Adding Angular and dependent packages for testing

third_party/pkg/angular/test/tools/source_metadata_extractor_spec.dart

+library source_metadata_extractor_spec;
+
+import 'package:analyzer/src/generated/ast.dart';
+import 'package:angular/tools/common.dart';
+import 'package:angular/tools/source_crawler.dart';
+import 'package:angular/tools/source_metadata_extractor.dart';
+import 'package:unittest/unittest.dart';
+
+import '../jasmine_syntax.dart';
+
+main() => describe('SourceMetadataExtractor', () {
+
+  it('should extract expressions and attribute names with expressions', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('FooComponent', COMPONENT, null, {
+        'barVal': '@bar',
+        'bazExpr1': '<=>baz1',
+        'bazExpr2': '=>baz2',
+        'bazExpr3': '=>!baz3',
+        'bazCallback': '&aux',
+      })
+    ]);
+
+    expect(flattenList(info, (DirectiveInfo i) => i.expressionAttrs),
+        equals(['baz-expr1',
+                'baz-expr2',
+                'baz-expr3',
+                'baz-callback']));
+    expect(flattenList(info, (DirectiveInfo i) => i.expressions),
+        equals(['bar',
+                'baz1',
+                'baz2',
+                'baz3',
+                'aux']));
+  });
+
+  it('should build a component selector if one is not explicitly specified', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooComponent', COMPONENT, null, {
+        'foo-expr': '=>fooExpr'
+      })
+    ]);
+
+    expect(info, hasLength(1));
+    expect(info[0].selector, equals('my-foo'));
+  });
+
+  it('should build an element directive selector if one is not explicitly specified', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooDirective', DIRECTIVE, null, {
+        'foo-expr': '=>fooExpr'
+      })
+    ]);
+
+    expect(info, hasLength(1));
+    expect(info[0].selector, equals('my-foo'));
+  });
+
+  it('should build an attr directive selector if one is not explicitly specified', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooAttrDirective', DIRECTIVE, null, {
+        'foo-expr': '=>fooExpr'
+      })
+    ]);
+
+    expect(info, hasLength(1));
+    expect(info[0].selector, equals('[my-foo]'));
+  });
+
+  it('should figure out attribute name if dot(.) is used', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooAttrDirective', DIRECTIVE, null, {
+        '.': '=>fooExpr'
+      })
+    ]);
+
+    expect(flattenList(info, (DirectiveInfo i) => i.expressionAttrs),
+           equals(['my-foo']));
+  });
+
+  it('should figure out attribute name from selector if dot(.) is used', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooAttrDirective', DIRECTIVE, '[blah][foo]', {
+        '.': '=>fooExpr'
+      })
+    ]);
+
+    expect(flattenList(info, (DirectiveInfo i) => i.expressionAttrs),
+           equals(['foo']));
+  });
+
+  it('should include exported expression attributes', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooAttrDirective', DIRECTIVE, '[blah][foo]', {
+        '.': '=>fooExpr'
+      }, ['baz'])
+    ]);
+
+    expect(flattenList(info, (DirectiveInfo i) => i.expressionAttrs),
+           equals(['foo', 'baz']));
+  });
+
+  it('should include exported expressions', () {
+    var info = extractDirectiveInfo([
+      new DirectiveMetadata('MyFooAttrDirective', DIRECTIVE, '[blah][foo]', {
+        '.': '=>fooExpr'
+      }, null, ['ctrl.baz'])
+    ]);
+
+    expect(flattenList(info, (DirectiveInfo i) => i.expressions),
+           equals(['fooExpr', 'ctrl.baz']));
+  });
+
+});
+
+flattenList(list, map) => list.map(map).fold([], (prev, exprs) =>
+    new List.from(prev)..addAll(exprs));
+
+List<DirectiveInfo> extractDirectiveInfo(List<DirectiveMetadata> metadata) {
+  var sourceCrawler = new MockSourceCrawler();
+  var metadataCollector = new MockDirectiveMetadataCollectingVisitor(metadata);
+  var extractor = new SourceMetadataExtractor(sourceCrawler, metadataCollector);
+  return extractor.gatherDirectiveInfo('');
+}
+
+class MockDirectiveMetadataCollectingVisitor
+    implements DirectiveMetadataCollectingVisitor {
+  List<DirectiveMetadata> metadata;
+
+  MockDirectiveMetadataCollectingVisitor(List<DirectiveMetadata> this.metadata);
+
+  call(CompilationUnit cu) {
+    // do nothing
+  }
+}
+
+class MockSourceCrawler implements SourceCrawler {
+
+  void crawl(String entryPoint, visitor(CompilationUnit cu)) {
+    // do nothing
+  }
+}