fix import module at windows

Author: mshima

lib/environment.js

@@ -33,6 +33,7 @@ const {
   createYoRcTransform,
   createYoResolveTransform
 } = require('./util/transform');
+const {requireOrImport} = require('./util/esm');
 
 const {isFilePending} = FileEditor.State;
 
@@ -564,13 +565,15 @@ class Environment extends Base {
       return;
     }
 
-    // eslint-disable-next-line node/no-unsupported-features/es-syntax
-    const importModule = async () => import(meta.resolved);
-    const instantiate = async (args, options) => this.instantiate(await this._findGeneratorClass(await meta.importGenerator()), args, options);
+    const {importGenerator, resolved} = meta;
+    const importModule = async () => requireOrImport(resolved);
+    const importGeneratorClass = async () => this._findGeneratorClass(await importGenerator(), meta);
+    const instantiate = async (args, options) => this.instantiate(await importGeneratorClass(), args, options);
     const instantiateHelp = async () => instantiate([], {help: true});
     const newMeta = {
       ...meta,
       importModule,
+      importGeneratorClass,
       instantiate,
       instantiateHelp
     };

test/environment.js

@@ -462,6 +462,38 @@ describe('Environment', () => {
     });
   });
 
+  describe.only('#getGeneratorMeta{}', () => {
+    it('importGenerator should return a class', async function () {
+      this.env
+        .register(path.join(__dirname, './fixtures/generator-module/generators/app'), 'fixtures:generator-module');
+      const meta = this.env.getGeneratorMeta('fixtures:generator-module');
+      assert.equal(typeof await meta.importGeneratorClass(), 'function');
+    });
+    it('importModule should return the generator module', async function () {
+      this.env
+        .register(path.join(__dirname, './fixtures/generator-module/generators/app'), 'fixtures:generator-module');
+      const meta = this.env.getGeneratorMeta('fixtures:generator-module');
+      const Generator = await meta.importGeneratorClass();
+      const module = await meta.importModule();
+      assert.strictEqual(Generator, module.default);
+    });
+    it('intantiate should return an instance', async function () {
+      this.env
+        .register(path.join(__dirname, './fixtures/generator-module/generators/app'), 'fixtures:generator-module');
+      const meta = this.env.getGeneratorMeta('fixtures:generator-module');
+      const Generator = await meta.importGeneratorClass();
+      const generator = await meta.instantiate();
+      assert.ok(generator instanceof Generator);
+    });
+    it('intantiateHelp should return an instance with help option', async function () {
+      this.env
+        .register(path.join(__dirname, './fixtures/generator-module/generators/app'), 'fixtures:generator-module');
+      const meta = this.env.getGeneratorMeta('fixtures:generator-module');
+      const generator = await meta.instantiateHelp();
+      assert.strictEqual(generator.options.help, true);
+    });
+  });
+
   describe('#run() a ts generator', () => {
     beforeEach(function () {
       this.env