fail platform initialization when no device found

Change-Id: I76c8e12cd908be36cd8747346c6e543e3b748933

unit_tests/libult/create_command_stream.cpp

@@ -31,6 +31,7 @@
 namespace OCLRT {
 
 extern CommandStreamReceiverCreateFunc commandStreamReceiverFactory[2 * IGFX_MAX_CORE];
+bool getDevicesResult = true;
 
 CommandStreamReceiver *createCommandStream(const HardwareInfo *pHwInfo) {
     CommandStreamReceiver *commandStreamReceiver = nullptr;
@@ -51,6 +52,6 @@ CommandStreamReceiver *createCommandStream(const HardwareInfo *pHwInfo) {
 bool getDevices(HardwareInfo **hwInfo, size_t &numDevicesReturned) {
     *hwInfo = nullptr;
     numDevicesReturned = 0;
-    return true;
+    return getDevicesResult;
 }
 }

unit_tests/platform/CMakeLists.txt

@@ -22,6 +22,7 @@ set(IGDRCL_SRCS_tests_platform
     "${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt"
     "${CMAKE_CURRENT_SOURCE_DIR}/platform_icd_tests.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/platform_tests.cpp"
+    "${CMAKE_CURRENT_SOURCE_DIR}/platform_negative_tests.cpp"
     "${CMAKE_CURRENT_SOURCE_DIR}/platform_tests_mt.cpp"
     PARENT_SCOPE
 )

unit_tests/platform/platform_negative_tests.cpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2017, Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "runtime/helpers/options.h"
+#include "runtime/platform/platform.h"
+#include "unit_tests/helpers/variable_backup.h"
+#include "test.h"
+
+using namespace OCLRT;
+
+namespace OCLRT {
+extern bool getDevicesResult;
+}; // namespace OCLRT
+
+struct PlatformNegativeTest : public ::testing::Test {
+    void SetUp() override {
+        pPlatform = platform();
+    }
+
+    Platform *pPlatform = nullptr;
+};
+
+TEST_F(PlatformNegativeTest, GivenPlatformWhenGetDevicesFailedThenFalseIsReturned) {
+    class PlatformShutdown {
+      public:
+        PlatformShutdown(Platform *pPlatform) : pPlatform(pPlatform) {
+            pPlatform->shutdown();
+        }
+        ~PlatformShutdown() {
+            pPlatform->shutdown();
+        }
+
+      protected:
+        Platform *pPlatform = nullptr;
+    } a(pPlatform);
+
+    VariableBackup<decltype(getDevicesResult)> bkp(&getDevicesResult);
+    bkp = false;
+
+    auto ret = pPlatform->initialize(numPlatformDevices, platformDevices);
+    EXPECT_FALSE(ret);
+}