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diff --git a/artd/testing.h b/artd/testing.h
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+++ b/artd/testing.h
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+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_ARTD_TESTING_H_
+#define ART_ARTD_TESTING_H_
+
+// Returns the value of the given `android::base::Result`, or reports the error as a gMock matcher
+// mismatch. This is only to be used in a gMock matcher.
+#define OR_MISMATCH(expr)                          \
+  ({                                               \
+    decltype(expr)&& tmp__ = (expr);               \
+    if (!tmp__.ok()) {                             \
+      *result_listener << tmp__.error().message(); \
+      return false;                                \
+    }                                              \
+    std::move(tmp__).value();                      \
+  })
+
+// Returns the value of the given `android::base::Result`, or fails the GoogleTest.
+#define OR_FAIL(expr)                                   \
+  ({                                                    \
+    decltype(expr)&& tmp__ = (expr);                    \
+    ASSERT_TRUE(tmp__.ok()) << tmp__.error().message(); \
+    std::move(tmp__).value();                           \
+  })
+
+#endif  // ART_ARTD_TESTING_H_