1 files changed, 38 insertions, 0 deletions
diff --git a/testing/gtest/mozilla/MozAssertions.cpp b/testing/gtest/mozilla/MozAssertions.cpp
new file mode 100644
index 0000000000..ed9c68cb83
--- /dev/null
+++ b/testing/gtest/mozilla/MozAssertions.cpp
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MozAssertions.h"
+#include "mozilla/ErrorNames.h"
+#include "nsString.h"
+
+namespace mozilla::gtest {
+
+static testing::AssertionResult NsresultFailureHelper(const char* expr,
+                                                      const char* expected,
+                                                      nsresult rv) {
+  nsAutoCString name;
+  GetErrorName(rv, name);
+
+  return testing::AssertionFailure()
+         << "Expected: " << expr << " " << expected << ".\n"
+         << "  Actual: " << name << "\n";
+}
+
+testing::AssertionResult IsNsresultSuccess(const char* expr, nsresult rv) {
+  if (NS_SUCCEEDED(rv)) {
+    return testing::AssertionSuccess();
+  }
+  return NsresultFailureHelper(expr, "succeeds", rv);
+}
+
+testing::AssertionResult IsNsresultFailure(const char* expr, nsresult rv) {
+  if (NS_FAILED(rv)) {
+    return testing::AssertionSuccess();
+  }
+  return NsresultFailureHelper(expr, "failed", rv);
+}
+
+}  // namespace mozilla::gtest