Issue 8006. Allow abstract modifier for typedef mixin applications.

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

Index: compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
diff --git a/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java b/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
index 3e070aa1f30df48360a0addc9deefed8d78b7d1e..d86da206f6d50f323e9c13e2311f611a988340bf 100644
--- a/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
+++ b/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
@@ -14,6 +14,7 @@ import com.google.dart.compiler.ast.DartBinaryExpression;
 import com.google.dart.compiler.ast.DartBooleanLiteral;
 import com.google.dart.compiler.ast.DartCascadeExpression;
 import com.google.dart.compiler.ast.DartClass;
+import com.google.dart.compiler.ast.DartClassTypeAlias;
 import com.google.dart.compiler.ast.DartComment;
 import com.google.dart.compiler.ast.DartExprStmt;
 import com.google.dart.compiler.ast.DartExpression;
@@ -115,6 +116,33 @@ public class SyntaxTest extends AbstractParserTest {
     assertEquals("D", mixins.get(1).toString());
   }
 
+  public void test_parseTypedefMixin() throws Exception {
+    parseUnit(
+        "test.dart",
+        Joiner.on("\n").join(
+            "// filler filler filler filler filler filler filler filler filler filler",
+            "typedef C = A with B;",
+            ""));
+    DartClassTypeAlias typedef = findNode(DartClassTypeAlias.class, "typedef C");
+    assertEquals("A", typedef.getSuperclass().toString());
+    {
+      NodeList<DartTypeNode> mixins = typedef.getMixins();
+      assertEquals(1, mixins.size());
+      assertEquals("B", mixins.get(0).toString());
+    }
+  }
+  
+  public void test_parseTypedefMixin_abstract() throws Exception {
+    parseUnit(
+        "test.dart",
+        Joiner.on("\n").join(
+            "// filler filler filler filler filler filler filler filler filler filler",
+            "typedef C = abstract A with B;",
+            ""));
+    DartClassTypeAlias typedef = findNode(DartClassTypeAlias.class, "typedef C");
+    assertTrue(typedef.getModifiers().isAbstract());
+  }
+
   /**
    * <p>
    * http://code.google.com/p/dart/issues/detail?id=6881