Mojo: Add a Mojo-specific multiprocess test base class.

mojo/common/test/multiprocess_test_base_unittest.cc

Index: mojo/common/test/multiprocess_test_base_unittest.cc
diff --git a/mojo/common/test/multiprocess_test_base_unittest.cc b/mojo/common/test/multiprocess_test_base_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..681d8bc453bb5055d6fef384f24c28a4efe8bee6
--- /dev/null
+++ b/mojo/common/test/multiprocess_test_base_unittest.cc
@@ -0,0 +1,29 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/common/test/multiprocess_test_base.h"
+
+namespace mojo {
+namespace {
+
+class MultiprocessTestBaseTest : public test::MultiprocessTestBase {
+};
+
+TEST_F(MultiprocessTestBaseTest, RunChild) {
+  StartChild("RunChild");
+  EXPECT_EQ(123, WaitForChildShutdown());
+}
+
+MOJO_MULTIPROCESS_TEST_CHILD_MAIN(RunChild) {
+  return 123;
+}
+
+TEST_F(MultiprocessTestBaseTest, TestChildMainNotFound) {
+  StartChild("NoSuchTestChildMain");
+  int result = WaitForChildShutdown();
+  EXPECT_FALSE(result >= 0 && result <= 127);
+}
+
+}  // namespace
+}  // namespace mojo