Rename transpileJS to babel

And add a test.

Updates #5764

hugolib/resource_chain_babel_test.go

@@ -0,0 +1,127 @@
+// 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 hugolib
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"testing"
+
+	"github.com/gohugoio/hugo/htesting"
+
+	"github.com/spf13/viper"
+
+	qt "github.com/frankban/quicktest"
+
+	"github.com/gohugoio/hugo/hugofs"
+
+	"github.com/gohugoio/hugo/common/loggers"
+)
+
+func TestResourceChainBabel(t *testing.T) {
+	if !isCI() {
+		t.Skip("skip (relative) long running modules test when running locally")
+	}
+
+	if runtime.GOOS == "windows" {
+		t.Skip("skip npm test on Windows")
+	}
+
+	wd, _ := os.Getwd()
+	defer func() {
+		os.Chdir(wd)
+	}()
+
+	c := qt.New(t)
+
+	packageJSON := `{
+  "scripts": {},
+
+  "devDependencies": {
+    "@babel/cli": "7.8.4",
+    "@babel/core": "7.9.0",
+    "@babel/preset-env": "7.9.5"
+  }
+}
+`
+
+	babelConfig := `
+console.error("Hugo Environment:", process.env.HUGO_ENVIRONMENT );
+
+module.exports = {
+  presets: ["@babel/preset-env"],
+};
+
+`
+
+	js := `
+/* A Car */
+class Car {
+  constructor(brand) {
+    this.carname = brand;
+  }
+}
+`
+
+	workDir, clean, err := htesting.CreateTempDir(hugofs.Os, "hugo-test-babel")
+	c.Assert(err, qt.IsNil)
+	defer clean()
+
+	v := viper.New()
+	v.Set("workingDir", workDir)
+	v.Set("disableKinds", []string{"taxonomyTerm", "taxonomy", "page"})
+	b := newTestSitesBuilder(t).WithLogger(loggers.NewWarningLogger())
+
+	// Need to use OS fs for this.
+	b.Fs = hugofs.NewDefault(v)
+	b.WithWorkingDir(workDir)
+	b.WithViper(v)
+	b.WithContent("p1.md", "")
+
+	b.WithTemplates("index.html", `
+{{ $options := dict "noComments" true }}
+{{ $transpiled := resources.Get "js/main.js" | babel -}}
+Transpiled: {{ $transpiled.Content | safeJS }}
+
+`)
+
+	jsDir := filepath.Join(workDir, "assets", "js")
+	b.Assert(os.MkdirAll(jsDir, 0777), qt.IsNil)
+	b.WithSourceFile("assets/js/main.js", js)
+	b.WithSourceFile("package.json", packageJSON)
+	b.WithSourceFile("babel.config.js", babelConfig)
+
+	b.Assert(os.Chdir(workDir), qt.IsNil)
+	_, err = exec.Command("npm", "install").CombinedOutput()
+	b.Assert(err, qt.IsNil)
+
+	out, err := captureStderr(func() error {
+		return b.BuildE(BuildCfg{})
+
+	})
+	// Make sure Node sees this.
+	b.Assert(out, qt.Contains, "Hugo Environment: production")
+	b.Assert(err, qt.IsNil)
+
+	b.AssertFileContent("public/index.html", `
+var Car = function Car(brand) {
+ _classCallCheck(this, Car);
+
+ this.carname = brand;
+};
+`)
+
+}