feat(dart/transform): Record property metadata

Update the transformer to generate code registering annotations on class
properties, getters, and setters.

Closes #1800, #3267, #4003

modules_dart/transform/test/transform/directive_processor/all_tests.dart

@@ -292,6 +292,61 @@ void allTests() {
     });
   });
 
+  describe('property metadata', () {
+    it('should be recorded on fields', () async {
+      var model = await _testCreateModel('prop_metadata_files/fields.dart');
+
+      expect(model.reflectables.first.propertyMetadata).toBeNotNull();
+      expect(model.reflectables.first.propertyMetadata.isNotEmpty).toBeTrue();
+      expect(model.reflectables.first.propertyMetadata.first.name)
+          .toEqual('field');
+      expect(model.reflectables.first.propertyMetadata.first.annotations
+          .firstWhere((a) => a.name == 'FieldDecorator',
+              orElse: () => null)).toBeNotNull();
+    });
+
+    it('should be recorded on getters', () async {
+      var model = await _testCreateModel('prop_metadata_files/getters.dart');
+
+      expect(model.reflectables.first.propertyMetadata).toBeNotNull();
+      expect(model.reflectables.first.propertyMetadata.isNotEmpty).toBeTrue();
+      expect(model.reflectables.first.propertyMetadata.first.name)
+          .toEqual('getVal');
+      expect(model.reflectables.first.propertyMetadata.first.annotations
+              .firstWhere((a) => a.name == 'GetDecorator', orElse: () => null))
+          .toBeNotNull();
+    });
+
+    it('should be recorded on setters', () async {
+      var model = await _testCreateModel('prop_metadata_files/setters.dart');
+
+      expect(model.reflectables.first.propertyMetadata).toBeNotNull();
+      expect(model.reflectables.first.propertyMetadata.isNotEmpty).toBeTrue();
+      expect(model.reflectables.first.propertyMetadata.first.name)
+          .toEqual('setVal');
+      expect(model.reflectables.first.propertyMetadata.first.annotations
+              .firstWhere((a) => a.name == 'SetDecorator', orElse: () => null))
+          .toBeNotNull();
+    });
+
+    it('should be coalesced when getters and setters have the same name',
+        () async {
+      var model = await _testCreateModel(
+          'prop_metadata_files/getters_and_setters.dart');
+
+      expect(model.reflectables.first.propertyMetadata).toBeNotNull();
+      expect(model.reflectables.first.propertyMetadata.length).toBe(1);
+      expect(model.reflectables.first.propertyMetadata.first.name)
+          .toEqual('myVal');
+      expect(model.reflectables.first.propertyMetadata.first.annotations
+              .firstWhere((a) => a.name == 'GetDecorator', orElse: () => null))
+          .toBeNotNull();
+      expect(model.reflectables.first.propertyMetadata.first.annotations
+              .firstWhere((a) => a.name == 'SetDecorator', orElse: () => null))
+          .toBeNotNull();
+    });
+  });
+
   it('should not throw/hang on invalid urls', () async {
     var logger = new RecordingLogger();
     var model =

modules_dart/transform/test/transform/directive_processor/prop_metadata_files/fields.dart

@@ -0,0 +1,8 @@
+library fields;
+
+import 'package:angular2/src/core/metadata.dart';
+
+@Component(selector: '[fields]')
+class FieldComponent {
+  @FieldDecorator("field") String field;
+}

modules_dart/transform/test/transform/directive_processor/prop_metadata_files/getters.dart

@@ -0,0 +1,8 @@
+library fields;
+
+import 'package:angular2/src/core/metadata.dart';
+
+@Component(selector: '[getters]')
+class FieldComponent {
+  @GetDecorator("get") String get getVal => 'a';
+}

modules_dart/transform/test/transform/directive_processor/prop_metadata_files/getters_and_setters.dart

@@ -0,0 +1,10 @@
+library fields;
+
+import 'package:angular2/src/core/metadata.dart';
+
+@Component(selector: '[getters-and-setters]')
+class FieldComponent {
+  String _val;
+  @GetDecorator("get") String get myVal => _val;
+  @SetDecorator("set") String set myVal(val) => _val = val;
+}

modules_dart/transform/test/transform/directive_processor/prop_metadata_files/setters.dart

@@ -0,0 +1,8 @@
+library fields;
+
+import 'package:angular2/src/core/metadata.dart';
+
+@Component(selector: '[setters]')
+class FieldComponent {
+  @SetDecorator("set") String set setVal(val) => null;
+}