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diff --git a/neuralnetworks/aidl/utils/test/MockDevice.h b/neuralnetworks/aidl/utils/test/MockDevice.h
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+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_TEST_MOCK_DEVICE
+#define ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_TEST_MOCK_DEVICE
+
+#include <aidl/android/hardware/neuralnetworks/BnDevice.h>
+#include <android/binder_auto_utils.h>
+#include <android/binder_interface_utils.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace aidl::android::hardware::neuralnetworks::utils {
+
+class MockDevice final : public BnDevice {
+  public:
+    static std::shared_ptr<MockDevice> create();
+
+    MOCK_METHOD(ndk::ScopedAStatus, allocate,
+                (const BufferDesc& desc, const std::vector<IPreparedModelParcel>& preparedModels,
+                 const std::vector<BufferRole>& inputRoles,
+                 const std::vector<BufferRole>& outputRoles, DeviceBuffer* deviceBuffer),
+                (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getCapabilities, (Capabilities * capabilities), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getNumberOfCacheFilesNeeded,
+                (NumberOfCacheFiles * numberOfCacheFiles), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getSupportedExtensions, (std::vector<Extension> * extensions),
+                (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getSupportedOperations,
+                (const Model& model, std::vector<bool>* supportedOperations), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getType, (DeviceType * deviceType), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getVersionString, (std::string * version), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, prepareModel,
+                (const Model& model, ExecutionPreference preference, Priority priority,
+                 int64_t deadline, const std::vector<ndk::ScopedFileDescriptor>& modelCache,
+                 const std::vector<ndk::ScopedFileDescriptor>& dataCache,
+                 const std::vector<uint8_t>& token,
+                 const std::shared_ptr<IPreparedModelCallback>& callback),
+                (override));
+    MOCK_METHOD(ndk::ScopedAStatus, prepareModelFromCache,
+                (int64_t deadline, const std::vector<ndk::ScopedFileDescriptor>& modelCache,
+                 const std::vector<ndk::ScopedFileDescriptor>& dataCache,
+                 const std::vector<uint8_t>& token,
+                 const std::shared_ptr<IPreparedModelCallback>& callback),
+                (override));
+};
+
+inline std::shared_ptr<MockDevice> MockDevice::create() {
+    return ndk::SharedRefBase::make<MockDevice>();
+}
+
+}  // namespace aidl::android::hardware::neuralnetworks::utils
+
+#endif  // ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_TEST_MOCK_DEVICE