add EXPECT_OK and StatusIs gtest matcher

src/test/core/testing.h

@@ -0,0 +1,24 @@
+#ifndef YAZE_TEST_CORE_TESTING_H
+#define YAZE_TEST_CORE_TESTING_H
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+
+#define EXPECT_OK(expr) EXPECT_EQ((expr), absl::OkStatus())
+
+namespace yaze {
+namespace test {
+
+// StatusIs is a matcher that matches a status that has the same code and
+// message as the expected status.
+MATCHER_P(StatusIs, status, "") { 
+  return arg.code() == status;  
+}
+
+}  // namespace test
+}  // namespace yaze
+
+#endif  // YAZE_TEST_CORE_TESTING_H