Resolve initializers in constructors.

frog/tests/leg/src/mock_compiler.dart

Index: frog/tests/leg/src/mock_compiler.dart
diff --git a/frog/tests/leg/src/mock_compiler.dart b/frog/tests/leg/src/mock_compiler.dart
index e7b2189f6529e5ec04f42b1c5aafb56f9306d951..354985fca0c4f2bec998aab1641d1e6a8f2c4a33 100644
--- a/frog/tests/leg/src/mock_compiler.dart
+++ b/frog/tests/leg/src/mock_compiler.dart
@@ -14,6 +14,8 @@ class WarningMessage {
   Node node;
   Message message;
   WarningMessage(this.node, this.message);
+
+  toString() => message.toString();
 }
 
 final String DEFAULT_CORELIB = @'''
@@ -95,3 +97,23 @@ class MockCompiler extends Compiler {
   }
 }
 
+void compareWarningKinds(String text, expectedWarnings, foundWarnings) {
+  var fail = (message) => Expect.fail('$text: $message');
+  Iterator<MessageKind> expected = expectedWarnings.iterator();
+  Iterator<WarningMessage> found = foundWarnings.iterator();
+  while (expected.hasNext() && found.hasNext()) {
+    Expect.equals(expected.next(), found.next().message.kind);
+  }
+  if (expected.hasNext()) {
+    do {
+      print('Expected warning "${expected.next()}" did not occur');
+    } while (expected.hasNext());
+    fail('Too few warnings');
+  }
+  if (found.hasNext()) {
+    do {
+      print('Additional warning "${found.next()}"');
+    } while (found.hasNext());
+    fail('Too many warnings');
+  }
+}