1 files changed, 45 insertions, 0 deletions
diff --git a/netwerk/test/gtest/TestCommon.h b/netwerk/test/gtest/TestCommon.h
new file mode 100644
index 0000000000..0d2fd74e5b
--- /dev/null
+++ b/netwerk/test/gtest/TestCommon.h
@@ -0,0 +1,45 @@
+/* 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/. */
+
+#ifndef TestCommon_h__
+#define TestCommon_h__
+
+#include <stdlib.h>
+#include "nsThreadUtils.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/SpinEventLoopUntil.h"
+
+//-----------------------------------------------------------------------------
+
+class WaitForCondition final : public nsIRunnable {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  void Wait(int pending) {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(mPending == 0);
+
+    mPending = pending;
+    mozilla::SpinEventLoopUntil("TestCommon.h:WaitForCondition::Wait"_ns,
+                                [&]() { return !mPending; });
+    NS_ProcessPendingEvents(nullptr);
+  }
+
+  void Notify() { NS_DispatchToMainThread(this); }
+
+ private:
+  virtual ~WaitForCondition() = default;
+
+  NS_IMETHOD Run() override {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(mPending);
+
+    --mPending;
+    return NS_OK;
+  }
+
+  uint32_t mPending = 0;
+};
+
+#endif