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// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.utils;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import it.unimi.dsi.fastutil.ints.Int2IntArrayMap;
import java.util.Map;
import org.junit.Test;
public class ArrayUtilsTest {
@Test
public void testCopyWithSparseChanges_identical() throws Exception {
int size = 3;
Integer[] input = new Integer[size];
for (int i = 0; i < size; i++) {
input[i] = i;
}
Integer[] output =
ArrayUtils.copyWithSparseChanges(Integer[].class, input, new Int2IntArrayMap());
assertNotEquals(input, output);
for (int i = 0; i < size; i++) {
assertTrue(i == output[i]);
}
}
@Test
public void testCopyWithSparseChanges_oneChangeAtBeginning() throws Exception {
int size = 3;
Integer[] input = new Integer[size];
for (int i = 0; i < size; i++) {
input[i] = i;
}
Map<Integer, Integer> changes = new Int2IntArrayMap();
changes.put(0, size);
Integer[] output = ArrayUtils.copyWithSparseChanges(Integer[].class, input, changes);
assertNotEquals(input, output);
assertTrue(size == output[0]);
for (int i = 1; i < size; i++) {
assertTrue(i == output[i]);
}
}
@Test
public void testCopyWithSparseChanges_oneChangeInMiddle() throws Exception {
int size = 3;
Integer[] input = new Integer[size];
for (int i = 0; i < size; i++) {
input[i] = i;
}
Map<Integer, Integer> changes = new Int2IntArrayMap();
changes.put(1, size);
Integer[] output = ArrayUtils.copyWithSparseChanges(Integer[].class, input, changes);
assertNotEquals(input, output);
assertTrue(size == output[1]);
for (int i = 0; i < size; i++) {
if (i == 1) {
continue;
}
assertTrue(i == output[i]);
}
}
@Test
public void testCopyWithSparseChanges_oneChangeAtEnd() throws Exception {
int size = 3;
Integer[] input = new Integer[size];
for (int i = 0; i < size; i++) {
input[i] = i;
}
Map<Integer, Integer> changes = new Int2IntArrayMap();
changes.put(2, size);
Integer[] output = ArrayUtils.copyWithSparseChanges(Integer[].class, input, changes);
assertNotEquals(input, output);
assertTrue(size == output[2]);
for (int i = 0; i < size - 1; i++) {
assertTrue(i == output[i]);
}
}
@Test
public void testCopyWithSparseChanges_twoChangesAtEnds() throws Exception {
int size = 3;
Integer[] input = new Integer[size];
for (int i = 0; i < size; i++) {
input[i] = i;
}
Map<Integer, Integer> changes = new Int2IntArrayMap();
changes.put(0, size);
changes.put(2, size);
Integer[] output = ArrayUtils.copyWithSparseChanges(Integer[].class, input, changes);
assertNotEquals(input, output);
assertTrue(size == output[0]);
assertFalse(size == output[1]);
assertTrue(size == output[2]);
}
}
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