Check that interface constructors and default class constructors are compatible.

compiler/javatests/com/google/dart/compiler/CompilerTestCase.java

Index: compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
diff --git a/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java b/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
index 3c2cd900ba6edcd21be9322fa86c20cc1e1d269b..21e9f2b83f5e5660c10323b51594cd6efa2e172c 100644
--- a/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
+++ b/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
@@ -6,6 +6,10 @@ package com.google.dart.compiler;
 
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
+import com.google.dart.compiler.ast.DartInvocation;
+import com.google.dart.compiler.ast.DartNewExpression;
+import com.google.dart.compiler.ast.DartNode;
+import com.google.dart.compiler.ast.DartNodeTraverser;
 import com.google.dart.compiler.ast.DartUnit;
 import com.google.dart.compiler.ast.LibraryUnit;
 import com.google.dart.compiler.parser.DartParser;
@@ -103,6 +107,10 @@ public abstract class CompilerTestCase extends TestCase {
       return compilationErrors;
     }
 
+    public List<DartCompilationError> getTypeErrors() {
+      return typeErrors;
+    }
+
     /**
      * @param lib
      */
@@ -343,4 +351,22 @@ public abstract class CompilerTestCase extends TestCase {
       }
     }
   }
+
+  /**
+   * @return the {@link DartInvocation} with given source. This is inaccurate approach, but good
+   *         enough for specific tests.
+   */
+  protected static DartNewExpression findNewExpression(DartNode rootNode, final String sampleSource) {
+    final DartNewExpression result[] = new DartNewExpression[1];
+    rootNode.accept(new DartNodeTraverser<Void>() {

[zundel, 2011/12/05 21:26:45]

To simplify, you can make DartNodeTraverser<DartNewExpression>
and then just return it directly

return rootNode.accept(new DartNodeTraverser<DartNewExpression>...

See MemberBuilder.buildConstructor()

[scheglov, 2011/12/06 14:20:39]

Does not work because of limitations of DartNodeTraverser.

+      @Override
+      public Void visitNewExpression(DartNewExpression node) {
+        if (node.toSource().equals(sampleSource)) {
+          result[0] = node;
+        }
+        return super.visitInvocation(node);
+      }
+    });
+    return result[0];
+  }
 }