test: additional tests for conditional ES2015 polyfills

Author: clydin

tests/legacy-cli/e2e/tests/build/polyfills.ts

@@ -15,6 +15,7 @@ export default async function () {
     await expectFileToMatch('dist/test-project/polyfills.js', 'zone.js');
     expectFileToMatch('dist/test-project/index.html', oneLineTrim`
       <script type="text/javascript" src="runtime.js"></script>
+      <script type="text/javascript" src="es2015-polyfills.js" nomodule></script>
       <script type="text/javascript" src="polyfills.js"></script>
     `);
     const jitPolyfillSize = await getFileSize('dist/test-project/polyfills.js');
@@ -27,7 +28,7 @@ export default async function () {
     await expectFileToMatch('dist/test-project/polyfills.js', 'zone.js');
     expectFileToMatch('dist/test-project/index.html', oneLineTrim`
       <script type="text/javascript" src="runtime.js"></script>
-      <script type="text/javascript" src="ie-support.js" nomodule></script>
+      <script type="text/javascript" src="es2015-polyfills.js" nomodule></script>
       <script type="text/javascript" src="polyfills.js"></script>
     `);
 }

tests/legacy-cli/e2e/tests/misc/support-ie.ts

@@ -0,0 +1,32 @@
+import { oneLineTrim } from 'common-tags';
+import { expectFileNotToExist, expectFileToMatch } from '../../utils/fs';
+import { ng } from '../../utils/process';
+import { updateJsonFile } from '../../utils/project';
+
+export default async function () {
+  await updateJsonFile('angular.json', workspaceJson => {
+      const appArchitect = workspaceJson.projects['test-project'].architect;
+      appArchitect.build.options.es5BrowserSupport = false;
+  });
+
+  await ng('build');
+  await expectFileNotToExist('dist/test-project/es2015-polyfills.js');
+  await expectFileToMatch('dist/test-project/index.html', oneLineTrim`
+    <script type="text/javascript" src="runtime.js"></script>
+    <script type="text/javascript" src="polyfills.js"></script>
+    <script type="text/javascript" src="styles.js"></script>
+    <script type="text/javascript" src="vendor.js"></script>
+    <script type="text/javascript" src="main.js"></script>
+  `);
+
+  await ng('build', `--es5BrowserSupport`);
+  await expectFileToMatch('dist/test-project/es2015-polyfills.js', 'core-js');
+  await expectFileToMatch('dist/test-project/index.html', oneLineTrim`
+    <script type="text/javascript" src="runtime.js"></script>
+    <script type="text/javascript" src="es2015-polyfills.js" nomodule></script>
+    <script type="text/javascript" src="polyfills.js"></script>
+    <script type="text/javascript" src="styles.js"></script>
+    <script type="text/javascript" src="vendor.js"></script>
+    <script type="text/javascript" src="main.js"></script>
+  `);
+}