fix(transformer): Fix string interpolation for bindings.

Previously it did not stringify properties and used `+` instead of ` `.

modules/angular2/src/transform/bind_generator/generator.dart

@@ -111,4 +111,3 @@ Map<String, String> _createEventsMap(NgDeps ngDeps) {
   });
   return bindMap;
 }
-

modules/angular2/src/transform/bind_generator/visitor.dart

@@ -6,8 +6,8 @@ import 'package:angular2/src/transform/common/logging.dart';
 /// Visitor responsible for crawling the "annotations" value in a
 /// `registerType` call and pulling out the properties of any "bind"
 /// values found.
-class ExtractNamedExpressionVisitor extends Object with
-    RecursiveAstVisitor<Object> {
+class ExtractNamedExpressionVisitor extends Object
+    with RecursiveAstVisitor<Object> {
   final ConstantEvaluator _evaluator = new ConstantEvaluator();
   final List<String> bindConfig = [];
   final String nameToExtract;

modules/angular2/src/transform/common/options.dart

@@ -61,8 +61,7 @@ class TransformerOptions {
       MirrorMode mirrorMode: MirrorMode.none, bool initReflector: true,
       List<AnnotationDescriptor> customAnnotationDescriptors: const [],
       int optimizationPhases: DEFAULT_OPTIMIZATION_PHASES,
-      bool inlineViews: true,
-      bool generateChangeDetectors: true}) {
+      bool inlineViews: true, bool generateChangeDetectors: true}) {
     if (reflectionEntryPoints == null || reflectionEntryPoints.isEmpty) {
       reflectionEntryPoints = entryPoints;
     }

modules/angular2/src/transform/reflection_remover/codegen.dart

@@ -16,8 +16,9 @@ class Codegen {
   Codegen(String reflectionEntryPointPath, Iterable<String> newEntryPointPaths,
       {String prefix})
       : this.prefix = prefix == null ? _PREFIX_BASE : prefix,
-        importUris = newEntryPointPaths.map((p) =>
-            path.relative(p, from: path.dirname(reflectionEntryPointPath)).replaceAll('\\', '/')) {
+        importUris = newEntryPointPaths.map((p) => path
+            .relative(p, from: path.dirname(reflectionEntryPointPath))
+            .replaceAll('\\', '/')) {
     if (this.prefix.isEmpty) throw new ArgumentError.value('(empty)', 'prefix');
   }
 

modules/angular2/src/transform/reflection_remover/rewriter.dart

@@ -113,7 +113,9 @@ class Rewriter {
 
   String _importDebugReflectionCapabilities(ImportDirective node) {
     var uri = '${node.uri}';
-    uri = path.join(path.dirname(uri), 'debug_${path.basename(uri)}').replaceAll('\\', '/');
+    uri = path
+        .join(path.dirname(uri), 'debug_${path.basename(uri)}')
+        .replaceAll('\\', '/');
     var asClause = node.prefix != null ? ' as ${node.prefix}' : '';
     return 'import $uri$asClause;';
   }

modules/angular2/src/transform/template_compiler/change_detector_codegen.dart

@@ -424,7 +424,9 @@ class _CodegenState {
   String _genInterpolation(ProtoRecord r) {
     var res = new StringBuffer();
     for (var i = 0; i < r.args.length; ++i) {
-      res.write('${JSON.encode(r.fixedArgs[i])} + ${_localNames[r.args[i]]} +');
+      var name = _localNames[r.args[i]];
+      res.write(
+          '${JSON.encode(r.fixedArgs[i])} "\$\{$name == null ? "" : $name\}" ');
     }
     res.write(JSON.encode(r.fixedArgs[r.args.length]));
     return '$res';

modules/angular2/test/transform/bind_generator/all_tests.dart

@@ -41,10 +41,10 @@ void allTests() {
       () async {
     var inputPath = 'bind_generator/events_files/bar.ng_deps.dart';
     var expected = formatter.format(
-      readFile('bind_generator/events_files/expected/bar.ng_deps.dart'));
+        readFile('bind_generator/events_files/expected/bar.ng_deps.dart'));
 
     var output = formatter.format(
-      await createNgSettersAndGetters(reader, new AssetId('a', inputPath)));
+        await createNgSettersAndGetters(reader, new AssetId('a', inputPath)));
     expect(output).toEqual(expected);
   });
 }

modules/angular2/test/transform/bind_generator/events_files/bar.ng_deps.dart

@@ -13,7 +13,7 @@ void initReflector(reflector) {
       'parameters': const [],
       'annotations': const [
         const Directive(
-            selector: '[tool-tip]',  events: ['onOpen', 'close: onClose'])
+            selector: '[tool-tip]', events: ['onOpen', 'close: onClose'])
       ]
     });
 }

modules/angular2/test/transform/directive_processor/all_tests.dart

@@ -121,8 +121,8 @@ void _testNgDeps(String name, String inputPath,
     if (output == null) {
       expect(await reader.hasInput(expectedId)).toBeFalse();
     } else {
-      expect(formatter.format(output))
-          .toEqual((await reader.readAsString(expectedId)).replaceAll('\r\n', '\n'));
+      expect(formatter.format(output)).toEqual(
+          (await reader.readAsString(expectedId)).replaceAll('\r\n', '\n'));
     }
 
     if (expectedLogs != null) {

modules/angular2/test/transform/directive_processor/invalid_url_files/hello.dart

@@ -1,13 +1,10 @@
 library test.transform.directive_processor.url_expression_files.hello;
 
 import 'package:angular2/angular2.dart'
-show bootstrap, Component, Directive, View, NgElement;
+    show bootstrap, Component, Directive, View, NgElement;
 
 @Component(selector: 'hello-app')
 @View(
     templateUrl: '/bad/absolute/url.html',
-    styleUrls: const [
-      'package:invalid/package.css',
-      'bad_relative_url.css'
-    ])
+    styleUrls: const ['package:invalid/package.css', 'bad_relative_url.css'])
 class HelloCmp {}

modules/angular2/test/transform/integration/two_annotations_files/bar.dart

@@ -4,7 +4,9 @@ import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'package:angular2/src/core/annotations_impl/view.dart';
 
 @Component(selector: '[soup]')
-@View(template: 'Salad')
+@View(template: 'Salad: {{myNum}} is awesome')
 class MyComponent {
+  int myNum;
+
   MyComponent();
 }

modules/angular2/test/transform/integration/two_annotations_files/expected/bar.ng_deps.dart

@@ -17,9 +17,11 @@ void initReflector(reflector) {
       'parameters': const [],
       'annotations': const [
         const Component(selector: '[soup]'),
-        const View(template: 'Salad')
+        const View(template: 'Salad: {{myNum}} is awesome')
       ]
-    });
+    })
+    ..registerGetters({'myNum': (o) => o.myNum})
+    ..registerSetters({'myNum': (o, v) => o.myNum = v});
   _gen.preGeneratedProtoDetectors['MyComponent_comp_0'] =
       _MyComponent_ChangeDetector0.newProtoChangeDetector;
 }
@@ -31,6 +33,8 @@ class _MyComponent_ChangeDetector0 extends _gen.AbstractChangeDetector {
   dynamic _locals = null;
   dynamic _alreadyChecked = false;
   MyComponent _context = null;
+  dynamic _myNum0 = _gen.ChangeDetectionUtil.uninitialized();
+  dynamic _interpolate1 = _gen.ChangeDetectionUtil.uninitialized();
 
   _MyComponent_ChangeDetector0(this._dispatcher, this._pipeRegistry,
       this._protos, this._directiveRecords)
@@ -41,12 +45,44 @@ class _MyComponent_ChangeDetector0 extends _gen.AbstractChangeDetector {
       _gen.ChangeDetectionUtil.throwDehydrated();
     }
     var context = null;
+    var myNum0 = null;
+    var interpolate1 = null;
     var change_context = false;
+    var change_myNum0 = false;
+    var change_interpolate1 = false;
     var isChanged = false;
     var currentProto;
     var changes = null;
 
     context = _context;
+    currentProto = _protos[0];
+    myNum0 = context.myNum;
+    if (!_gen.looseIdentical(myNum0, _myNum0)) {
+      change_myNum0 = true;
+
+      _myNum0 = myNum0;
+    }
+    if (change_myNum0) {
+      currentProto = _protos[1];
+      interpolate1 = "Salad: " "${myNum0 == null ? "" : myNum0}" " is awesome";
+      if (!_gen.looseIdentical(interpolate1, _interpolate1)) {
+        change_interpolate1 = true;
+        if (throwOnChange) {
+          _gen.ChangeDetectionUtil.throwOnChange(currentProto,
+              _gen.ChangeDetectionUtil.simpleChange(
+                  _interpolate1, interpolate1));
+        }
+
+        _dispatcher.notifyOnBinding(currentProto.bindingRecord, interpolate1);
+
+        _interpolate1 = interpolate1;
+      }
+    } else {
+      interpolate1 = _interpolate1;
+    }
+    changes = null;
+
+    isChanged = false;
 
     _alreadyChecked = true;
   }
@@ -65,6 +101,8 @@ class _MyComponent_ChangeDetector0 extends _gen.AbstractChangeDetector {
 
   void dehydrate() {
     _context = null;
+    _myNum0 = _gen.ChangeDetectionUtil.uninitialized();
+    _interpolate1 = _gen.ChangeDetectionUtil.uninitialized();
     _locals = null;
   }