Pass command line args to apptests

examples/apptest/example_apptest.cc

 // Copyright 2014 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 "examples/apptest/example_client_application.h"
 #include "examples/apptest/example_client_impl.h"
 #include "examples/apptest/example_service.mojom.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/application/application_test_base.h"
 #include "mojo/public/cpp/bindings/callback.h"
 #include "mojo/public/cpp/environment/logging.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 namespace {
 
 // Exemplifies ApplicationTestBase's application testing pattern.
 class ExampleApplicationTest : public test::ApplicationTestBase {
  public:
-  // TODO(msw): Exemplify the use of actual command line arguments.
-  ExampleApplicationTest() : ApplicationTestBase(Array<String>()) {}
+  ExampleApplicationTest() : ApplicationTestBase() {}
   ~ExampleApplicationTest() override {}
 
  protected:
   // ApplicationTestBase:
   ApplicationDelegate* GetApplicationDelegate() override {
     return &example_client_application_;
   }
   void SetUp() override {
     ApplicationTestBase::SetUp();
+
     application_impl()->ConnectToService("mojo:example_service",
                                          &example_service_);
     example_service_.set_client(&example_client_);
   }
 
   ExampleServicePtr example_service_;
   ExampleClientImpl example_client_;
 
  private:
   ExampleClientApplication example_client_application_;
@@ skipping 27 matching lines @@
 };
 
 TEST_F(ExampleApplicationTest, RunCallbackViaService) {
   // Test ExampleService callback functionality.
   bool was_run = false;
   example_service_->RunCallback(SetCallback<bool>(&was_run, true));
   EXPECT_TRUE(example_service_.WaitForIncomingMethodCall());
   EXPECT_TRUE(was_run);
 }
 
+TEST_F(ExampleApplicationTest, CheckCommandLineArg) {
+  // apptest_runner.py adds this argument unconditionally so we can check
+  // for it here to verify that command line args are getting passed to
+  // apptests.
+  ASSERT_TRUE(application_impl()->HasArg("--example_apptest_arg"));
+}
+
 }  // namespace
 }  // namespace mojo