add GoogleTest gtest-1.7.0 and simple hello_gtest (preparation for unit tests)

Test/hello_gtest/main.cpp

@@ -0,0 +1,38 @@
+/////////////////////////////
+// In the header file
+
+
+#include <sstream>
+using namespace std;
+
+class Salutation
+{
+public:
+  static string greet(const string& name);
+};
+
+///////////////////////////////////////
+// In the class implementation file
+
+string Salutation::greet(const string& name) {
+  ostringstream s;
+  s << "Hello " << name << "!";
+  return s.str();
+}
+
+///////////////////////////////////////////
+// In the test file
+#include <gtest/gtest.h>
+
+TEST(SalutationTest, Static) {
+  EXPECT_EQ(string("Hello World!"), Salutation::greet("World"));
+}
+
+int main(int argc, char **argv) {
+#if _MSC_VER
+        _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
+        //void *testWhetherMemoryLeakDetectionWorks = malloc(1);
+#endif
+        ::testing::InitGoogleTest(&argc, argv);
+        return RUN_ALL_TESTS();
+}