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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.actions;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.US_ASCII;
import com.google.devtools.build.lib.actions.cache.Metadata;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Random;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit test for {@link ActionInputMap}. */
@RunWith(JUnit4.class)
public final class ActionInputMapTest {
private ActionInputMap map;
@Before
public void init() {
map = new ActionInputMap(1); // small hint to stress the map
}
@Test
public void basicPutAndLookup() {
assertThat(put("/abc/def", 5)).isTrue();
assertThat(map.size()).isEqualTo(1);
assertContains("/abc/def", 5);
assertThat(map.getMetadata("blah")).isNull();
assertThat(map.getInput("blah")).isNull();
}
@Test
public void ignoresSubsequent() {
assertThat(put("/abc/def", 5)).isTrue();
assertThat(map.size()).isEqualTo(1);
assertThat(put("/abc/def", 6)).isFalse();
assertThat(map.size()).isEqualTo(1);
assertThat(put("/ghi/jkl", 7)).isTrue();
assertThat(map.size()).isEqualTo(2);
assertThat(put("/ghi/jkl", 8)).isFalse();
assertThat(map.size()).isEqualTo(2);
assertContains("/abc/def", 5);
assertContains("/ghi/jkl", 7);
}
@Test
public void clear() {
assertThat(put("/abc/def", 5)).isTrue();
assertThat(map.size()).isEqualTo(1);
assertThat(put("/ghi/jkl", 7)).isTrue();
assertThat(map.size()).isEqualTo(2);
map.clear();
assertThat(map.size()).isEqualTo(0);
assertThat(map.getMetadata("/abc/def")).isNull();
assertThat(map.getMetadata("/ghi/jkl")).isNull();
}
@Test
public void stress() {
ArrayList<TestEntry> data = new ArrayList<>();
{
Random rng = new Random();
HashSet<TestInput> deduper = new HashSet<>();
for (int i = 0; i < 100000; ++i) {
byte[] bytes = new byte[80];
rng.nextBytes(bytes);
for (int j = 0; j < bytes.length; ++j) {
bytes[j] &= ((byte) 0x7f);
}
TestInput nextInput = new TestInput(new String(bytes, US_ASCII));
if (deduper.add(nextInput)) {
data.add(new TestEntry(nextInput, new TestMetadata(i)));
}
}
}
for (int iteration = 0; iteration < 20; ++iteration) {
map.clear();
Collections.shuffle(data);
for (int i = 0; i < data.size(); ++i) {
TestEntry entry = data.get(i);
assertThat(map.put(entry.input, entry.metadata)).isTrue();
}
assertThat(map.size()).isEqualTo(data.size());
for (int i = 0; i < data.size(); ++i) {
TestEntry entry = data.get(i);
assertThat(map.getMetadata(entry.input)).isEqualTo(entry.metadata);
}
}
}
private boolean put(String execPath, int value) {
return map.put(new TestInput(execPath), new TestMetadata(value));
}
private void assertContains(String execPath, int value) {
assertThat(map.getMetadata(new TestInput(execPath))).isEqualTo(new TestMetadata(value));
assertThat(map.getMetadata(execPath)).isEqualTo(new TestMetadata(value));
assertThat(map.getInput(execPath)).isEqualTo(new TestInput(execPath));
}
private static class TestEntry {
public final TestInput input;
public final TestMetadata metadata;
public TestEntry(TestInput input, TestMetadata metadata) {
this.input = input;
this.metadata = metadata;
}
}
private static class TestInput implements ActionInput {
private final PathFragment fragment;
public TestInput(String fragment) {
this.fragment = PathFragment.create(fragment);
}
@Override
public PathFragment getExecPath() {
return fragment;
}
@Override
public String getExecPathString() {
return fragment.toString();
}
@Override
public boolean equals(Object other) {
if (!(other instanceof TestInput)) {
return false;
}
if (this == other) {
return true;
}
return fragment.equals(((TestInput) other).fragment);
}
@Override
public int hashCode() {
return fragment.hashCode();
}
}
private static class TestMetadata implements Metadata {
private final int id;
public TestMetadata(int id) {
this.id = id;
}
@Override
public FileStateType getType() {
throw new UnsupportedOperationException();
}
@Override
public byte[] getDigest() {
throw new UnsupportedOperationException();
}
@Override
public long getSize() {
throw new UnsupportedOperationException();
}
@Override
public long getModifiedTime() {
throw new UnsupportedOperationException();
}
@Override
@SuppressWarnings("EqualsHashCode")
public boolean equals(Object o) {
if (!(o instanceof TestMetadata)) {
return false;
}
return id == ((TestMetadata) o).id;
}
}
}
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