Report INVALID_ASSIGNMENT if default value type cannot be assigned to the parameter type.

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

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticTypeWarningCodeTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticTypeWarningCodeTest.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticTypeWarningCodeTest.java
index 31f81e4d3e9a3e48ec521a8aa1d4d7c4008c32e8..f44cba12093d1412748900ec62bf1e7de810ffb0 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticTypeWarningCodeTest.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticTypeWarningCodeTest.java
@@ -165,6 +165,24 @@ public class StaticTypeWarningCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_invalidAssignment_defaultValue_named() throws Exception {
+    Source source = addSource(createSource(//
+        "f({String x: 0}) {",
+        "}"));
+    resolve(source);
+    assertErrors(StaticTypeWarningCode.INVALID_ASSIGNMENT);
+    verify(source);
+  }
+
+  public void test_invalidAssignment_defaultValue_optional() throws Exception {
+    Source source = addSource(createSource(//
+        "f([String x = 0]) {",
+        "}"));
+    resolve(source);
+    assertErrors(StaticTypeWarningCode.INVALID_ASSIGNMENT);
+    verify(source);
+  }
+
   public void test_invalidAssignment_instanceVariable() throws Exception {
     Source source = addSource(createSource(//
         "class A {",