Add MockVariablePolicyHelperLib (#1238)

## Description

Provide MockVariablePolicyHelperLib for GoogleTest.



- [ ] Impacts functionality?
- [ ] Impacts security?
- [ ] Breaking change?
- [x] Includes tests?
- [ ] Includes documentation?
- [x] Backport to release branch?

## How This Was Tested
Tested in module integrated with this MockVariablePolicyHelperLib and
pass

## Integration Instructions

N/A

---------

Co-authored-by: Aaron <[email protected]>

MdeModulePkg/Test/MdeModulePkgHostTest.dsc

@@ -118,3 +118,4 @@
   MdeModulePkg/Test/Mock/Library/GoogleTest/MockCapsuleLib/MockCapsuleLib.inf
   MdeModulePkg/Test/Mock/Library/GoogleTest/MockUefiBootManagerLib/MockUefiBootManagerLib.inf
   MdeModulePkg/Test/Mock/Library/GoogleTest/MockPlatformHookLib/MockPlatformHookLib.inf
+  MdeModulePkg/Test/Mock/Library/GoogleTest/MockVariablePolicyHelperLib/MockVariablePolicyHelperLib.inf

MdeModulePkg/Test/Mock/Include/GoogleTest/Library/MockVariablePolicyHelperLib.h

@@ -0,0 +1,81 @@
+/** @file MockVariablePolicyHelper.h
+  Google Test mocks for VariablePolicyHelper
+
+  Copyright (c) Microsoft Corporation.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MOCK_VARIABLE_POLICY_HELPER_LIB_H_
+#define MOCK_VARIABLE_POLICY_HELPER_LIB_H_
+
+#include <Library/GoogleTestLib.h>
+#include <Library/FunctionMockLib.h>
+extern "C" {
+  #include <Uefi.h>
+  #include <Protocol/VariablePolicy.h>
+}
+
+//
+// Declarations to handle usage of the VariablePolicyHelperLib by creating mock
+//
+struct MockVariablePolicyHelperLib {
+  MOCK_INTERFACE_DECLARATION (MockVariablePolicyHelperLib);
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    CreateBasicVariablePolicy,
+    (IN CONST  EFI_GUID         *Namespace,
+     IN CONST  CHAR16           *Name OPTIONAL,
+     IN        UINT32           MinSize,
+     IN        UINT32           MaxSize,
+     IN        UINT32           AttributesMustHave,
+     IN        UINT32           AttributesCantHave,
+     IN        UINT8            LockPolicyType,
+     OUT VARIABLE_POLICY_ENTRY  **NewEntry)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    CreateVarStateVariablePolicy,
+    (IN CONST  EFI_GUID         *Namespace,
+     IN CONST  CHAR16           *Name OPTIONAL,
+     IN        UINT32           MinSize,
+     IN        UINT32           MaxSize,
+     IN        UINT32           AttributesMustHave,
+     IN        UINT32           AttributesCantHave,
+     IN CONST  EFI_GUID         *VarStateNamespace,
+     IN        UINT8            VarStateValue,
+     IN CONST  CHAR16           *VarStateName,
+     OUT VARIABLE_POLICY_ENTRY  **NewEntry)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    RegisterBasicVariablePolicy,
+    (IN        EDKII_VARIABLE_POLICY_PROTOCOL  *VariablePolicy,
+     IN CONST  EFI_GUID                        *Namespace,
+     IN CONST  CHAR16                          *Name OPTIONAL,
+     IN        UINT32                          MinSize,
+     IN        UINT32                          MaxSize,
+     IN        UINT32                          AttributesMustHave,
+     IN        UINT32                          AttributesCantHave,
+     IN        UINT8                           LockPolicyType)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    RegisterVarStateVariablePolicy,
+    (IN        EDKII_VARIABLE_POLICY_PROTOCOL  *VariablePolicy,
+     IN CONST  EFI_GUID                        *Namespace,
+     IN CONST  CHAR16                          *Name OPTIONAL,
+     IN        UINT32                          MinSize,
+     IN        UINT32                          MaxSize,
+     IN        UINT32                          AttributesMustHave,
+     IN        UINT32                          AttributesCantHave,
+     IN CONST  EFI_GUID                        *VarStateNamespace,
+     IN CONST  CHAR16                          *VarStateName,
+     IN        UINT8                           VarStateValue)
+    );
+};
+
+#endif

MdeModulePkg/Test/Mock/Library/GoogleTest/MockVariablePolicyHelperLib/MockVariablePolicyHelperLib.cpp

@@ -0,0 +1,14 @@
+/** @file MockVariablePolicyHelperLib.cpp
+  Google Test mocks for VariablePolicyHelperLib
+
+  Copyright (c) Microsoft Corporation.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <GoogleTest/Library/MockVariablePolicyHelperLib.h>
+
+MOCK_INTERFACE_DEFINITION (MockVariablePolicyHelperLib);
+MOCK_FUNCTION_DEFINITION (MockVariablePolicyHelperLib, CreateBasicVariablePolicy, 8, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockVariablePolicyHelperLib, CreateVarStateVariablePolicy, 10, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockVariablePolicyHelperLib, RegisterBasicVariablePolicy, 8, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockVariablePolicyHelperLib, RegisterVarStateVariablePolicy, 10, EFIAPI);

MdeModulePkg/Test/Mock/Library/GoogleTest/MockVariablePolicyHelperLib/MockVariablePolicyHelperLib.inf

@@ -0,0 +1,33 @@
+## @file MockVariablePolicyHelperLib.inf
+#  Mock Variable Policy Library implementation.
+#
+#  Copyright (c) Microsoft Corporation.
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = MockVariablePolicyHelperLib
+  FILE_GUID                      = 251633CE-1FE7-4500-BF0A-CF3B2B52B9EE
+  MODULE_TYPE                    = HOST_APPLICATION
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = VariablePolicyHelperLib
+  PI_SPECIFICATION_VERSION       = 0x0001000A
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  MockVariablePolicyHelperLib.cpp
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  UnitTestFrameworkPkg/UnitTestFrameworkPkg.dec
+
+[LibraryClasses]
+  GoogleTestLib
+
+[BuildOptions]
+  MSFT:*_*_*_CC_FLAGS = /EHsc