diff --git a/fake_boot_control.h b/fake_boot_control.h
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+++ b/fake_boot_control.h
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+//
+// Copyright (C) 2015 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 UPDATE_ENGINE_FAKE_BOOT_CONTROL_H_
+#define UPDATE_ENGINE_FAKE_BOOT_CONTROL_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include <base/time/time.h>
+
+#include "update_engine/boot_control_interface.h"
+
+namespace chromeos_update_engine {
+
+// Implements a fake bootloader control interface used for testing.
+class FakeBootControl : public BootControlInterface {
+ public:
+  FakeBootControl() {
+    SetNumSlots(num_slots_);
+    // The current slot should be bootable.
+    is_bootable_[current_slot_] = true;
+  }
+
+  // BootControlInterface overrides.
+  unsigned int GetNumSlots() const override { return num_slots_; }
+  BootControlInterface::Slot GetCurrentSlot() const override {
+    return current_slot_;
+  }
+
+  bool GetPartitionDevice(const std::string& partition_name,
+                          BootControlInterface::Slot slot,
+                          std::string* device) const override {
+    if (slot >= num_slots_)
+      return false;
+    auto part_it = devices_[slot].find(partition_name);
+    if (part_it == devices_[slot].end())
+      return false;
+    *device = part_it->second;
+    return true;
+  }
+
+  bool IsSlotBootable(BootControlInterface::Slot slot) const override {
+    return slot < num_slots_ && is_bootable_[slot];
+  }
+
+  bool MarkSlotUnbootable(BootControlInterface::Slot slot) override {
+    if (slot >= num_slots_)
+      return false;
+    is_bootable_[slot] = false;
+    return true;
+  }
+
+  // Setters
+  void SetNumSlots(unsigned int num_slots) {
+    num_slots_ = num_slots;
+    is_bootable_.resize(num_slots_, false);
+    devices_.resize(num_slots_);
+  }
+
+  void SetCurrentSlot(BootControlInterface::Slot slot) {
+    current_slot_ = slot;
+  }
+
+  void SetPartitionDevice(const std::string partition_name,
+                          BootControlInterface::Slot slot,
+                          const std::string device) {
+    DCHECK(slot < num_slots_);
+    devices_[slot][partition_name] = device;
+  }
+
+  void SetSlotBootable(BootControlInterface::Slot slot, bool bootable) {
+    DCHECK(slot < num_slots_);
+    is_bootable_[slot] = bootable;
+  }
+
+ private:
+  BootControlInterface::Slot num_slots_{2};
+  BootControlInterface::Slot current_slot_{0};
+
+  std::vector<bool> is_bootable_;
+  std::vector<std::map<std::string, std::string>> devices_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeBootControl);
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // UPDATE_ENGINE_FAKE_BOOT_CONTROL_H_