MdePkg: Add gmock examples

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4389

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Chris Johnson <chris.n.johnson@intel.com>
Acked-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Oliver Smith-Denny <osde@linux.microsoft.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>

MdePkg/Test/Mock/Include/GoogleTest/Library/MockUefiLib.h

@@ -0,0 +1,39 @@
+/** @file
+  Google Test mocks for UefiLib
+
+  Copyright (c) 2022, Intel Corporation. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MOCK_UEFI_LIB_H_
+#define MOCK_UEFI_LIB_H_
+
+#include <Library/GoogleTestLib.h>
+#include <Library/FunctionMockLib.h>
+extern "C" {
+#include <Uefi.h>
+#include <Library/UefiLib.h>
+}
+
+struct MockUefiLib {
+  MOCK_INTERFACE_DECLARATION (MockUefiLib);
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    GetVariable2,
+    (IN CONST CHAR16    *Name,
+     IN CONST EFI_GUID  *Guid,
+     OUT VOID           **Value,
+     OUT UINTN          *Size OPTIONAL)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    GetEfiGlobalVariable2,
+    (IN CONST CHAR16  *Name,
+     OUT VOID         **Value,
+     OUT UINTN        *Size OPTIONAL)
+    );
+};
+
+#endif

MdePkg/Test/Mock/Include/GoogleTest/Library/MockUefiRuntimeServicesTableLib.h

@@ -0,0 +1,42 @@
+/** @file
+  Google Test mocks for UefiRuntimeServicesTableLib
+
+  Copyright (c) 2022, Intel Corporation. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MOCK_UEFI_RUNTIME_SERVICES_TABLE_LIB_H_
+#define MOCK_UEFI_RUNTIME_SERVICES_TABLE_LIB_H_
+
+#include <Library/GoogleTestLib.h>
+#include <Library/FunctionMockLib.h>
+extern "C" {
+#include <Uefi.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+}
+
+struct MockUefiRuntimeServicesTableLib {
+  MOCK_INTERFACE_DECLARATION (MockUefiRuntimeServicesTableLib);
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    gRT_GetVariable,
+    (IN      CHAR16    *VariableName,
+     IN      EFI_GUID  *VendorGuid,
+     OUT     UINT32    *Attributes OPTIONAL,
+     IN OUT  UINTN     *DataSize,
+     OUT     VOID      *Data)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    gRT_SetVariable,
+    (IN CHAR16    *VariableName,
+     IN EFI_GUID  *VendorGuid,
+     IN UINT32    Attributes,
+     IN UINTN     DataSize,
+     IN VOID      *Data)
+    );
+};
+
+#endif