Merge "Add tests for Paint#getTextRunAdvances" (57bbbaca) · Commits · e / os / android_frameworks_base

graphics/tests/graphicstests/src/android/graphics/PaintTest.java

0 → 100644

+165 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2015 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.graphics;

		import android.test.AndroidTestCase;

		public class PaintTest extends AndroidTestCase {
		public void testGetTextRunAdvances() {
		{
		// LTR
		String text = "abcdef";
		assertGetTextRunAdvances(text, 0, text.length(), 0, text.length(), false, true);
		assertGetTextRunAdvances(text, 1, text.length() - 1, 0, text.length(), false, false);
		}
		{
		// RTL
		final String text =
		"\u0645\u0627\u0020\u0647\u064A\u0020\u0627\u0644\u0634" +
		"\u0641\u0631\u0629\u0020\u0627\u0644\u0645\u0648\u062D" +
		"\u062F\u0629\u0020\u064A\u0648\u0646\u064A\u0643\u0648" +
		"\u062F\u061F";
		assertGetTextRunAdvances(text, 0, text.length(), 0, text.length(), true, true);
		assertGetTextRunAdvances(text, 1, text.length() - 1, 0, text.length(), true, false);
		}
		}

		private void assertGetTextRunAdvances(String str, int start, int end,
		int contextStart, int contextEnd, boolean isRtl, boolean compareWithOtherMethods) {
		Paint p = new Paint();

		final int count = end - start;
		final float[][] advanceArrays = new float[4][count];

		final float advance = p.getTextRunAdvances(str, start, end, contextStart, contextEnd,
		isRtl, advanceArrays[0], 0);

		char chars[] = str.toCharArray();
		final float advance_c = p.getTextRunAdvances(chars, start, count, contextStart,
		contextEnd - contextStart, isRtl, advanceArrays[1], 0);
		assertEquals(advance, advance_c, 1.0f);

		for (int c = 1; c < count; ++c) {
		final float firstPartAdvance = p.getTextRunAdvances(str, start, start + c,
		contextStart, contextEnd, isRtl, advanceArrays[2], 0);
		final float secondPartAdvance = p.getTextRunAdvances(str, start + c, end,
		contextStart, contextEnd, isRtl, advanceArrays[2], c);
		assertEquals(advance, firstPartAdvance + secondPartAdvance, 1.0f);


		final float firstPartAdvance_c = p.getTextRunAdvances(chars, start, c,
		contextStart, contextEnd - contextStart, isRtl, advanceArrays[3], 0);
		final float secondPartAdvance_c = p.getTextRunAdvances(chars, start + c,
		count - c, contextStart, contextEnd - contextStart, isRtl,
		advanceArrays[3], c);
		assertEquals(advance, firstPartAdvance_c + secondPartAdvance_c, 1.0f);
		assertEquals(firstPartAdvance, firstPartAdvance_c, 1.0f);
		assertEquals(secondPartAdvance, secondPartAdvance_c, 1.0f);

		for (int i = 1; i < advanceArrays.length; i++) {
		for (int j = 0; j < count; j++) {
		assertEquals(advanceArrays[0][j], advanceArrays[i][j], 1.0f);
		}
		}

		// Compare results with measureText, getRunAdvance, and getTextWidths.
		if (compareWithOtherMethods && start == contextStart && end == contextEnd) {
		assertEquals(advance, p.measureText(str, start, end), 1.0f);
		assertEquals(advance, p.getRunAdvance(
		str, start, end, contextStart, contextEnd, isRtl, end), 1.0f);

		final float[] widths = new float[count];
		p.getTextWidths(str, start, end, widths);
		for (int i = 0; i < count; i++) {
		assertEquals(advanceArrays[0][i], widths[i], 1.0f);
		}
		}
		}
		}

		public void testGetTextRunAdvances_invalid() {
		Paint p = new Paint();
		String text = "test";

		try {
		p.getTextRunAdvances((String)null, 0, 0, 0, 0, false, null, 0);
		fail("Should throw an IllegalArgumentException.");
		} catch (IllegalArgumentException e) {
		}

		try {
		p.getTextRunAdvances((CharSequence)null, 0, 0, 0, 0, false, null, 0);
		fail("Should throw an IllegalArgumentException.");
		} catch (IllegalArgumentException e) {
		}

		try {
		p.getTextRunAdvances((char[])null, 0, 0, 0, 0, false, null, 0);
		fail("Should throw an IllegalArgumentException.");
		} catch (IllegalArgumentException e) {
		}

		try {
		p.getTextRunAdvances(text, 0, text.length(), 0, text.length(), false,
		new float[text.length() - 1], 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		try {
		p.getTextRunAdvances(text, 0, text.length(), 0, text.length(), false,
		new float[text.length()], 1);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		// 0 > contextStart
		try {
		p.getTextRunAdvances(text, 0, text.length(), -1, text.length(), false, null, 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		// contextStart > start
		try {
		p.getTextRunAdvances(text, 0, text.length(), 1, text.length(), false, null, 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		// start > end
		try {
		p.getTextRunAdvances(text, 1, 0, 0, text.length(), false, null, 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		// end > contextEnd
		try {
		p.getTextRunAdvances(text, 0, text.length(), 0, text.length() - 1, false, null, 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}

		// contextEnd > text.length
		try {
		p.getTextRunAdvances(text, 0, text.length(), 0, text.length() + 1, false, null, 0);
		fail("Should throw an IndexOutOfBoundsException.");
		} catch (IndexOutOfBoundsException e) {
		}
		}
		}