IVGCVSW-1987 : registry for backend creation functions (factories)

Change-Id: I13d2d3dc763e1d05dffddb34472bd4f9e632c776

1 files changed, 91 insertions, 0 deletions

diff --git a/src/backends/test/BackendRegistryTests.cpp b/src/backends/test/BackendRegistryTests.cpp
new file mode 100644
index 0000000000..e895df63a6
--- /dev/null
+++ b/src/backends/test/BackendRegistryTests.cpp
@@ -0,0 +1,91 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#include <boost/test/unit_test.hpp>
+
+#include <backends/BackendRegistry.hpp>
+#include <armnn/Types.hpp>
+
+namespace
+{
+
+class SwapRegistryStorage : public armnn::BackendRegistry
+{
+public:
+    SwapRegistryStorage() : armnn::BackendRegistry()
+    {
+        Swap(m_TempStorage);
+    }
+
+    ~SwapRegistryStorage()
+    {
+        Swap(m_TempStorage);
+    }
+
+private:
+    BackendRegistry::FactoryStorage m_TempStorage;
+};
+
+}
+
+BOOST_AUTO_TEST_SUITE(BackendRegistryTests)
+
+BOOST_AUTO_TEST_CASE(SwapRegistry)
+{
+    using armnn::BackendRegistry;
+    auto nFactories = BackendRegistry::Instance().Size();
+    {
+        SwapRegistryStorage helper;
+        BOOST_TEST(BackendRegistry::Instance().Size() == 0);
+    }
+    BOOST_TEST(BackendRegistry::Instance().Size() == nFactories);
+}
+
+BOOST_AUTO_TEST_CASE(TestRegistryHelper)
+{
+    using armnn::BackendRegistry;
+    SwapRegistryStorage helper;
+
+    bool called = false;
+    BackendRegistry::Helper factoryHelper("HelloWorld", [&called]() {
+        called = true;
+        return armnn::IBackendUniquePtr(nullptr, nullptr);
+    } );
+
+    // sanity check: the factory has not been called yet
+    BOOST_TEST(called == false);
+
+    auto factoryFunction = BackendRegistry::Instance().GetFactory("HelloWorld");
+
+    // sanity check: the factory still not called
+    BOOST_TEST(called == false);
+
+    factoryFunction();
+    BOOST_TEST(called == true);
+}
+
+BOOST_AUTO_TEST_CASE(TestDirectCallToRegistry)
+{
+    using armnn::BackendRegistry;
+    SwapRegistryStorage helper;
+
+    bool called = false;
+    BackendRegistry::Instance().Register("HelloWorld", [&called]() {
+        called = true;
+        return armnn::IBackendUniquePtr(nullptr, nullptr);
+    } );
+
+    // sanity check: the factory has not been called yet
+    BOOST_TEST(called == false);
+
+    auto factoryFunction = BackendRegistry::Instance().GetFactory("HelloWorld");
+
+    // sanity check: the factory still not called
+    BOOST_TEST(called == false);
+
+    factoryFunction();
+    BOOST_TEST(called == true);
+}
+
+BOOST_AUTO_TEST_SUITE_END()