feat(tsc-wrapped): allow values to be substituted by collector clients

Also reenabled tests that were unintentionally disabled when they were
moved from tools/@angular.

packages/tsc-wrapped/test/tsc_spec.ts

@@ -0,0 +1,54 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import * as ts from 'typescript';
+import {Tsc} from '../src/tsc';
+import {VinylFile} from '../src/vinyl_file';
+
+describe('options parsing', () => {
+
+  const configData = `
+{
+    "angularCompilerOptions": {
+        "googleClosureOutput": true
+    },
+    "compilerOptions": {
+        "module": "commonjs",
+        "outDir": "built"
+    }
+}`;
+
+  const tsc = new Tsc(() => configData, () => ['tsconfig.json']);
+  const config = {path: 'basePath/tsconfig.json', contents: new Buffer(configData)};
+
+  it('should combine all options into ngOptions', () => {
+    const {parsed, ngOptions} =
+        tsc.readConfiguration('projectDir', 'basePath', {target: ts.ScriptTarget.ES2015});
+
+    expect(ngOptions).toEqual({
+      genDir: 'basePath',
+      googleClosureOutput: true,
+      module: ts.ModuleKind.CommonJS,
+      outDir: 'basePath/built',
+      configFilePath: undefined,
+      target: ts.ScriptTarget.ES2015
+    });
+  });
+
+  it('should combine all options into ngOptions from vinyl like object', () => {
+    const {parsed, ngOptions} = tsc.readConfiguration(config as VinylFile, 'basePath');
+
+    expect(ngOptions).toEqual({
+      genDir: 'basePath',
+      googleClosureOutput: true,
+      module: ts.ModuleKind.CommonJS,
+      outDir: 'basePath/built',
+      configFilePath: undefined
+    });
+  });
+});