Add Dart_PropagateError.

runtime/vm/dart_api_impl_test.cc

Index: runtime/vm/dart_api_impl_test.cc
===================================================================
--- runtime/vm/dart_api_impl_test.cc	(revision 3804)
+++ runtime/vm/dart_api_impl_test.cc	(working copy)
@@ -59,6 +59,68 @@
   EXPECT_VALID(Dart_ErrorGetStacktrace(exception));
 }
 
+
+void PropagateErrorNative(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_Handle closure = Dart_GetNativeArgument(args, 0);
+  EXPECT(Dart_IsClosure(closure));
+  Dart_Handle result = Dart_InvokeClosure(closure, 0, NULL);
+  EXPECT(Dart_IsError(result));
+  result = Dart_PropagateError(result);
+  EXPECT_VALID(result);  // We do not expect to reach here.
+  UNREACHABLE();
+}
+
+
+static Dart_NativeFunction PropagateError_native_lookup(
+    Dart_Handle name, int argument_count) {
+  return reinterpret_cast<Dart_NativeFunction>(&PropagateErrorNative);
+}
+
+
+TEST_CASE(Dart_PropagateError) {
+  const char* kScriptChars =
+      "class Test {\n"
+      "  static void raiseCompileError() {\n"
+      "    return badIdent;\n"
+      "  }\n"
+      "\n"
+      "  static void throwException() {\n"
+      "    throw new Exception('myException');\n"
+      "  }\n"
+      "  static void nativeFunc(closure) native 'Test_nativeFunc';\n"
+      "\n"
+      "  static void Func1() {\n"
+      "    nativeFunc(() => raiseCompileError());\n"
+      "  }\n"
+      "\n"
+      "  static void Func2() {\n"
+      "    nativeFunc(() => throwException());\n"
+      "  }\n"
+      "}\n";
+  Dart_Handle lib = TestCase::LoadTestScript(
+      kScriptChars, &PropagateError_native_lookup);
+  Dart_Handle result;
+
+  result = Dart_InvokeStatic(lib,
+                             Dart_NewString("Test"),
+                             Dart_NewString("Func1"),
+                             0,
+                             NULL);
+  EXPECT(Dart_IsError(result));
+  EXPECT(!Dart_ErrorHasException(result));
+  EXPECT_SUBSTRING("badIdent", Dart_GetError(result));
+
+  result = Dart_InvokeStatic(lib,
+                             Dart_NewString("Test"),
+                             Dart_NewString("Func2"),
+                             0,
+                             NULL);
+  EXPECT(Dart_IsError(result));
+  EXPECT(Dart_ErrorHasException(result));
+  EXPECT_SUBSTRING("myException", Dart_GetError(result));
+}
+
 #endif