featurens: added multiple namespace testing for namespace detector

database/pgsql/testdata/data.sql

@@ -36,11 +36,11 @@ INSERT INTO layer (id, name, engineversion, parent_id) VALUES
   (5, 'layer-3b', 1, 3);
 
 INSERT INTO layer_namespace (id, layer_id, namespace_id) VALUES
-(1, 2, 1),
-(2, 3, 1),
-(3, 4, 1),
-(4, 5, 2),
-(5, 5, 1);
+  (1, 2, 1),
+  (2, 3, 1),
+  (3, 4, 1),
+  (4, 5, 2),
+  (5, 5, 1);
 
 INSERT INTO layer_diff_featureversion (id, layer_id, featureversion_id, modification) VALUES
   (1, 2, 1, 'add'),

ext/featurens/driver_test.go

@@ -0,0 +1,66 @@
+package featurens_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/coreos/clair/database"
+	"github.com/coreos/clair/ext/featurens"
+	"github.com/coreos/clair/pkg/tarutil"
+
+	_ "github.com/coreos/clair/ext/featurens/alpinerelease"
+	_ "github.com/coreos/clair/ext/featurens/aptsources"
+	_ "github.com/coreos/clair/ext/featurens/lsbrelease"
+	_ "github.com/coreos/clair/ext/featurens/osrelease"
+	_ "github.com/coreos/clair/ext/featurens/redhatrelease"
+)
+
+type MultipleNamespaceTestData struct {
+	Files              tarutil.FilesMap
+	ExpectedNamespaces []database.Namespace
+}
+
+func assertnsNameEqual(t *testing.T, nslist_expected, nslist []database.Namespace) {
+	assert.Equal(t, len(nslist_expected), len(nslist))
+	expected := map[string]struct{}{}
+	input := map[string]struct{}{}
+	// compare the two sets
+	for i := range nslist_expected {
+		expected[nslist_expected[i].Name] = struct{}{}
+		input[nslist[i].Name] = struct{}{}
+	}
+	assert.Equal(t, expected, input)
+}
+
+func testMultipleNamespace(t *testing.T, testData []MultipleNamespaceTestData) {
+	for _, td := range testData {
+		nslist, err := featurens.Detect(td.Files)
+		assert.Nil(t, err)
+		assertnsNameEqual(t, td.ExpectedNamespaces, nslist)
+	}
+}
+
+func TestMultipleNamespaceDetector(t *testing.T) {
+	testData := []MultipleNamespaceTestData{
+		{
+			ExpectedNamespaces: []database.Namespace{
+				database.Namespace{Name: "debian:8", VersionFormat: "dpkg"},
+				database.Namespace{Name: "alpine:v3.3", VersionFormat: "dpkg"},
+			},
+			Files: tarutil.FilesMap{
+				"etc/os-release": []byte(`
+PRETTY_NAME="Debian GNU/Linux 8 (jessie)"
+NAME="Debian GNU/Linux"
+VERSION_ID="8"
+VERSION="8 (jessie)"
+ID=debian
+HOME_URL="http://www.debian.org/"
+SUPPORT_URL="http://www.debian.org/support/"
+BUG_REPORT_URL="https://bugs.debian.org/"`),
+				"etc/alpine-release": []byte(`3.3.4`),
+			},
+		},
+	}
+	testMultipleNamespace(t, testData)
+}