Add cursor movement perftest.

/*

 * Copyright (C) 2016 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 android.widget;

import android.app.Activity;

import android.os.Bundle;

import android.perftests.utils.BenchmarkState;

import android.perftests.utils.PerfStatusReporter;

import android.perftests.utils.StubActivity;

import android.text.Selection;

import android.view.KeyEvent;

import android.view.View.MeasureSpec;

import android.view.ViewGroup;

import android.support.test.InstrumentationRegistry;

import android.support.test.filters.LargeTest;

import android.support.test.rule.ActivityTestRule;

import android.support.test.runner.AndroidJUnit4;

import java.util.Arrays;

import java.util.Collection;

import java.util.Locale;

import org.junit.Assert;

import org.junit.Rule;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.Parameterized.Parameters;

import org.junit.runners.Parameterized;

@LargeTest

@RunWith(Parameterized.class)

public class EditTextCursorMovementPerfTest {

    private static final String BOY = "\uD83D\uDC66";  // U+1F466

    private static final String US_FLAG = "\uD83C\uDDFA\uD83C\uDDF8";  // U+1F1FA U+1F1F8

    private static final String FAMILY =

            // U+1F469 U+200D U+1F469 U+200D U+1F467 U+200D U+1F467

            "\uD83D\uDC69\u200D\uD83D\uDC69\u200D\uD83D\uDC67\u200D\uD83D\uDC67";

    @Parameters(name = "{0}")

    public static Collection cases() {

        return Arrays.asList(new Object[][] {

            { "Latin", "aaa", 1 },

            { "Emoji", BOY + BOY + BOY, 2 },

            { "Flags", US_FLAG + US_FLAG + US_FLAG, 4 },

            { "ZwjSequence", FAMILY + FAMILY + FAMILY, 11 },

        });

    }

    private final String mMetricKey;

    private final String mText;

    private final int mCursorPos;

    private static final KeyEvent LEFT_ARROW_KEY_EVENT =

            new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_LEFT);

    private static final KeyEvent RIGHT_ARROW_KEY_EVENT =

            new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_RIGHT);

    public EditTextCursorMovementPerfTest(String metricKey, String text, int cursorPos) {

        mMetricKey = metricKey;

        mText = text;

        mCursorPos = cursorPos;

    }

    @Rule

    public ActivityTestRule<StubActivity> mActivityRule = new ActivityTestRule(StubActivity.class);

    @Rule

    public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();

    @Test

    public void testCursorMovement() {

        InstrumentationRegistry.getInstrumentation().runOnMainSync(new Runnable() {

            @Override

            public void run() {

                EditText editText = new EditText(mActivityRule.getActivity());

                editText.setText(mText, TextView.BufferType.EDITABLE);

                Selection.setSelection(editText.getText(), 0, 0);

                // Layout it here since the cursor movement requires layout information but it

                // happens asynchronously even if the view is attached to an Activity.

                editText.setLayoutParams(new ViewGroup.LayoutParams(

                        ViewGroup.LayoutParams.WRAP_CONTENT,

                        ViewGroup.LayoutParams.WRAP_CONTENT));

                editText.invalidate();

                editText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),

                                 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

                editText.layout(0, 0, 1024, 768);

                // mText contains three grapheme clusters. Move the cursor to the 2nd grapheme

                // cluster by forwarding right arrow key event.

                editText.onKeyDown(RIGHT_ARROW_KEY_EVENT.getKeyCode(), RIGHT_ARROW_KEY_EVENT);

                Assert.assertEquals(mCursorPos, Selection.getSelectionStart(editText.getText()));

                BenchmarkState state = mPerfStatusReporter.getBenchmarkState();

                while (state.keepRunning()) {

                    editText.onKeyDown(RIGHT_ARROW_KEY_EVENT.getKeyCode(), RIGHT_ARROW_KEY_EVENT);

                    editText.onKeyDown(LEFT_ARROW_KEY_EVENT.getKeyCode(), LEFT_ARROW_KEY_EVENT);

                }

            }

        });

    }

}