fix(transformers): Fix @Input/@Output annotations with setters/getters

Fix @Input annotations to work with setter methods in dart, and fix @Output
annotations to work with getter methods in Dart when using transformers.

Closes #5251

Closes #5259

modules_dart/transform/lib/src/transform/common/directive_metadata_reader.dart

@@ -232,21 +232,11 @@ class _DirectiveMetadataVisitor extends Object
     for (var variable in node.fields.variables) {
       for (var meta in node.metadata) {
         if (_isAnnotation(meta, 'Output')) {
-          final renamed = _getRenamedValue(meta);
-          if (renamed != null) {
-            _outputs.add('${variable.name}: ${renamed}');
-          } else {
-            _outputs.add('${variable.name}');
-          }
+          _addPropertyToType(_outputs, variable.name.toString(), meta);
         }
 
         if (_isAnnotation(meta, 'Input')) {
-          final renamed = _getRenamedValue(meta);
-          if (renamed != null) {
-            _inputs.add('${variable.name}: ${renamed}');
-          } else {
-            _inputs.add('${variable.name}');
-          }
+          _addPropertyToType(_inputs, variable.name.toString(), meta);
         }
 
         if (_isAnnotation(meta, 'HostBinding')) {
@@ -265,6 +255,14 @@ class _DirectiveMetadataVisitor extends Object
   @override
   Object visitMethodDeclaration(MethodDeclaration node) {
     for (var meta in node.metadata) {
+      if (_isAnnotation(meta, 'Output') && node.isGetter) {
+        _addPropertyToType(_outputs, node.name.toString(), meta);
+      }
+
+      if (_isAnnotation(meta, 'Input') && node.isSetter) {
+        _addPropertyToType(_inputs, node.name.toString(), meta);
+      }
+
       if (_isAnnotation(meta, 'HostListener')) {
         if (meta.arguments.arguments.length == 0 ||
             meta.arguments.arguments.length > 2) {
@@ -280,6 +278,15 @@ class _DirectiveMetadataVisitor extends Object
     return null;
   }
 
+  void _addPropertyToType(List type, String name, Annotation meta) {
+    final renamed = _getRenamedValue(meta);
+    if (renamed != null) {
+      type.add('${name}: ${renamed}');
+    } else {
+      type.add('${name}');
+    }
+  }
+
   //TODO Use AnnotationMatcher instead of string matching
   bool _isAnnotation(Annotation node, String annotationName) {
     var id = node.name;

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

@@ -498,14 +498,14 @@ void allTests() {
 
     it('should merge `outputs` from the annotation and fields.', () async {
       var model = await _testCreateModel('directives_files/components.dart');
-      expect(model.types['ComponentWithOutputs'].outputs)
-          .toEqual({'a': 'a', 'b': 'b', 'c': 'renamed'});
+      expect(model.types['ComponentWithOutputs'].outputs).toEqual(
+          {'a': 'a', 'b': 'b', 'c': 'renamed', 'd': 'd', 'e': 'get-renamed'});
     });
 
     it('should merge `inputs` from the annotation and fields.', () async {
       var model = await _testCreateModel('directives_files/components.dart');
-      expect(model.types['ComponentWithInputs'].inputs)
-          .toEqual({'a': 'a', 'b': 'b', 'c': 'renamed'});
+      expect(model.types['ComponentWithInputs'].inputs).toEqual(
+          {'a': 'a', 'b': 'b', 'c': 'renamed', 'd': 'd', 'e': 'set-renamed'});
     });
 
     it('should merge host bindings from the annotation and fields.', () async {

modules_dart/transform/test/transform/directive_processor/directives_files/components.dart

@@ -22,30 +22,41 @@ class ComponentOnly {}
 @Component(
     selector: 'component-with-outputs',
     template: '<dep1></dep1><dep2></dep2>',
-    outputs: ['a']
-)
+    outputs: ['a'])
 class ComponentWithOutputs {
   @Output() Object b;
   @Output('renamed') Object c;
+
+  Object _d;
+  @Output() Object get d => _d;
+
+  Object _e;
+  @Output('get-renamed') Object get e => _e;
 }
 
 @Component(
     selector: 'component-with-inputs',
     template: '<dep1></dep1><dep2></dep2>',
-    inputs: ['a']
-)
+    inputs: ['a'])
 class ComponentWithInputs {
   @Input() Object b;
   @Input('renamed') Object c;
+
+  Object _d;
+  @Input() void set d(Object value) {
+    _d = value;
+  }
+
+  Object _e;
+  @Input('set-renamed') void set e(Object value) {
+    _e = value;
+  }
 }
 
 @Component(
     selector: 'component-with-inputs',
     template: '<dep1></dep1><dep2></dep2>',
-    host: {
-      '[a]':'a'
-    }
-)
+    host: {'[a]': 'a'})
 class ComponentWithHostBindings {
   @HostBinding() Object b;
   @HostBinding('renamed') Object c;
@@ -54,11 +65,9 @@ class ComponentWithHostBindings {
 @Component(
     selector: 'component-with-inputs',
     template: '<dep1></dep1><dep2></dep2>',
-    host: {
-      '(a)':'onA()'
-    }
-)
+    host: {'(a)': 'onA()'})
 class ComponentWithHostListeners {
   @HostListener('b') void onB() {}
-  @HostListener('c', ['\$event.target', '\$event.target.value']) void onC(t,v) {}
+  @HostListener('c', ['\$event.target', '\$event.target.value']) void onC(
+      t, v) {}
 }