Add KeyCharacterMapTest unit test

/*

 * Copyright 2024 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.

 */

package com.android.test.input

import android.view.KeyCharacterMap

import android.view.KeyEvent

import org.junit.Assert.assertEquals

import org.junit.Test

/**

 * Tests for {@link KeyCharacterMap}.

 *

 * <p>Build/Install/Run:

 * atest KeyCharacterMapTest

 *

 */

class KeyCharacterMapTest {

    @Test

    fun testGetFallback() {

        // Based off of VIRTUAL kcm fallbacks.

        val keyCharacterMap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD)

        // One modifier fallback.

        assertEquals(

            keyCharacterMap.getFallbackAction(KeyEvent.KEYCODE_SPACE,

                KeyEvent.META_CTRL_ON).keyCode,

            KeyEvent.KEYCODE_LANGUAGE_SWITCH)

        // Multiple modifier fallback.

        assertEquals(

            keyCharacterMap.getFallbackAction(KeyEvent.KEYCODE_DEL,

                KeyEvent.META_CTRL_ON or KeyEvent.META_ALT_ON).keyCode,

            KeyEvent.KEYCODE_BACK)

        // No default button, fallback only.

        assertEquals(

            keyCharacterMap.getFallbackAction(KeyEvent.KEYCODE_BUTTON_A, 0).keyCode,

            KeyEvent.KEYCODE_DPAD_CENTER)

    }

}