fix(@schematics/angular): remove angularCli in Karma when updating

Author: Teamop

packages/schematics/angular/migrations/update-6/index.ts

@@ -78,6 +78,7 @@ function migrateKarmaConfiguration(config: CliConfig): Rule {
  content = content.replace(`{ pattern: './src/test.ts', watched: false }`, '');
  content = content.replace(`'./src/test.ts': ['@angular/cli'],`, '');
  content = content.replace(`'./src/test.ts': ['@angular/cli']`, '');
+ content = content.replace(/angularCli[^}]*},?/, '');
  // Replace 1.x plugin names.
  content = content.replace(/@angular\/cli/g, '@angular-devkit/build-angular');
  // Replace code coverage output path.

packages/schematics/angular/migrations/update-6/index_spec.ts

@@ -682,13 +682,17 @@ describe('Migration to v6', () => {
  preprocessors: {
  './src/test.ts': ['@angular/cli']
  },
+ angularCli: {
+ environment: 'dev'
+ },
  `);
 
  tree.create(oldConfigPath, JSON.stringify(baseConfig, null, 2));
  tree = schematicRunner.runSchematic('migration-01', defaultOptions, tree);
  const content = tree.readContent(karmaPath);
  expect(content).not.toContain(`{ pattern: './src/test.ts', watched: false }`);
  expect(content).not.toContain(`'./src/test.ts': ['@angular/cli']`);
+ expect(content).not.toMatch(/angularCli[^}]*},?/);
  });
  });