Issue #17 : The mock of the GpioBasic has the wrong definition.

The MOckGpioBasic had wrong definition. It was inheriting the
SdkWrapper incorrectly. This was fixed.

To confirm this fix is Ok, we added new test case MockGpioBasicTest.constructor.

This Test case is correctly compiled and run.

Author: suikan4github

src/gpio/gpiobasic.hpp

@@ -101,8 +101,10 @@ class GpioBasic {
 };
 #if __has_include(<gmock/gmock.h>)
 // GCOVR_EXCL_START
-class MockGpioBasic : public SdkWrapper {
+class MockGpioBasic : public GpioBasic {
  public:
+  MockGpioBasic(SdkWrapper &sdk)
+      : GpioBasic(sdk, 0) {};  // 0 is dummy. We don't care.
   MOCK_METHOD1(SetDir, void(bool));
   MOCK_METHOD1(SetInputEnabled, void(bool));
   MOCK_METHOD1(Put, void(bool));

test/test_mockgpiobasic.cpp

@@ -0,0 +1,26 @@
+/*
+ * Test the MockGpioBasic class.
+ * Only constructor is tested.
+ */
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "gpiobasic.hpp"
+#include "sdkwrapper.hpp"
+
+class MockGpioBasicTest : public ::testing::Test {
+ protected:
+  virtual void SetUp() { gpio = new rpp_driver::MockGpioBasic(sdk_); }
+
+  virtual void TearDown() { delete gpio; }
+
+  ::rpp_driver::MockSdkWrapper sdk_;
+  ::rpp_driver::MockGpioBasic *gpio;
+};
+
+/*
+ * In this test case, we test teh MockGpioBasic is surely able to compile.
+ * So, none of the other methods are tested.
+ */
+TEST_F(MockGpioBasicTest, constructor) {}