Tests: move tests from USD test directory into `io/common` and `io/usd`

This commit is a followup of {D7649}, and ports the USD tests to the new
testing approach. It moves test code from `tests/gtests/usd` into
`source/blender/io/common` and `source/blender/io/usd`, and adjusts the
use of namespaces to be consistent with the other tests.

I decided to put one test into `io/usd/tests`, instead of
`io/usd/intern`. The reason is that this test does not correspond with a
single file in that directory; instead, it tests Blender's integration
with the USD library itself.

There are two new CLI arguments for the Big Test Runner:

- `--test-assets-dir`, which points to the `lib/tests` directory in the
  SVN repository. This allows unit tests to find test assets.
- `--test-release-dir`, which points to `bin/{BLENDER_VERSION}` in the
  build directory. At the moment this is only used by the USD test.

The CLI arguments are automatically passed to the Big Test Runner when
using `ctest`. When manually running the tests, the arguments are only
required when there is a test run that needs them.

For more info about splitting some code into 'common', see
rB084c5d6c7e2cf8.

No functional changes to the tests themselves, only to the way they are
built & run.

Differential Revision: https://developer.blender.org/D8314

Reviewed by: brecht, mont29

1 files changed, 129 insertions, 0 deletions

diff --git a/source/blender/io/common/intern/hierarchy_context_order_test.cc b/source/blender/io/common/intern/hierarchy_context_order_test.cc
new file mode 100644
index 00000000000..7273b92c479
--- /dev/null
+++ b/source/blender/io/common/intern/hierarchy_context_order_test.cc
@@ -0,0 +1,129 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+#include "IO_abstract_hierarchy_iterator.h"
+
+#include "testing/testing.h"
+
+extern "C" {
+#include "BLI_utildefines.h"
+}
+
+namespace blender::io {
+
+namespace {
+
+Object *fake_pointer(int value)
+{
+  return static_cast<Object *>(POINTER_FROM_INT(value));
+}
+
+}  // namespace
+
+class HierarchyContextOrderTest : public testing::Test {
+};
+
+TEST_F(HierarchyContextOrderTest, ObjectPointerTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.duplicator = nullptr;
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(2);
+  ctx_b.duplicator = nullptr;
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, DuplicatorPointerTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.duplicator = fake_pointer(1);
+  ctx_a.export_name = "A";
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(1);
+  ctx_b.duplicator = fake_pointer(1);
+  ctx_b.export_name = "B";
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, ExportParentTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.export_parent = fake_pointer(1);
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(1);
+  ctx_b.export_parent = fake_pointer(2);
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, TransitiveTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.export_parent = fake_pointer(1);
+  ctx_a.duplicator = nullptr;
+  ctx_a.export_name = "A";
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(2);
+  ctx_b.export_parent = nullptr;
+  ctx_b.duplicator = fake_pointer(1);
+  ctx_b.export_name = "B";
+
+  HierarchyContext ctx_c = {0};
+  ctx_c.object = fake_pointer(2);
+  ctx_c.export_parent = fake_pointer(2);
+  ctx_c.duplicator = fake_pointer(1);
+  ctx_c.export_name = "C";
+
+  HierarchyContext ctx_d = {0};
+  ctx_d.object = fake_pointer(2);
+  ctx_d.export_parent = fake_pointer(3);
+  ctx_d.duplicator = nullptr;
+  ctx_d.export_name = "D";
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_LT(ctx_a, ctx_c);
+  EXPECT_LT(ctx_a, ctx_d);
+  EXPECT_LT(ctx_b, ctx_c);
+  EXPECT_LT(ctx_b, ctx_d);
+  EXPECT_LT(ctx_c, ctx_d);
+
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_c < ctx_a);
+  EXPECT_FALSE(ctx_d < ctx_a);
+  EXPECT_FALSE(ctx_c < ctx_b);
+  EXPECT_FALSE(ctx_d < ctx_b);
+  EXPECT_FALSE(ctx_d < ctx_c);
+}
+
+}  // namespace blender::io