Added a unit test for DynamicLayout#updateBlocks (1e130b2a) · Commits · e / os / android_frameworks_base

core/java/android/text/DynamicLayout.java

+17 −1

Original line number	Diff line number	Diff line
		@@ -378,12 +378,16 @@ public class DynamicLayout extends Layout
		* An index is associated to each block (which will be used by display lists),
		* this class simply invalidates the index of blocks overlapping a modification.
		*
		* This method is package private and not private so that it can be tested.
		*
		* @param startLine the first line of the range of modified lines
		* @param endLine the last line of the range, possibly equal to startLine, lower
		* than getLineCount()
		* @param newLineCount the number of lines that will replace the range, possibly 0
		*
		* @hide
		*/
		private void updateBlocks(int startLine, int endLine, int newLineCount) {
		void updateBlocks(int startLine, int endLine, int newLineCount) {
		int firstBlock = -1;
		int lastBlock = -1;
		for (int i = 0; i < mNumberOfBlocks; i++) {
		@@ -465,6 +469,18 @@ public class DynamicLayout extends Layout
		}
		}

		/**
		* This package private method is used for test purposes only
		* @hide
		*/
		void setBlocksDataForTest(int[] blockEnds, int[] blockIndices, int numberOfBlocks) {
		mBlockEnds = new int[blockEnds.length];
		mBlockIndices = new int[blockIndices.length];
		System.arraycopy(blockEnds, 0, mBlockEnds, 0, blockEnds.length);
		System.arraycopy(blockIndices, 0, mBlockIndices, 0, blockIndices.length);
		mNumberOfBlocks = numberOfBlocks;
		}

		/**
		* @hide
		*/

core/tests/coretests/src/android/text/DynamicLayoutBlocksTest.java

0 → 100644

+327 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2012 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.text;

		import static android.text.Layout.Alignment.*;

		import android.text.DynamicLayout;

		import junit.framework.TestCase;

		/**
		* Tests DynamciLayout updateBlocks method.
		*
		* Requires disabling access checks in the vm since this calls package-private APIs.
		*
		* @Suppress
		*/
		public class DynamicLayoutBlocksTest extends TestCase {
		private DynamicLayout dl = new DynamicLayout("", new TextPaint(), 0, ALIGN_NORMAL, 0, 0, false);
		private static final int ___ = DynamicLayout.INVALID_BLOCK_INDEX;

		private int[] initialBlockEnds;
		private int[] initialBlockIndices;

		private void defineInitialState(int[] ends, int[] indices) {
		initialBlockEnds = ends;
		initialBlockIndices = indices;
		assertEquals(initialBlockEnds.length, initialBlockIndices.length);
		}

		public void printBlocks(String message) {
		System.out.print(message);
		for (int i = 0; i < dl.getNumberOfBlocks(); i++) {
		System.out.print(" " + Integer.toString(dl.getBlockEnds()[i]));
		}
		System.out.println();
		}

		public void checkInvariants() {
		assertTrue(dl.getNumberOfBlocks() > 0);
		assertTrue(dl.getNumberOfBlocks() <= dl.getBlockEnds().length);
		assertEquals(dl.getBlockEnds().length, dl.getBlockIndices().length);

		for (int i = 1; i < dl.getNumberOfBlocks(); i++) {
		assertTrue(dl.getBlockEnds()[i] > dl.getBlockEnds()[i-1]);
		}
		}

		private void update(int startLine, int endLine, int newLineCount) {
		dl.setBlocksDataForTest(initialBlockEnds, initialBlockIndices, initialBlockEnds.length);
		checkInvariants();
		dl.updateBlocks(startLine, endLine, newLineCount);
		}

		private void assertState(int[] sizes, int[] indices) {
		checkInvariants();

		assertEquals(sizes.length, dl.getNumberOfBlocks());
		assertEquals(indices.length, dl.getNumberOfBlocks());

		int[] ends = new int[sizes.length];
		for (int i = 0; i < ends.length; i++) {
		ends[i] = i == 0 ? (sizes[0] == 0 ? 0 : sizes[0] - 1) : ends[i - 1] + sizes[i];
		}

		for (int i = 0; i < dl.getNumberOfBlocks(); i++) {
		assertEquals(ends[i], dl.getBlockEnds()[i]);
		assertEquals(indices[i], dl.getBlockIndices()[i]);
		}
		}

		private void assertState(int[] sizes) {
		int[] ids = new int[sizes.length];
		for (int i = 0; i < sizes.length; i++) {
		ids[i] = DynamicLayout.INVALID_BLOCK_INDEX;
		}
		assertState(sizes, ids);
		}

		public void testFrom0() {
		defineInitialState( new int[] { 0 }, new int[] { 123 });

		update(0, 0, 0);
		assertState( new int[] { 0 } );

		update(0, 0, 1);
		assertState( new int[] { 0 } );

		update(0, 0, 10);
		assertState( new int[] { 10 } );
		}

		public void testFrom1ReplaceByEmpty() {
		defineInitialState( new int[] { 100 }, new int[] { 123 });

		update(0, 0, 0);
		assertState( new int[] { 100 } );

		update(0, 10, 0);
		assertState( new int[] { 90 } );

		update(0, 100, 0);
		assertState( new int[] { 0 } );

		update(20, 30, 0);
		assertState( new int[] { 20, 70 } );

		update(20, 20, 0);
		assertState( new int[] { 20, 80 } );

		update(40, 100, 0);
		assertState( new int[] { 40 } );

		update(100, 100, 0);
		assertState( new int[] { 100 } );
		}

		public void testFrom1ReplaceFromFirstLine() {
		defineInitialState( new int[] { 100 }, new int[] { 123 });

		update(0, 0, 1);
		assertState( new int[] { 0, 100 } );

		update(0, 0, 10);
		assertState( new int[] { 10, 100 } );

		update(0, 30, 31);
		assertState( new int[] { 31, 70 } );

		update(0, 100, 20);
		assertState( new int[] { 20 } );
		}

		public void testFrom1ReplaceFromCenter() {
		defineInitialState( new int[] { 100 }, new int[] { 123 });

		update(20, 20, 1);
		assertState( new int[] { 20, 1, 80 } );

		update(20, 20, 10);
		assertState( new int[] { 20, 10, 80 } );

		update(20, 30, 50);
		assertState( new int[] { 20, 50, 70 } );

		update(20, 100, 50);
		assertState( new int[] { 20, 50 } );
		}

		public void testFrom1ReplaceFromEnd() {
		defineInitialState( new int[] { 100 }, new int[] { 123 });

		update(100, 100, 0);
		assertState( new int[] { 100 } );

		update(100, 100, 1);
		assertState( new int[] { 100, 1 } );

		update(100, 100, 10);
		assertState( new int[] { 100, 10 } );
		}

		public void testFrom2ReplaceFromFirstLine() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(0, 4, 50);
		assertState( new int[] { 50, 10-4, 20-10 }, new int[] { ___, ___, 456 } );

		update(0, 10, 50);
		assertState( new int[] { 50, 20-10 }, new int[] { ___, 456 } );

		update(0, 15, 50);
		assertState( new int[] { 50, 20-15 }, new int[] { ___, ___ } );

		update(0, 20, 50);
		assertState( new int[] { 50 }, new int[] { ___ } );
		}

		public void testFrom2ReplaceFromFirstBlock() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(3, 7, 50);
		assertState( new int[] { 3, 50, 10-7, 20-10 }, new int[] { ___, ___, ___, 456 } );

		update(3, 10, 50);
		assertState( new int[] { 3, 50, 20-10 }, new int[] { ___, ___, 456 } );

		update(3, 14, 50);
		assertState( new int[] { 3, 50, 20-14 }, new int[] { ___, ___, ___ } );

		update(3, 20, 50);
		assertState( new int[] { 3, 50 }, new int[] { ___, ___ } );
		}

		public void testFrom2ReplaceFromBottomBoundary() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(10, 10, 50);
		assertState( new int[] { 10, 50, 20-10 }, new int[] { ___, ___, 456 } );

		update(10, 14, 50);
		assertState( new int[] { 10, 50, 20-14 }, new int[] { ___, ___, ___ } );

		update(10, 20, 50);
		assertState( new int[] { 10, 50 }, new int[] { ___, ___ } );
		}

		public void testFrom2ReplaceFromTopBoundary() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(11, 11, 50);
		assertState( new int[] { 11, 50, 20-11 }, new int[] { 123, ___, ___ } );

		update(11, 14, 50);
		assertState( new int[] { 11, 50, 20-14 }, new int[] { 123, ___, ___ } );

		update(11, 20, 50);
		assertState( new int[] { 11, 50 }, new int[] { 123, ___ } );
		}

		public void testFrom2ReplaceFromSecondBlock() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(14, 14, 50);
		assertState( new int[] { 11, 14-11, 50, 20-14 }, new int[] { 123, ___, ___, ___ } );

		update(14, 17, 50);
		assertState( new int[] { 11, 14-11, 50, 20-17 }, new int[] { 123, ___, ___, ___ } );

		update(14, 20, 50);
		assertState( new int[] { 11, 14-11, 50 }, new int[] { 123, ___, ___ } );
		}

		public void testFrom2RemoveFromFirst() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(0, 4, 0);
		assertState( new int[] { 10-4, 20-10 }, new int[] { ___, 456 } );

		update(0, 10, 0);
		assertState( new int[] { 20-10 }, new int[] { 456 } );

		update(0, 14, 0);
		assertState( new int[] { 20-14 }, new int[] { ___ } );

		update(0, 20, 0);
		assertState( new int[] { 0 }, new int[] { ___ } );
		}

		public void testFrom2RemoveFromFirstBlock() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(4, 7, 0);
		assertState( new int[] { 4, 10-7, 20-10 }, new int[] { ___, ___, 456 } );

		update(4, 10, 0);
		assertState( new int[] { 4, 20-10 }, new int[] { ___, 456 } );

		update(4, 14, 0);
		assertState( new int[] { 4, 20-14 }, new int[] { ___, ___ } );

		update(4, 20, 0);
		assertState( new int[] { 4 }, new int[] { ___ } );
		}

		public void testFrom2RemoveFromSecondBlock() {
		defineInitialState( new int[] { 10, 20 }, new int[] { 123, 456 });

		update(14, 17, 0);
		assertState( new int[] { 11, 14-11, 20-17 }, new int[] { 123, ___, ___ } );

		update(14, 20, 0);
		assertState( new int[] { 11, 14-11 }, new int[] { 123, ___ } );
		}

		public void testFrom3ReplaceFromFirstBlock() {
		defineInitialState( new int[] { 10, 30, 60 }, new int[] { 123, 456, 789 });

		update(3, 7, 50);
		assertState( new int[] { 3, 50, 10-7, 30-10, 60-30 }, new int[] { ___, ___, ___, 456, 789 } );

		update(3, 10, 50);
		assertState( new int[] { 3, 50, 30-10, 60-30 }, new int[] { ___, ___, 456, 789 } );

		update(3, 17, 50);
		assertState( new int[] { 3, 50, 30-17, 60-30 }, new int[] { ___, ___, ___, 789 } );

		update(3, 30, 50);
		assertState( new int[] { 3, 50, 60-30 }, new int[] { ___, ___, 789 } );

		update(3, 40, 50);
		assertState( new int[] { 3, 50, 60-40 }, new int[] { ___, ___, ___ } );

		update(3, 60, 50);
		assertState( new int[] { 3, 50 }, new int[] { ___, ___ } );
		}

		public void testFrom3ReplaceFromSecondBlock() {
		defineInitialState( new int[] { 10, 30, 60 }, new int[] { 123, 456, 789 });

		update(13, 17, 50);
		assertState( new int[] { 11, 2, 50, 30-17, 60-30 }, new int[] { 123, ___, ___, ___, 789 } );

		update(13, 30, 50);
		assertState( new int[] { 11, 2, 50, 60-30 }, new int[] { 123, ___, ___, 789 } );

		update(13, 40, 50);
		assertState( new int[] { 11, 2, 50, 60-40 }, new int[] { 123, ___, ___, ___ } );

		update(13, 60, 50);
		assertState( new int[] { 11, 2, 50 }, new int[] { 123, ___, ___ } );
		}
		}