command_buffer_gles2: Add test command_buffer_gles2_test for command_buffer_gles2

Add test command_buffer_gles2_test for testing command_buffer_gles2
library.

Makes the gpu bots to build target, but the target is not run
on any bot.

As an example, fix a potential nullptr reference in eglInitialize
and tests the problem.

Adding the test runner would be useful in order to further develop
command_buffer_gles2. One development direction of the library
would be to extend it enough to support creating OpenGL ES 3.0
context.

BUG=581634

Committed: https://crrev.com/ee2d13a54fc1de09762f1e5be97d6db44235fa80
Cr-Commit-Position: refs/heads/master@{#374353}
CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_optional_gpu_tests_rel

Review URL: https://codereview.chromium.org/1640243002

Cr-Commit-Position: refs/heads/master@{#375420}

2 files changed, 103 insertions, 0 deletions

diff --git a/gpu/command_buffer/tests/command_buffer_gles2_tests_main.cc b/gpu/command_buffer/tests/command_buffer_gles2_tests_main.cc
new file mode 100644
index 0000000..f945390
--- /dev/null
+++ b/gpu/command_buffer/tests/command_buffer_gles2_tests_main.cc
@@ -0,0 +1,67 @@
+// Copyright (c) 2012 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 "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#if defined(OS_MACOSX)
+#include "base/mac/scoped_nsautorelease_pool.h"
+#endif
+#include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_suite.h"
+#include "gpu/gles2_conform_support/egl/test_support.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+// This file implements the main entry point for tests for command_buffer_gles2,
+// the mode of command buffer where the code is compiled as a standalone dynamic
+// library and exposed through EGL API.
+namespace {
+
+int RunHelper(base::TestSuite* testSuite) {
+#if defined(USE_OZONE)
+  base::MessageLoopForUI main_loop;
+#else
+  base::MessageLoopForIO message_loop;
+#endif
+  return testSuite->Run();
+}
+
+}  // namespace
+
+int main(int argc, char** argv) {
+// NOTE: we initialize globals through TestSuite constructor or through JNI
+// library registration process on Android.
+
+// However, when the system is compiled with component build,
+// command_buffer_gles2 library and this test runner share the globals, such
+// as AtExitManager and JVM references.  When command_buffer_gles2 is run with
+// the test runner, the globals may be populated.  Any other app linking to
+// command_buffer_gles2 of course can not provide the globals.
+
+// When the system is compiled without component build, command_buffer_gles2
+// gets its own globals, while the test runner gets its own. The runner
+// initialize different global variables than the ones command_buffer_gles2
+// library uses. For example, there should be a global AtExitManager for the
+// test runner, and there should be a global AtExitManager that the library
+// uses. Similarly, if the test runner would use JNI, it should have global
+// reference to the JNI environent. If the command_buffer_gles2 library would
+// use JNI, it should have its own global reference to the JNI that always
+// remains null. The reference of the library should always stay null, since
+// JNI is not part of command_buffer_gles2 exported API (EGL API), and thus
+// there is no way for the client of the library to populate the JNI
+// pointer. The client may not even be a Java app.
+
+// We signify that the globals have been initialized when running
+// the component build.
+#if defined(COMPONENT_BUILD)
+  g_command_buffer_gles_has_atexit_manager = true;
+#endif
+
+  base::TestSuite test_suite(argc, argv);
+#if defined(OS_MACOSX)
+  base::mac::ScopedNSAutoreleasePool pool;
+#endif
+  testing::InitGoogleMock(&argc, argv);
+  return base::LaunchUnitTestsSerially(
+      argc, argv, base::Bind(&RunHelper, base::Unretained(&test_suite)));
+}
diff --git a/gpu/command_buffer/tests/egl_test.cc b/gpu/command_buffer/tests/egl_test.cc
new file mode 100644
index 0000000..bf7e30e
--- /dev/null
+++ b/gpu/command_buffer/tests/egl_test.cc
@@ -0,0 +1,36 @@
+// Copyright 2015 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 "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include <EGL/egl.h>
+
+// This file tests EGL basic interface for command_buffer_gles2, the mode of
+// command buffer where the code is compiled as a standalone dynamic library and
+// exposed through EGL API.
+namespace gpu {
+
+using testing::Test;
+
+TEST_F(Test, BasicEGLInitialization) {
+  EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+  ASSERT_NE(display, EGL_NO_DISPLAY);
+
+  // Test for no crash even though passing nullptrs for major, minor.
+  EGLBoolean success = eglInitialize(display, nullptr, nullptr);
+  ASSERT_TRUE(success);
+
+  EGLint major = 0;
+  EGLint minor = 0;
+  success = eglInitialize(display, &major, &minor);
+  ASSERT_TRUE(success);
+  ASSERT_EQ(major, 1);
+  ASSERT_EQ(minor, 4);
+
+  success = eglTerminate(display);
+  ASSERT_TRUE(success);
+}
+
+}  // namespace gpu