Report MAP_VALUE_TYPE_NOT_ASSIGNABLE warning/error.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
index 8e98db7bb3d653c68397c7fa226dec6458c7d2a2..c1dda081570f16841f79eca7ada7ce7b03ad0559 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
@@ -2055,6 +2055,22 @@ public class CompileTimeErrorCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_mapKeyTypeNotAssignable() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = const <String, int > {1 : 2};"));
+    resolve(source);
+    assertErrors(CompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE);
+    verify(source);
+  }
+
+  public void test_mapValueTypeNotAssignable() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = const <String, String> {'a' : 2};"));
+    resolve(source);
+    assertErrors(CompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE);
+    verify(source);
+  }
+
   public void test_memberWithClassName_field() throws Exception {
     Source source = addSource(createSource(//
         "class A {",