Windows: Write test name in debug log.

src/tests/test_utils/ANGLETest.cpp

+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ANGLETest:
+//   Implementation of common ANGLE testing fixture.
+//
+
 #include "ANGLETest.h"
 #include "EGLWindow.h"
 #include "OSWindow.h"
+#include "system_utils.h"
 
 ANGLETest::ANGLETest()
     : mEGLWindow(nullptr),
@@ -47,10 +57,16 @@ void ANGLETest::SetUp()
     // taking OpenGL traces can guess the size of the default framebuffer and show it
     // in their UIs
     glViewport(0, 0, mWidth, mHeight);
+
+    const auto &info = testing::UnitTest::GetInstance()->current_test_info();
+    angle::WriteDebugMessage("Entering %s.%s\n", info->test_case_name(), info->name());
 }
 
 void ANGLETest::TearDown()
 {
+    const auto &info = testing::UnitTest::GetInstance()->current_test_info();
+    angle::WriteDebugMessage("Exiting %s.%s\n", info->test_case_name(), info->name());
+
     swapBuffers();
     mOSWindow->messageLoop();
 

src/tests/test_utils/ANGLETest.h

@@ -3,6 +3,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
+// ANGLETest:
+//   Implementation of common ANGLE testing fixture.
+//
 
 #ifndef ANGLE_TESTS_ANGLE_TEST_H_
 #define ANGLE_TESTS_ANGLE_TEST_H_

util/posix/Posix_system_utils.cpp

@@ -41,4 +41,9 @@ void SetLowPriorityProcess()
     setpriority(PRIO_PROCESS, getpid(), 10);
 }
 
+void WriteDebugMessage(const char *format, ...)
+{
+    // TODO(jmadill): Implement this
+}
+
 } // namespace angle

util/system_utils.h

@@ -22,6 +22,9 @@ void Sleep(unsigned int milliseconds);
 
 void SetLowPriorityProcess();
 
+// Write a debug message, either to a standard output or Debug window.
+void WriteDebugMessage(const char *format, ...);
+
 } // namespace angle
 
 #endif // SAMPLE_UTIL_PATH_UTILS_H

util/windows/Windows_system_utils.cpp

@@ -8,8 +8,10 @@
 
 #include "system_utils.h"
 
+#include <stdarg.h>
 #include <windows.h>
 #include <array>
+#include <vector>
 
 namespace angle
 {
@@ -34,4 +36,19 @@ void Sleep(unsigned int milliseconds)
     ::Sleep(static_cast<DWORD>(milliseconds));
 }
 
+void WriteDebugMessage(const char *format, ...)
+{
+    va_list args;
+    va_start(args, format);
+    int size = vsnprintf(nullptr, 0, format, args);
+    va_end(args);
+
+    std::vector<char> buffer(size + 2);
+    va_start(args, format);
+    vsnprintf(buffer.data(), size + 1, format, args);
+    va_end(args);
+
+    OutputDebugStringA(buffer.data());
+}
+
 }  // namespace angle