test(@angular/cli): extract version specifier e2e test

(cherry picked from commit d081974)

Author: alan-agius4

tests/legacy-cli/e2e/tests/commands/add/add-material.ts

@@ -21,27 +21,7 @@ export default async function () {
   await ng('add',  `@angular/material${tag}`, '--theme', 'custom', '--verbose');
   await expectFileToMatch('package.json', /@angular\/material/);
 
-  const output1 = await ng('add', '@angular/material');
-  if (!output1.stdout.includes('Skipping installation: Package already installed')) {
-    throw new Error('Installation was not skipped');
-  }
-
   // Clean up existing cdk package
   // Not doing so can cause adding material to fail if an incompatible cdk is present
   await uninstallPackage('@angular/cdk');
-
-  const output2 = await ng('add', '@angular/material@latest');
-  if (output2.stdout.includes('Skipping installation: Package already installed')) {
-    throw new Error('Installation should not have been skipped');
-  }
-
-  const output3 = await ng('add', '@angular/material@8.0.0');
-  if (output3.stdout.includes('Skipping installation: Package already installed')) {
-    throw new Error('Installation should not have been skipped');
-  }
-
-  const output4 = await ng('add', '@angular/material@8');
-  if (!output4.stdout.includes('Skipping installation: Package already installed')) {
-    throw new Error('Installation was not skipped');
-  }
 }

tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts

@@ -3,16 +3,16 @@ import { expectFileToExist, readFile, rimraf } from '../../../utils/fs';
 import { ng } from '../../../utils/process';
 
 export default async function () {
-    // forcibly remove in case another test doesn't clean itself up
-    await rimraf('node_modules/@angular/pwa');
-    await ng('add', '@angular/pwa');
-    await expectFileToExist(join(process.cwd(), 'src/manifest.webmanifest'));
+  // forcibly remove in case another test doesn't clean itself up
+  await rimraf('node_modules/@angular/pwa');
+  await ng('add', '@angular/pwa');
+  await expectFileToExist(join(process.cwd(), 'src/manifest.webmanifest'));
 
-    // Angular PWA doesn't install as a dependency
-    const { dependencies, devDependencies } = JSON.parse(await readFile(join(process.cwd(), 'package.json')));
-    const hasPWADep = Object.keys({ ...dependencies, ...devDependencies })
-        .some(d => d === '@angular/pwa');
-    if (hasPWADep) {
-        throw new Error(`Expected 'package.json' not to contain a dependency on '@angular/pwa'.`);
-    }
+  // Angular PWA doesn't install as a dependency
+  const { dependencies, devDependencies } = JSON.parse(await readFile(join(process.cwd(), 'package.json')));
+  const hasPWADep = Object.keys({ ...dependencies, ...devDependencies })
+    .some(d => d === '@angular/pwa');
+  if (hasPWADep) {
+    throw new Error(`Expected 'package.json' not to contain a dependency on '@angular/pwa'.`);
+  }
 }

tests/legacy-cli/e2e/tests/commands/add/version-specifier.ts

@@ -0,0 +1,37 @@
+import { expectFileToMatch, rimraf } from '../../../utils/fs';
+import { uninstallPackage } from '../../../utils/packages';
+import { ng } from '../../../utils/process';
+import { isPrereleaseCli } from '../../../utils/project';
+
+
+export default async function () {
+  // forcibly remove in case another test doesn't clean itself up.
+  await rimraf('node_modules/@angular/localize');
+
+  const tag = await isPrereleaseCli() ?  '@next' : '';
+
+  await ng('add',  `@angular/localize${tag}`);
+  await expectFileToMatch('package.json', /@angular\/localize/);
+
+  const output1 = await ng('add', '@angular/localize');
+  if (!output1.stdout.includes('Skipping installation: Package already installed')) {
+    throw new Error('Installation was not skipped');
+  }
+
+  const output2 = await ng('add', '@angular/localize@latest');
+  if (output2.stdout.includes('Skipping installation: Package already installed')) {
+    throw new Error('Installation should not have been skipped');
+  }
+
+  const output3 = await ng('add', '@angular/localize@10.0.0');
+  if (output3.stdout.includes('Skipping installation: Package already installed')) {
+    throw new Error('Installation should not have been skipped');
+  }
+
+  const output4 = await ng('add', '@angular/localize@10');
+  if (!output4.stdout.includes('Skipping installation: Package already installed')) {
+    throw new Error('Installation was not skipped');
+  }
+
+  await uninstallPackage('@angular/localize');
+}