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/*
* Copyright (C) 2013 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.inputmethod.latin;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.inputmethod.latin.common.Constants;
import com.android.inputmethod.latin.common.CoordinateUtils;
import com.android.inputmethod.latin.common.StringUtils;
import org.junit.Test;
import org.junit.runner.RunWith;
/**
* Unit tests for WordComposer.
*/
@SmallTest
@RunWith(AndroidJUnit4.class)
public class WordComposerTests {
@Test
public void testMoveCursor() {
final WordComposer wc = new WordComposer();
// BMP is the Basic Multilingual Plane, as defined by Unicode. This includes
// most characters for most scripts, including all Roman alphabet languages,
// CJK, Arabic, Hebrew. Notable exceptions include some emoji and some
// very rare Chinese ideograms. BMP characters can be encoded on 2 bytes
// in UTF-16, whereas those outside the BMP need 4 bytes.
// http://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane
final String STR_WITHIN_BMP = "abcdef";
final int[] CODEPOINTS_WITHIN_BMP = StringUtils.toCodePointArray(STR_WITHIN_BMP);
final int[] COORDINATES_WITHIN_BMP =
CoordinateUtils.newCoordinateArray(CODEPOINTS_WITHIN_BMP.length,
Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE);
wc.setComposingWord(CODEPOINTS_WITHIN_BMP, COORDINATES_WITHIN_BMP);
assertEquals(wc.size(), STR_WITHIN_BMP.codePointCount(0, STR_WITHIN_BMP.length()));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setCursorPositionWithinWord(2);
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor to after the 'd'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(2));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor to after the 'e'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertEquals(wc.size(), 6);
// Move the cursor to after the 'f'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor past the end of the word
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(15));
// Do what LatinIME does when the cursor is moved outside of the word,
// and check the behavior is correct.
wc.reset();
// \uD861\uDED7 is 𨛗, a character outside the BMP
final String STR_WITH_SUPPLEMENTARY_CHAR = "abcde\uD861\uDED7fgh";
final int[] CODEPOINTS_WITH_SUPPLEMENTARY_CHAR =
StringUtils.toCodePointArray(STR_WITH_SUPPLEMENTARY_CHAR);
final int[] COORDINATES_WITH_SUPPLEMENTARY_CHAR =
CoordinateUtils.newCoordinateArray(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR.length,
Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE);
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
assertEquals(wc.size(), CODEPOINTS_WITH_SUPPLEMENTARY_CHAR.length);
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setCursorPositionWithinWord(3);
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(6));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-3));
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-1));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
wc.setCursorPositionWithinWord(3);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-9));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-10));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-11));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
wc.setComposingWord(CODEPOINTS_WITH_SUPPLEMENTARY_CHAR,
COORDINATES_WITH_SUPPLEMENTARY_CHAR);
wc.setCursorPositionWithinWord(2);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
}
}
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