output: Move layout logic to the output package

output/layout_test.go

@@ -0,0 +1,68 @@
+// Copyright 2017-present 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 output
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+type testLayoutIdentifier struct {
+	pageKind    string
+	pageSection string
+	pageLayout  string
+	pageType    string
+}
+
+func (l testLayoutIdentifier) PageKind() string {
+	return l.pageKind
+}
+
+func (l testLayoutIdentifier) PageLayout() string {
+	return l.pageLayout
+}
+
+func (l testLayoutIdentifier) PageType() string {
+	return l.pageType
+}
+
+func (l testLayoutIdentifier) PageSection() string {
+	return l.pageSection
+}
+
+func TestLayout(t *testing.T) {
+	l := &Layout{}
+
+	for _, this := range []struct {
+		li     testLayoutIdentifier
+		tp     Type
+		expect []string
+	}{
+		{testLayoutIdentifier{"home", "", "", ""}, HTMLType, []string{"index.html", "_default/list.html", "theme/index.html", "theme/_default/list.html"}},
+		{testLayoutIdentifier{"section", "sect1", "", ""}, HTMLType, []string{"section/sect1.html", "sect1/list.html"}},
+		{testLayoutIdentifier{"taxonomy", "tag", "", ""}, HTMLType, []string{"taxonomy/tag.html", "indexes/tag.html"}},
+		{testLayoutIdentifier{"taxonomyTerm", "categories", "", ""}, HTMLType, []string{"taxonomy/categories.terms.html", "_default/terms.html"}},
+		{testLayoutIdentifier{"page", "", "", ""}, HTMLType, []string{"_default/single.html", "theme/_default/single.html"}},
+		{testLayoutIdentifier{"page", "", "mylayout", ""}, HTMLType, []string{"_default/mylayout.html"}},
+		{testLayoutIdentifier{"page", "", "mylayout", "myttype"}, HTMLType, []string{"myttype/mylayout.html", "_default/mylayout.html"}},
+		{testLayoutIdentifier{"page", "", "mylayout", "myttype/mysubtype"}, HTMLType, []string{"myttype/mysubtype/mylayout.html", "myttype/mylayout.html", "_default/mylayout.html"}},
+	} {
+		layouts := l.For(this.li, this.tp)
+		require.NotNil(t, layouts)
+		require.True(t, len(layouts) >= len(this.expect))
+		// Not checking the complete list for now ...
+		require.Equal(t, this.expect, layouts[:len(this.expect)])
+	}
+}