Add generic mapping for gamepad

ui/events/ozone/gamepad/generic_gamepad_mapping_unittest.cc

Index: ui/events/ozone/gamepad/generic_gamepad_mapping_unittest.cc
diff --git a/ui/events/ozone/gamepad/generic_gamepad_mapping_unittest.cc b/ui/events/ozone/gamepad/generic_gamepad_mapping_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1e6c5a7444969e08b80b254d16b2da257dd5aff8
--- /dev/null
+++ b/ui/events/ozone/gamepad/generic_gamepad_mapping_unittest.cc
@@ -0,0 +1,127 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/events/ozone/gamepad/generic_gamepad_mapping.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <unistd.h>
+
+#include <memory>
+#include <queue>
+#include <utility>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/files/file_util.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/posix/eintr_wrapper.h"
+#include "base/run_loop.h"
+#include "base/time/time.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/events/event.h"
+#include "ui/events/ozone/device/device_manager.h"
+#include "ui/events/ozone/evdev/event_converter_test_util.h"
+#include "ui/events/ozone/evdev/event_device_info.h"
+#include "ui/events/ozone/evdev/event_device_test_util.h"
+#include "ui/events/ozone/evdev/event_device_util.h"
+#include "ui/events/ozone/evdev/event_factory_evdev.h"
+#include "ui/events/ozone/gamepad/gamepad_event.h"
+#include "ui/events/ozone/gamepad/gamepad_observer.h"
+#include "ui/events/ozone/gamepad/gamepad_provider_ozone.h"
+#include "ui/events/ozone/gamepad/static_gamepad_mapping.h"
+#include "ui/events/ozone/gamepad/webgamepad_constants.h"
+#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
+#include "ui/events/platform/platform_event_dispatcher.h"
+#include "ui/events/platform/platform_event_source.h"
+
+namespace {
+
+struct input_id {

[spang, 2017/06/01 05:08:13]

InputId

[jkwang, 2017/06/02 22:03:52]

Acknowledged.

+  uint16_t vendor_id;
+  uint16_t product_id;
+};
+
+const input_id test_ids[] = {

[spang, 2017/06/01 05:08:13]

kTestIds

[jkwang, 2017/06/02 22:03:52]

Acknowledged.

+    {0x045e, 0x028e},  // Xbox
+    {0x0b05, 0x4500}   // ADT 1
+};
+
+}  // namespace
+
+namespace ui {
+
+class GenericGamepadMappingTest : public testing::Test {
+ public:
+  GenericGamepadMappingTest() {}
+
+  void FakeDevinfoFromMapper(GamepadMapper* static_mapper,
+                             EventDeviceInfo* dev_info) {
+    unsigned long key_bits[EVDEV_BITS_TO_LONGS(KEY_CNT)];
+    unsigned long abs_bits[EVDEV_BITS_TO_LONGS(ABS_CNT)];
+    for (size_t i = 0; i < arraysize(key_bits); i++) {
+      key_bits[i] = 0;
+    }
+
+    for (size_t i = 0; i < arraysize(abs_bits); i++) {
+      abs_bits[i] = 0;
+    }
+    GamepadEventType type;
+    uint16_t mapped_code;
+
+    for (uint16_t code = BTN_MISC; code < KEY_MAX; code++) {
+      if ((*static_mapper)(EV_KEY, code, &type, &mapped_code)) {
+        EvdevSetBit(key_bits, code);
+      }
+    }
+    for (uint16_t code = ABS_X; code < ABS_MAX; code++) {
+      if ((*static_mapper)(EV_ABS, code, &type, &mapped_code)) {
+        EvdevSetBit(abs_bits, code);
+      }
+    }
+    dev_info->SetKeyEvents(key_bits, KEY_CNT);
+    dev_info->SetAbsEvents(abs_bits, ABS_CNT);
+  }
+
+  void CompareGamepadMapper(GamepadMapper* l_mapper, GamepadMapper* r_mapper) {

[spang, 2017/06/01 05:08:13]

const& arguments

[jkwang, 2017/06/02 22:03:52]

Acknowledged.

+    bool l_result, r_result;
+    GamepadEventType l_mapped_type, r_mapped_type;
+    uint16_t l_mapped_code, r_mapped_code;
+    for (uint16_t code = BTN_MISC; code < KEY_MAX; code++) {
+      l_result = (*l_mapper)(EV_KEY, code, &l_mapped_type, &l_mapped_code);
+      r_result = (*r_mapper)(EV_KEY, code, &r_mapped_type, &r_mapped_code);
+      EXPECT_EQ(l_result, r_result) << " Current Code: " << code;
+      if (l_result) {
+        EXPECT_EQ(l_mapped_type, r_mapped_type);
+        EXPECT_EQ(r_mapped_code, r_mapped_code);
+      }
+    }
+    for (uint16_t code = ABS_X; code < ABS_MAX; code++) {
+      l_result = (*l_mapper)(EV_ABS, code, &l_mapped_type, &l_mapped_code);
+      r_result = (*r_mapper)(EV_ABS, code, &r_mapped_type, &r_mapped_code);
+      EXPECT_EQ(l_result, r_result);
+      if (l_result) {
+        EXPECT_EQ(l_mapped_type, r_mapped_type);
+        EXPECT_EQ(r_mapped_code, r_mapped_code);
+      }
+    }
+  }
+};
+
+TEST_F(GenericGamepadMappingTest, GenericMappingCompatibility) {
+  for (size_t i = 0; i < arraysize(test_ids); i++) {
+    GamepadMapper* s_mapper =

[spang, 2017/06/01 05:08:13]

static_mapper

+        GetStaticGamepadMapper(test_ids[i].vendor_id, test_ids[i].product_id);
+    EventDeviceInfo dev_info;
+    FakeDevinfoFromMapper(s_mapper, &dev_info);

[spang, 2017/06/01 05:08:13]

I'd prefer testing with real data. Can you check in a capabilities literal for
these devices instead of computing a partial version of it using a mapping?

[jkwang, 2017/06/02 22:03:52]

Acknowledged.

+    GenericGamepadMapping g_mapper(dev_info);

[spang, 2017/06/01 05:08:13]

generic_mapper

[jkwang, 2017/06/02 22:03:52]

Acknowledged.

+    CompareGamepadMapper(s_mapper, &g_mapper);
+    delete s_mapper;
+  }
+}
+
+}  // namespace ui