Refactor EventHubTests to use UinputDevice
EventHubTests uses uinput to emulate input devices. We refactor the
system calls into a untility file UinputDevice.h so it can be reused for
other integration tests.
Test: atest inputflinger_tests
Change-Id: If6b1b94b14c0bc71193cbc69ce1239a01990559b
diff --git a/services/inputflinger/tests/UinputDevice.h b/services/inputflinger/tests/UinputDevice.h
new file mode 100644
index 0000000..57d9011
--- /dev/null
+++ b/services/inputflinger/tests/UinputDevice.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2020 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 _UI_TEST_INPUT_UINPUT_INJECTOR_H
+#define _UI_TEST_INPUT_UINPUT_INJECTOR_H
+
+#include <android-base/unique_fd.h>
+#include <gtest/gtest.h>
+#include <inttypes.h>
+#include <linux/uinput.h>
+#include <log/log.h>
+
+#include <memory>
+
+namespace android {
+
+// This is the factory method that must be used to create a UinputDevice.
+template <class D, class... Ts>
+std::unique_ptr<D> createUinputDevice(Ts... args) {
+ // Using `new` to access non-public constructors.
+ std::unique_ptr<D> dev(new D(&args...));
+ EXPECT_NO_FATAL_FAILURE(dev->init());
+ return dev;
+}
+
+// --- UinputDevice ---
+
+class UinputDevice {
+public:
+ virtual ~UinputDevice();
+
+ inline const char* getName() const { return mName; }
+
+ // Subclasses must either provide a public constructor or must be-friend the factory method.
+ template <class D, class... Ts>
+ friend std::unique_ptr<D> createUinputDevice(Ts... args);
+
+protected:
+ const char* mName;
+
+ UinputDevice(const char* name);
+
+ // Signals which types of events this device supports before it is created.
+ // This must be overridden by subclasses.
+ virtual void configureDevice(int fd, uinput_user_dev* device) = 0;
+
+ void injectEvent(uint16_t type, uint16_t code, int32_t value);
+
+private:
+ base::unique_fd mDeviceFd;
+
+ // This is called once by the factory method createUinputDevice().
+ void init();
+};
+
+// --- UinputKeyboard ---
+
+class UinputKeyboard : public UinputDevice {
+public:
+ static constexpr const char* KEYBOARD_NAME = "Test Keyboard Device";
+
+ // Injects key press and sync.
+ void pressKey(int key);
+ // Injects key release and sync.
+ void releaseKey(int key);
+ // Injects 4 events: key press, sync, key release, and sync.
+ void pressAndReleaseKey(int key);
+
+ template <class D, class... Ts>
+ friend std::unique_ptr<D> createUinputDevice(Ts... args);
+
+protected:
+ UinputKeyboard(std::initializer_list<int> keys = {});
+
+private:
+ void configureDevice(int fd, uinput_user_dev* device) override;
+
+ std::set<int> mKeys;
+};
+
+// --- UinputHomeKey---
+
+// A keyboard device that has a single HOME key.
+class UinputHomeKey : public UinputKeyboard {
+public:
+ // Injects 4 events: key press, sync, key release, and sync.
+ void pressAndReleaseHomeKey();
+
+ template <class D, class... Ts>
+ friend std::unique_ptr<D> createUinputDevice(Ts... args);
+
+private:
+ UinputHomeKey();
+};
+
+} // namespace android
+
+#endif // _UI_TEST_INPUT_UINPUT_INJECTOR_H