1 files changed, 121 insertions, 0 deletions
diff --git a/spec/lib/sbom/package_url/decoder_spec.rb b/spec/lib/sbom/package_url/decoder_spec.rb
new file mode 100644
index 00000000000..5b480475b7c
--- /dev/null
+++ b/spec/lib/sbom/package_url/decoder_spec.rb
@@ -0,0 +1,121 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'rspec-parameterized'
+
+require_relative '../../../support/shared_contexts/lib/sbom/package_url_shared_contexts'
+
+RSpec.describe Sbom::PackageUrl::Decoder do
+  describe '#decode' do
+    subject(:decode) { described_class.new(purl).decode! }
+
+    include_context 'with valid purl examples'
+
+    with_them do
+      it do
+        is_expected.to have_attributes(
+          type: type,
+          namespace: namespace,
+          name: name,
+          version: version,
+          qualifiers: qualifiers,
+          subpath: subpath
+        )
+      end
+    end
+
+    context 'when no argument is passed' do
+      let(:purl) { nil }
+
+      it 'raises an error' do
+        expect { decode }.to raise_error(ArgumentError)
+      end
+    end
+
+    context 'when an invalid package URL string is passed' do
+      include_context 'with invalid purl examples'
+
+      with_them do
+        it 'raises an error' do
+          expect { decode }.to raise_error(Sbom::PackageUrl::InvalidPackageUrl)
+        end
+      end
+    end
+
+    context 'when namespace or subpath contains an encoded slash' do
+      where(:purl) do
+        [
+          'pkg:golang/google.org/golang/genproto#googleapis%2fapi%2fannotations',
+          'pkg:golang/google.org%2fgolang/genproto#googleapis/api/annotations'
+        ]
+      end
+
+      with_them do
+        it { expect { decode }.to raise_error(Sbom::PackageUrl::InvalidPackageUrl) }
+      end
+    end
+
+    context 'when name contains an encoded slash' do
+      let(:purl) { 'pkg:golang/google.org/golang%2fgenproto#googleapis/api/annotations' }
+
+      it do
+        is_expected.to have_attributes(
+          type: 'golang',
+          namespace: 'google.org',
+          name: 'golang/genproto',
+          version: nil,
+          qualifiers: nil,
+          subpath: 'googleapis/api/annotations'
+        )
+      end
+    end
+
+    context 'with URL encoded segments' do
+      let(:purl) do
+        'pkg:golang/namespace%21/google.golang.org%20genproto@version%21?k=v%21#googleapis%20api%20annotations'
+      end
+
+      it 'decodes them' do
+        is_expected.to have_attributes(
+          type: 'golang',
+          namespace: 'namespace!',
+          name: 'google.golang.org genproto',
+          version: 'version!',
+          qualifiers: { 'k' => 'v!' },
+          subpath: 'googleapis api annotations'
+        )
+      end
+    end
+
+    context 'when segments contain empty values' do
+      let(:purl) { 'pkg:golang/google.golang.org//.././genproto#googleapis/..//./api/annotations' }
+
+      it 'removes them from the segments' do
+        is_expected.to have_attributes(
+          type: 'golang',
+          namespace: 'google.golang.org/../.', # . and .. are allowed in the namespace, but not the subpath
+          name: 'genproto',
+          version: nil,
+          qualifiers: nil,
+          subpath: 'googleapis/api/annotations'
+        )
+      end
+    end
+
+    context 'when qualifiers have no value' do
+      let(:purl) { 'pkg:rpm/fedora/curl@7.50.3-1.fc25?arch=i386&distro=fedora-25&foo=&bar=' }
+
+      it 'they are ignored' do
+        is_expected.to have_attributes(
+          type: 'rpm',
+          namespace: 'fedora',
+          name: 'curl',
+          version: '7.50.3-1.fc25',
+          qualifiers: { 'arch' => 'i386',
+                        'distro' => 'fedora-25' },
+          subpath: nil
+        )
+      end
+    end
+  end
+end