Adding Angular and dependent packages for testing

third_party/pkg/angular/test/io/template_cache_generator_spec.dart

+library ng.tool.template_cache_generator_spec;
+
+import 'dart:async';
+import 'dart:io';
+
+import 'package:angular/tools/template_cache_generator.dart' as generator;
+import '../jasmine_syntax.dart';
+import 'package:unittest/unittest.dart';
+
+main() => describe('template_cache_generator', () {
+  it('should correctly generate the templates cache file', () {
+    var tmpDir = Directory.systemTemp.createTempSync();
+    Future flush;
+    try {
+      flush = generator.main(['test/io/test_files/templates/main.dart',
+                      '${tmpDir.path}/generated.dart', 'generated', '%SYSTEM_PACKAGE_ROOT%',
+                      'test/io/test_files,rewritten', 'MyComponent3']);
+    } catch(_) {
+      tmpDir.deleteSync(recursive: true);
+      rethrow;
+    }
+    return flush.then((_) {
+      expect(new File('${tmpDir.path}/generated.dart').readAsStringSync(),
+          '// GENERATED, DO NOT EDIT!\n'
+         'library generated;\n'
+         '\n'
+         'import \'package:angular/angular.dart\';\n'
+         '\n'
+         'primeTemplateCache(TemplateCache tc) {\n'
+         'tc.put("rewritten/templates/main.html", new HttpResponse(200, r"""Hello World!"""));\n'
+         '}');
+    }).whenComplete(() {
+      tmpDir.deleteSync(recursive: true);
+    });
+  });
+});