Make js.Build fully support modules

Fixes #7816
Fixes #7777
Fixes #7916

resources/resource_transformers/js/options_test.go

@@ -0,0 +1,105 @@
+// 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 js
+
+import (
+	"testing"
+
+	"github.com/gohugoio/hugo/media"
+
+	"github.com/evanw/esbuild/pkg/api"
+
+	qt "github.com/frankban/quicktest"
+)
+
+// This test is added to test/warn against breaking the "stability" of the
+// cache key. It's sometimes needed to break this, but should be avoided if possible.
+func TestOptionKey(t *testing.T) {
+	c := qt.New(t)
+
+	opts := map[string]interface{}{
+		"TargetPath": "foo",
+		"Target":     "es2018",
+	}
+
+	key := (&buildTransformation{optsm: opts}).Key()
+
+	c.Assert(key.Value(), qt.Equals, "jsbuild_7891849149754191852")
+}
+
+func TestToBuildOptions(t *testing.T) {
+	c := qt.New(t)
+
+	opts, err := toBuildOptions(Options{mediaType: media.JavascriptType})
+
+	c.Assert(err, qt.IsNil)
+	c.Assert(opts, qt.DeepEquals, api.BuildOptions{
+		Bundle: true,
+		Target: api.ESNext,
+		Format: api.FormatIIFE,
+		Stdin: &api.StdinOptions{
+			Loader: api.LoaderJS,
+		},
+	})
+
+	opts, err = toBuildOptions(Options{
+		Target: "es2018", Format: "cjs", Minify: true, mediaType: media.JavascriptType})
+	c.Assert(err, qt.IsNil)
+	c.Assert(opts, qt.DeepEquals, api.BuildOptions{
+		Bundle:            true,
+		Target:            api.ES2018,
+		Format:            api.FormatCommonJS,
+		MinifyIdentifiers: true,
+		MinifySyntax:      true,
+		MinifyWhitespace:  true,
+		Stdin: &api.StdinOptions{
+			Loader: api.LoaderJS,
+		},
+	})
+
+	opts, err = toBuildOptions(Options{
+		Target: "es2018", Format: "cjs", Minify: true, mediaType: media.JavascriptType,
+		SourceMap: "inline"})
+	c.Assert(err, qt.IsNil)
+	c.Assert(opts, qt.DeepEquals, api.BuildOptions{
+		Bundle:            true,
+		Target:            api.ES2018,
+		Format:            api.FormatCommonJS,
+		MinifyIdentifiers: true,
+		MinifySyntax:      true,
+		MinifyWhitespace:  true,
+		Sourcemap:         api.SourceMapInline,
+		Stdin: &api.StdinOptions{
+			Loader: api.LoaderJS,
+		},
+	})
+
+	opts, err = toBuildOptions(Options{
+		Target: "es2018", Format: "cjs", Minify: true, mediaType: media.JavascriptType,
+		SourceMap: "external"})
+	c.Assert(err, qt.IsNil)
+	c.Assert(opts, qt.DeepEquals, api.BuildOptions{
+		Bundle:            true,
+		Target:            api.ES2018,
+		Format:            api.FormatCommonJS,
+		MinifyIdentifiers: true,
+		MinifySyntax:      true,
+		MinifyWhitespace:  true,
+		Sourcemap:         api.SourceMapExternal,
+		Stdin: &api.StdinOptions{
+			Loader: api.LoaderJS,
+		},
+	})
+
+}