Fix existing tests

- virtual files now have a .js extension by default
- systemjs module references include this file extension
- amd module references omit this file extension. this seems to be
  consistent with amd output of other chunks

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/cjs/commonjs.js

@@ -2,7 +2,7 @@
 
 var require$$0 = require('external');
 require('./other.js');
-var other = require('./_virtual/other.js_commonjs-exports');
+var other = require('./_virtual/other.js_commonjs-exports.js');
 
 function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
 

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/cjs/other.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var other = require('./_virtual/other.js_commonjs-exports');
+var other = require('./_virtual/other.js_commonjs-exports.js');
 
 other.__exports.value = 43;
 

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/es/commonjs.js

@@ -1,6 +1,6 @@
 import require$$0 from 'external';
 import './other.js';
-import { __exports as other } from './_virtual/other.js_commonjs-exports';
+import { __exports as other } from './_virtual/other.js_commonjs-exports.js';
 
 const external = require$$0;
 const { value } = other;

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/es/other.js

@@ -1,4 +1,4 @@
-import { __exports as other } from './_virtual/other.js_commonjs-exports';
-export { __exports as default } from './_virtual/other.js_commonjs-exports';
+import { __exports as other } from './_virtual/other.js_commonjs-exports.js';
+export { __exports as default } from './_virtual/other.js_commonjs-exports.js';
 
 other.value = 43;

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/system/commonjs.js

@@ -1,4 +1,4 @@
-System.register(['external', './other.js', './_virtual/other.js_commonjs-exports'], (function (exports) {
+System.register(['external', './other.js', './_virtual/other.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var require$$0, other;
 	return {

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/system/other.js

@@ -1,4 +1,4 @@
-System.register(['./_virtual/other.js_commonjs-exports'], (function (exports) {
+System.register(['./_virtual/other.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var other;
 	return {

test/chunking-form/samples/deprecated/preserve-modules-virtual-modules/_expected/cjs/main.js

@@ -1,5 +1,5 @@
 'use strict';
 
-var _virtualModule = require('./_virtual/_virtualModule');
+var _virtualModule = require('./_virtual/_virtualModule.js');
 
 assert.equal(_virtualModule.virtual, 'Virtual!');

test/chunking-form/samples/deprecated/preserve-modules-virtual-modules/_expected/es/main.js

@@ -1,3 +1,3 @@
-import { virtual } from './_virtual/_virtualModule';
+import { virtual } from './_virtual/_virtualModule.js';
 
 assert.equal(virtual, 'Virtual!');

test/chunking-form/samples/deprecated/preserve-modules-virtual-modules/_expected/system/main.js

@@ -1,4 +1,4 @@
-System.register(['./_virtual/_virtualModule'], (function () {
+System.register(['./_virtual/_virtualModule.js'], (function () {
 	'use strict';
 	var virtual;
 	return {

test/chunking-form/samples/preserve-modules-commonjs/_expected/cjs/commonjs.js

@@ -2,7 +2,7 @@
 
 var require$$0 = require('external');
 require('./other.js');
-var other = require('./_virtual/other.js_commonjs-exports');
+var other = require('./_virtual/other.js_commonjs-exports.js');
 
 function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
 

test/chunking-form/samples/preserve-modules-commonjs/_expected/cjs/other.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var other = require('./_virtual/other.js_commonjs-exports');
+var other = require('./_virtual/other.js_commonjs-exports.js');
 
 other.__exports.value = 43;
 

test/chunking-form/samples/preserve-modules-commonjs/_expected/es/commonjs.js

@@ -1,6 +1,6 @@
 import require$$0 from 'external';
 import './other.js';
-import { __exports as other } from './_virtual/other.js_commonjs-exports';
+import { __exports as other } from './_virtual/other.js_commonjs-exports.js';
 
 const external = require$$0;
 const { value } = other;

test/chunking-form/samples/preserve-modules-commonjs/_expected/es/other.js

@@ -1,4 +1,4 @@
-import { __exports as other } from './_virtual/other.js_commonjs-exports';
-export { __exports as default } from './_virtual/other.js_commonjs-exports';
+import { __exports as other } from './_virtual/other.js_commonjs-exports.js';
+export { __exports as default } from './_virtual/other.js_commonjs-exports.js';
 
 other.value = 43;

test/chunking-form/samples/preserve-modules-commonjs/_expected/system/commonjs.js

@@ -1,4 +1,4 @@
-System.register(['external', './other.js', './_virtual/other.js_commonjs-exports'], (function (exports) {
+System.register(['external', './other.js', './_virtual/other.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var require$$0, other;
 	return {

test/chunking-form/samples/preserve-modules-commonjs/_expected/system/other.js

@@ -1,4 +1,4 @@
-System.register(['./_virtual/other.js_commonjs-exports'], (function (exports) {
+System.register(['./_virtual/other.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var other;
 	return {

test/chunking-form/samples/preserve-modules-root/_expected/cjs/below/module.js

@@ -1,7 +1,7 @@
 'use strict';
 
 require('../custom_modules/@my-scope/my-base-pkg/index.js');
-var index = require('../_virtual/index.js_commonjs-exports');
+var index = require('../_virtual/index.js_commonjs-exports.js');
 
 const base2 = index.__exports;
 

test/chunking-form/samples/preserve-modules-root/_expected/cjs/custom_modules/@my-scope/my-base-pkg/index.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var index = require('../../../_virtual/index.js_commonjs-exports');
+var index = require('../../../_virtual/index.js_commonjs-exports.js');
 
 Object.defineProperty(index.__exports, '__esModule', { value: true });
 

test/chunking-form/samples/preserve-modules-root/_expected/cjs/under-build.js

@@ -1,7 +1,7 @@
 'use strict';
 
 require('./custom_modules/@my-scope/my-base-pkg/index.js');
-var index = require('./_virtual/index.js_commonjs-exports');
+var index = require('./_virtual/index.js_commonjs-exports.js');
 
 const base = index.__exports;
 

test/chunking-form/samples/preserve-modules-root/_expected/es/below/module.js

@@ -1,5 +1,5 @@
 import '../custom_modules/@my-scope/my-base-pkg/index.js';
-import { __exports as myBasePkg } from '../_virtual/index.js_commonjs-exports';
+import { __exports as myBasePkg } from '../_virtual/index.js_commonjs-exports.js';
 
 const base2 = myBasePkg;
 

test/chunking-form/samples/preserve-modules-root/_expected/es/custom_modules/@my-scope/my-base-pkg/index.js

@@ -1,5 +1,5 @@
-import { __exports as myBasePkg } from '../../../_virtual/index.js_commonjs-exports';
-export { __exports as default } from '../../../_virtual/index.js_commonjs-exports';
+import { __exports as myBasePkg } from '../../../_virtual/index.js_commonjs-exports.js';
+export { __exports as default } from '../../../_virtual/index.js_commonjs-exports.js';
 
 Object.defineProperty(myBasePkg, '__esModule', { value: true });
 

test/chunking-form/samples/preserve-modules-root/_expected/es/under-build.js

@@ -1,5 +1,5 @@
 import './custom_modules/@my-scope/my-base-pkg/index.js';
-import { __exports as myBasePkg } from './_virtual/index.js_commonjs-exports';
+import { __exports as myBasePkg } from './_virtual/index.js_commonjs-exports.js';
 
 const base = myBasePkg;
 

test/chunking-form/samples/preserve-modules-root/_expected/system/below/module.js

@@ -1,4 +1,4 @@
-System.register(['../custom_modules/@my-scope/my-base-pkg/index.js', '../_virtual/index.js_commonjs-exports'], (function (exports) {
+System.register(['../custom_modules/@my-scope/my-base-pkg/index.js', '../_virtual/index.js_commonjs-exports.js'], (function (exports) {
   'use strict';
   var myBasePkg;
   return {

test/chunking-form/samples/preserve-modules-root/_expected/system/custom_modules/@my-scope/my-base-pkg/index.js

@@ -1,4 +1,4 @@
-System.register(['../../../_virtual/index.js_commonjs-exports'], (function (exports) {
+System.register(['../../../_virtual/index.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var myBasePkg;
 	return {

test/chunking-form/samples/preserve-modules-root/_expected/system/under-build.js

@@ -1,4 +1,4 @@
-System.register(['./custom_modules/@my-scope/my-base-pkg/index.js', './_virtual/index.js_commonjs-exports'], (function (exports) {
+System.register(['./custom_modules/@my-scope/my-base-pkg/index.js', './_virtual/index.js_commonjs-exports.js'], (function (exports) {
 	'use strict';
 	var myBasePkg;
 	return {

test/chunking-form/samples/preserve-modules-virtual-modules/_expected/cjs/main.js

@@ -1,5 +1,5 @@
 'use strict';
 
-var _virtualModule = require('./_virtual/_virtualModule');
+var _virtualModule = require('./_virtual/_virtualModule.js');
 
 assert.equal(_virtualModule.virtual, 'Virtual!');

test/chunking-form/samples/preserve-modules-virtual-modules/_expected/es/main.js

@@ -1,3 +1,3 @@
-import { virtual } from './_virtual/_virtualModule';
+import { virtual } from './_virtual/_virtualModule.js';
 
 assert.equal(virtual, 'Virtual!');

test/chunking-form/samples/preserve-modules-virtual-modules/_expected/system/main.js

@@ -1,4 +1,4 @@
-System.register(['./_virtual/_virtualModule'], (function () {
+System.register(['./_virtual/_virtualModule.js'], (function () {
 	'use strict';
 	var virtual;
 	return {

test/function/samples/deprecated/preserveModules/virtual-modules/_config.js

@@ -26,7 +26,7 @@ module.exports = {
 		return bundle.generate({ format: 'es' }).then(generated =>
 			assert.deepEqual(
 				generated.output.map(chunk => chunk.fileName),
-				['main.js', '_virtual/_virtualModule', 'lib/lib.js']
+				['main.js', '_virtual/_virtualModule.js', 'lib/lib.js']
 			)
 		);
 	}

test/function/samples/preserve-modules/virtual-modules/_config.js

@@ -23,7 +23,7 @@ module.exports = {
 		return bundle.generate({ format: 'es', preserveModules: true }).then(generated =>
 			assert.deepEqual(
 				generated.output.map(chunk => chunk.fileName),
-				['main.js', '_virtual/_virtualModule', 'lib/lib.js']
+				['main.js', '_virtual/_virtualModule.js', 'lib/lib.js']
 			)
 		);
 	}

test/misc/bundle-information.js

@@ -480,7 +480,12 @@ describe('The bundle object', () => {
 			.then(({ output }) => {
 				assert.deepEqual(
 					output.map(chunk => chunk.fileName),
-					['_virtual/input', '_virtual/dynamic1', '_virtual/other', '_virtual/dynamic2'],
+					[
+						'_virtual/input.js',
+						'_virtual/dynamic1.js',
+						'_virtual/other.js',
+						'_virtual/dynamic2.js'
+					],
 					'fileName'
 				);
 				assert.deepEqual(
@@ -491,9 +496,9 @@ describe('The bundle object', () => {
 				assert.deepEqual(
 					output.map(chunk => chunk.code),
 					[
-						`import { other } from './other';
+						`import { other } from './other.js';
 
-console.log(other);Promise.all([import('./dynamic1'), import('./dynamic2')]).then(([{dynamic1}, {dynamic2}]) => console.log(dynamic1, dynamic2));\n`,
+console.log(other);Promise.all([import('./dynamic1.js'), import('./dynamic2.js')]).then(([{dynamic1}, {dynamic2}]) => console.log(dynamic1, dynamic2));\n`,
 						'const dynamic1 = "dynamic1";\n\nexport { dynamic1 };\n',
 						'const other = "other";\n\nexport { other };\n',
 						'const dynamic2 = "dynamic2";\n\nexport { dynamic2 };\n'
@@ -507,12 +512,12 @@ console.log(other);Promise.all([import('./dynamic1'), import('./dynamic2')]).the
 				);
 				assert.deepEqual(
 					output.map(chunk => chunk.imports),
-					[['_virtual/other'], [], [], []],
+					[['_virtual/other.js'], [], [], []],
 					'imports'
 				);
 				assert.deepEqual(
 					output.map(chunk => chunk.importedBindings),
-					[{ '_virtual/other': ['other'] }, {}, {}, {}],
+					[{ '_virtual/other.js': ['other'] }, {}, {}, {}],
 					'importedBindings'
 				);
 				assert.deepEqual(
@@ -522,15 +527,15 @@ console.log(other);Promise.all([import('./dynamic1'), import('./dynamic2')]).the
 				);
 				assert.deepEqual(
 					output.map(chunk => chunk.dynamicImports),
-					[['_virtual/dynamic1', '_virtual/dynamic2'], [], [], []],
+					[['_virtual/dynamic1.js', '_virtual/dynamic2.js'], [], [], []],
 					'dynamicImports'
 				);
 				assert.deepEqual(
 					output.map(chunk => chunk.modules),
 					[
 						{
 							input: {
-								code: "console.log(other);Promise.all([import('./dynamic1'), import('./dynamic2')]).then(([{dynamic1}, {dynamic2}]) => console.log(dynamic1, dynamic2));",
+								code: "console.log(other);Promise.all([import('./dynamic1.js'), import('./dynamic2.js')]).then(([{dynamic1}, {dynamic2}]) => console.log(dynamic1, dynamic2));",
 								originalLength: 169,
 								removedExports: [],
 								renderedExports: [],