt.Sprintf("variant%d", j))
-		c.Assert(err, qt.IsNil)
-
-		if reflect.DeepEqual(res1, res3) {
-			t.Fatalf("cache mismatch")
-		}
-	}
-}
-
-func BenchmarkPartial(b *testing.B) {
-	doBenchmarkPartial(b, func(ns *partials.Namespace) error {
-		_, err := ns.Include(context.Background(), "bench1")
-		return err
-	})
-}
-
-func BenchmarkPartialCached(b *testing.B) {
-	doBenchmarkPartial(b, func(ns *partials.Namespace) error {
-		_, err := ns.IncludeCached(context.Background(), "bench1", nil)
-		return err
-	})
-}
-
-func doBenchmarkPartial(b *testing.B, f func(ns *partials.Namespace) error) {
-	c := qt.New(b)
-	config := newDepsConfig(config.New())
-	config.WithTemplate = func(templ tpl.TemplateManager) error {
-		err := templ.AddTemplate("partials/bench1", `{{ shuffle (seq 1 10) }}`)
-		if err != nil {
-			return err
-		}
-
-		return nil
-	}
-
-	de, err := deps.New(config)
-	c.Assert(err, qt.IsNil)
-	defer de.Close()
-	c.Assert(de.LoadResources(), qt.IsNil)
-
-	ns := partials.New(de)
-
-	b.ResetTimer()
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			if err := f(ns); err != nil {
-				b.Fatalf("error executing template: %s", err)
-			}
-		}
-	})
+	b.AssertFileContent("public/blog/hugo-rocks/index.html", expected...)
 }
diff --git a/tpl/tplimpl/template_info_test.go b/tpl/tplimpl/template_info_test.go
deleted file mode 100644
index eaf57166a..000000000
--- a/tpl/tplimpl/template_info_test.go
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2019 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-package tplimpl
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/hugofs"
-	"github.com/gohugoio/hugo/tpl"
-)
-
-func TestTemplateInfoShortcode(t *testing.T) {
-	c := qt.New(t)
-	d := newD(c)
-	defer d.Close()
-	h := d.Tmpl().(*templateExec)
-
-	c.Assert(h.AddTemplate("shortcodes/mytemplate.html", `
-{{ .Inner }}
-`), qt.IsNil)
-
-	c.Assert(h.postTransform(), qt.IsNil)
-
-	tt, found, _ := d.Tmpl().LookupVariant("mytemplate", tpl.TemplateVariants{})
-
-	c.Assert(found, qt.Equals, true)
-	tti, ok := tt.(tpl.Info)
-	c.Assert(ok, qt.Equals, true)
-	c.Assert(tti.ParseInfo().IsInner, qt.Equals, true)
-}
-
-// TODO(bep) move and use in other places
-func newD(c *qt.C) *deps.Deps {
-	v := newTestConfig()
-	fs := hugofs.NewMem(v)
-
-	depsCfg := newDepsConfig(v)
-	depsCfg.Fs = fs
-	d, err := deps.New(depsCfg)
-	c.Assert(err, qt.IsNil)
-
-	provider := DefaultTemplateProvider
-	provider.Update(d)
-
-	return d
-}
diff --git a/tpl/transform/init_test.go b/tpl/transform/init_test.go
deleted file mode 100644
index ec3c35897..000000000
--- a/tpl/transform/init_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package transform
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-}
diff --git a/tpl/transform/remarshal_test.go b/tpl/transform/remarshal_test.go
index 8e94ef6bf..22548593b 100644
--- a/tpl/transform/remarshal_test.go
+++ b/tpl/transform/remarshal_test.go
@@ -11,13 +11,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package transform
+package transform_test
 
 import (
 	"testing"
 
-	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/htesting"
+	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/tpl/transform"
 
 	qt "github.com/frankban/quicktest"
 )
@@ -25,13 +26,14 @@ import (
 func TestRemarshal(t *testing.T) {
 	t.Parallel()
 
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
+
+	ns := transform.New(b.H.Deps)
 	c := qt.New(t)
 
 	c.Run("Roundtrip variants", func(c *qt.C) {
-
 		tomlExample := `title = 'Test Metadata'
 		
 [[resources]]
@@ -129,7 +131,6 @@ title: Test Metadata
 
 			}
 		}
-
 	})
 
 	c.Run("Comments", func(c *qt.C) {
diff --git a/tpl/transform/transform.go b/tpl/transform/transform.go
index 8ea91f234..dc7cc0342 100644
--- a/tpl/transform/transform.go
+++ b/tpl/transform/transform.go
@@ -19,6 +19,9 @@ import (
 	"html/template"
 
 	"github.com/gohugoio/hugo/cache/namedmemcache"
+	"github.com/gohugoio/hugo/common/herrors"
+	"github.com/gohugoio/hugo/markup/converter/hooks"
+	"github.com/gohugoio/hugo/markup/highlight"
 
 	"github.com/gohugoio/hugo/deps"
 	"github.com/gohugoio/hugo/helpers"
@@ -65,18 +68,28 @@ func (ns *Namespace) Highlight(s interface{}, lang string, opts ...interface{})
 		return "", err
 	}
 
-	sopts := ""
+	var optsv interface{}
 	if len(opts) > 0 {
-		sopts, err = cast.ToStringE(opts[0])
-		if err != nil {
-			return "", err
-		}
+		optsv = opts[0]
 	}
 
-	highlighted, _ := ns.deps.ContentSpec.Converters.Highlight(ss, lang, sopts)
+	hl := ns.deps.ContentSpec.Converters.GetHighlighter()
+	highlighted, _ := hl.Highlight(ss, lang, optsv)
 	return template.HTML(highlighted), nil
 }
 
+// HighlightCodeBlock highlights a code block on the form received in the codeblock render hooks.
+func (ns *Namespace) HighlightCodeBlock(ctx hooks.CodeblockContext, opts ...interface{}) (highlight.HightlightResult, error) {
+	var optsv interface{}
+	if len(opts) > 0 {
+		optsv = opts[0]
+	}
+
+	hl := ns.deps.ContentSpec.Converters.GetHighlighter()
+
+	return hl.HighlightCodeBlock(ctx, optsv)
+}
+
 // HTMLEscape returns a copy of s with reserved HTML characters escaped.
 func (ns *Namespace) HTMLEscape(s interface{}) (string, error) {
 	ss, err := cast.ToStringE(s)
@@ -100,20 +113,22 @@ func (ns *Namespace) HTMLUnescape(s interface{}) (string, error) {
 
 // Markdownify renders a given input from Markdown to HTML.
 func (ns *Namespace) Markdownify(s interface{}) (template.HTML, error) {
+	defer herrors.Recover()
 	ss, err := cast.ToStringE(s)
 	if err != nil {
 		return "", err
 	}
 
-	b, err := ns.deps.ContentSpec.RenderMarkdown([]byte(ss))
-	if err != nil {
-		return "", err
+	home := ns.deps.Site.Home()
+	if home == nil {
+		panic("home must not be nil")
 	}
+	sss, err := home.RenderString(ss)
 
 	// Strip if this is a short inline type of text.
-	b = ns.deps.ContentSpec.TrimShortHTML(b)
+	bb := ns.deps.ContentSpec.TrimShortHTML([]byte(sss))
 
-	return helpers.BytesToHTML(b), nil
+	return helpers.BytesToHTML(bb), nil
 }
 
 // Plainify returns a copy of s with all HTML tags removed.
@@ -125,3 +140,7 @@ func (ns *Namespace) Plainify(s interface{}) (string, error) {
 
 	return helpers.StripHTML(ss), nil
 }
+
+func (ns *Namespace) Reset() {
+	ns.cache.Clear()
+}
diff --git a/tpl/transform/transform_test.go b/tpl/transform/transform_test.go
index 260de5f83..3ccf1a270 100644
--- a/tpl/transform/transform_test.go
+++ b/tpl/transform/transform_test.go
@@ -11,13 +11,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package transform
+package transform_test
 
 import (
 	"html/template"
 	"testing"
 
 	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/tpl/transform"
 	"github.com/spf13/afero"
 
 	qt "github.com/frankban/quicktest"
@@ -32,10 +34,11 @@ type tstNoStringer struct{}
 
 func TestEmojify(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -49,23 +52,23 @@ func TestEmojify(t *testing.T) {
 
 		result, err := ns.Emojify(test.s)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
 func TestHighlight(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -82,23 +85,23 @@ func TestHighlight(t *testing.T) {
 
 		result, err := ns.Highlight(test.s, test.lang, test.opts)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(string(result), qt.Contains, test.expect.(string))
+		b.Assert(err, qt.IsNil)
+		b.Assert(string(result), qt.Contains, test.expect.(string))
 	}
 }
 
 func TestHTMLEscape(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -112,23 +115,23 @@ func TestHTMLEscape(t *testing.T) {
 
 		result, err := ns.HTMLEscape(test.s)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
 func TestHTMLUnescape(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -142,23 +145,23 @@ func TestHTMLUnescape(t *testing.T) {
 
 		result, err := ns.HTMLUnescape(test.s)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
 func TestMarkdownify(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -171,23 +174,24 @@ func TestMarkdownify(t *testing.T) {
 
 		result, err := ns.Markdownify(test.s)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
 // Issue #3040
 func TestMarkdownifyBlocksOfText(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
-	v := config.New()
-	v.Set("contentDir", "content")
-	ns := New(newDeps(v))
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
+
+	ns := transform.New(b.H.Deps)
 
 	text := `
 #First 
@@ -202,17 +206,18 @@ And then some.
 `
 
 	result, err := ns.Markdownify(text)
-	c.Assert(err, qt.IsNil)
-	c.Assert(result, qt.Equals, template.HTML(
+	b.Assert(err, qt.IsNil)
+	b.Assert(result, qt.Equals, template.HTML(
 		"<p>#First</p>\n<p>This is some <em>bold</em> text.</p>\n<h2 id=\"second\">Second</h2>\n<p>This is some more text.</p>\n<p>And then some.</p>\n"))
 }
 
 func TestPlainify(t *testing.T) {
 	t.Parallel()
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
 
-	v := config.New()
-	ns := New(newDeps(v))
+	ns := transform.New(b.H.Deps)
 
 	for _, test := range []struct {
 		s      interface{}
@@ -225,13 +230,13 @@ func TestPlainify(t *testing.T) {
 
 		result, err := ns.Plainify(test.s)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 			continue
 		}
 
-		c.Assert(err, qt.IsNil)
-		c.Assert(result, qt.Equals, test.expect)
+		b.Assert(err, qt.IsNil)
+		b.Assert(result, qt.Equals, test.expect)
 	}
 }
 
diff --git a/tpl/transform/unmarshal_test.go b/tpl/transform/unmarshal_test.go
index fb0e446c3..2b14282ec 100644
--- a/tpl/transform/unmarshal_test.go
+++ b/tpl/transform/unmarshal_test.go
@@ -11,7 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package transform
+package transform_test
 
 import (
 	"fmt"
@@ -19,7 +19,8 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/tpl/transform"
 
 	"github.com/gohugoio/hugo/common/hugio"
 	"github.com/gohugoio/hugo/resources/resource"
@@ -80,12 +81,14 @@ func (t testContentResource) Key() string {
 }
 
 func TestUnmarshal(t *testing.T) {
-	v := config.New()
-	ns := New(newDeps(v))
-	c := qt.New(t)
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: t},
+	).Build()
+
+	ns := transform.New(b.H.Deps)
 
 	assertSlogan := func(m map[string]interface{}) {
-		c.Assert(m["slogan"], qt.Equals, "Hugo Rocks!")
+		b.Assert(m["slogan"], qt.Equals, "Hugo Rocks!")
 	}
 
 	for _, test := range []struct {
@@ -116,24 +119,24 @@ func TestUnmarshal(t *testing.T) {
 		}},
 		{testContentResource{key: "r1", content: `1997,Ford,E350,"ac, abs, moon",3000.00
 1999,Chevy,"Venture ""Extended Edition""","",4900.00`, mime: media.CSVType}, nil, func(r [][]string) {
-			c.Assert(len(r), qt.Equals, 2)
+			b.Assert(len(r), qt.Equals, 2)
 			first := r[0]
-			c.Assert(len(first), qt.Equals, 5)
-			c.Assert(first[1], qt.Equals, "Ford")
+			b.Assert(len(first), qt.Equals, 5)
+			b.Assert(first[1], qt.Equals, "Ford")
 		}},
 		{testContentResource{key: "r1", content: `a;b;c`, mime: media.CSVType}, map[string]interface{}{"delimiter": ";"}, func(r [][]string) {
-			c.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
+			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		{"a,b,c", nil, func(r [][]string) {
-			c.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
+			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		{"a;b;c", map[string]interface{}{"delimiter": ";"}, func(r [][]string) {
-			c.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
+			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		{testContentResource{key: "r1", content: `
 % This is a comment
 a;b;c`, mime: media.CSVType}, map[string]interface{}{"DElimiter": ";", "Comment": "%"}, func(r [][]string) {
-			c.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
+			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		// errors
 		{"thisisnotavaliddataformat", nil, false},
@@ -144,7 +147,7 @@ a;b;c`, mime: media.CSVType}, map[string]interface{}{"DElimiter": ";", "Comment"
 		{tstNoStringer{}, nil, false},
 	} {
 
-		ns.cache.Clear()
+		ns.Reset()
 
 		var args []interface{}
 
@@ -156,29 +159,32 @@ a;b;c`, mime: media.CSVType}, map[string]interface{}{"DElimiter": ";", "Comment"
 
 		result, err := ns.Unmarshal(args...)
 
-		if b, ok := test.expect.(bool); ok && !b {
-			c.Assert(err, qt.Not(qt.IsNil))
+		if bb, ok := test.expect.(bool); ok && !bb {
+			b.Assert(err, qt.Not(qt.IsNil))
 		} else if fn, ok := test.expect.(func(m map[string]interface{})); ok {
-			c.Assert(err, qt.IsNil)
+			b.Assert(err, qt.IsNil)
 			m, ok := result.(map[string]interface{})
-			c.Assert(ok, qt.Equals, true)
+			b.Assert(ok, qt.Equals, true)
 			fn(m)
 		} else if fn, ok := test.expect.(func(r [][]string)); ok {
-			c.Assert(err, qt.IsNil)
+			b.Assert(err, qt.IsNil)
 			r, ok := result.([][]string)
-			c.Assert(ok, qt.Equals, true)
+			b.Assert(ok, qt.Equals, true)
 			fn(r)
 		} else {
-			c.Assert(err, qt.IsNil)
-			c.Assert(result, qt.Equals, test.expect)
+			b.Assert(err, qt.IsNil)
+			b.Assert(result, qt.Equals, test.expect)
 		}
 
 	}
 }
 
 func BenchmarkUnmarshalString(b *testing.B) {
-	v := config.New()
-	ns := New(newDeps(v))
+	bb := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: b},
+	).Build()
+
+	ns := transform.New(bb.H.Deps)
 
 	const numJsons = 100
 
@@ -200,8 +206,11 @@ func BenchmarkUnmarshalString(b *testing.B) {
 }
 
 func BenchmarkUnmarshalResource(b *testing.B) {
-	v := config.New()
-	ns := New(newDeps(v))
+	bb := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{T: b},
+	).Build()
+
+	ns := transform.New(bb.H.Deps)
 
 	const numJsons = 100
 
diff --git a/tpl/urls/init_test.go b/tpl/urls/init_test.go
deleted file mode 100644
index 7e53c247a..000000000
--- a/tpl/urls/init_test.go
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2017 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package urls
-
-import (
-	"testing"
-
-	"github.com/gohugoio/hugo/config"
-
-	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/htesting/hqt"
-	"github.com/gohugoio/hugo/tpl/internal"
-)
-
-func TestInit(t *testing.T) {
-	c := qt.New(t)
-	var found bool
-	var ns *internal.TemplateFuncsNamespace
-
-	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{Cfg: config.New()})
-		if ns.Name == name {
-			found = true
-			break
-		}
-	}
-
-	c.Assert(found, qt.Equals, true)
-	ctx, err := ns.Context()
-	c.Assert(err, qt.IsNil)
-	c.Assert(ctx, hqt.IsSameType, &Namespace{})
-
-}