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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 android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
/**
* Unit tests for WordComposer.
*/
@SmallTest
public class WordComposerTests extends AndroidTestCase {
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 String PREVWORD = "prevword";
wc.setComposingWord(STR_WITHIN_BMP, PREVWORD, null /* keyboard */);
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());
// Check the previous word is still there
assertEquals(PREVWORD, wc.getPreviousWord());
// 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();
assertNull(wc.getPreviousWord());
// \uD861\uDED7 is 𨛗, a character outside the BMP
final String STR_WITH_SUPPLEMENTARY_CHAR = "abcde\uD861\uDED7fgh";
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null /* previousWord */,
null /* keyboard */);
assertEquals(wc.size(), STR_WITH_SUPPLEMENTARY_CHAR.codePointCount(0,
STR_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());
assertNull(wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, STR_WITHIN_BMP, null /* keyboard */);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
assertEquals(STR_WITHIN_BMP, wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, STR_WITH_SUPPLEMENTARY_CHAR,
null /* keyboard */);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
assertEquals(STR_WITH_SUPPLEMENTARY_CHAR, wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, STR_WITHIN_BMP, null /* keyboard */);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-3));
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-1));
assertEquals(STR_WITHIN_BMP, wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null /* previousWord */,
null /* keyboard */);
wc.setCursorPositionWithinWord(3);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-9));
assertNull(wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, STR_WITH_SUPPLEMENTARY_CHAR,
null /* keyboard */);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-10));
assertEquals(STR_WITH_SUPPLEMENTARY_CHAR, wc.getPreviousWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null /* previousWord */,
null /* keyboard */);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-11));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null /* previousWord */,
null /* keyboard */);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null /* previousWord */,
null /* keyboard */);
wc.setCursorPositionWithinWord(2);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
}
}
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