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// Copyright 2014 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.util;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.clock.BlazeClock;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for Fingerprint.
*/
@RunWith(JUnit4.class)
public class FingerprintTest {
private static void assertFingerprintsDiffer(List<String> list1, List<String>list2) {
Fingerprint f1 = new Fingerprint();
Fingerprint f1Latin1 = new Fingerprint();
for (String s : list1) {
f1.addString(s);
f1Latin1.addString(s);
}
Fingerprint f2 = new Fingerprint();
Fingerprint f2Latin1 = new Fingerprint();
for (String s : list2) {
f2.addString(s);
f2Latin1.addString(s);
}
assertThat(f1.hexDigestAndReset()).isNotEqualTo(f2.hexDigestAndReset());
assertThat(f1Latin1.hexDigestAndReset()).isNotEqualTo(f2Latin1.hexDigestAndReset());
}
// You can validate the md5 of the simple string against
// echo -n 'Hello World!'| md5sum
@Test
public void bytesFingerprint() {
assertThat(new Fingerprint().addBytes("Hello World!".getBytes(UTF_8)).hexDigestAndReset())
.isEqualTo("ed076287532e86365e841e92bfc50d8c");
assertThat(Fingerprint.getHexDigest("Hello World!"))
.isEqualTo("ed076287532e86365e841e92bfc50d8c");
}
@Test
public void otherStringFingerprint() {
assertFingerprintsDiffer(ImmutableList.of("Hello World!"),
ImmutableList.of("Goodbye World."));
}
@Test
public void multipleUpdatesDiffer() throws Exception {
assertFingerprintsDiffer(ImmutableList.of("Hello ", "World!"),
ImmutableList.of("Hello World!"));
}
@Test
public void multipleUpdatesShiftedDiffer() throws Exception {
assertFingerprintsDiffer(ImmutableList.of("Hello ", "World!"),
ImmutableList.of("Hello", " World!"));
}
@Test
public void listFingerprintNotSameAsIndividualElements() throws Exception {
Fingerprint f1 = new Fingerprint();
f1.addString("Hello ");
f1.addString("World!");
Fingerprint f2 = new Fingerprint();
f2.addStrings(ImmutableList.of("Hello ", "World!"));
assertThat(f1.hexDigestAndReset()).isNotEqualTo(f2.hexDigestAndReset());
}
@Test
public void mapFingerprintNotSameAsIndividualElements() throws Exception {
Fingerprint f1 = new Fingerprint();
Map<String, String> map = new HashMap<>();
map.put("Hello ", "World!");
f1.addStringMap(map);
Fingerprint f2 = new Fingerprint();
f2.addStrings(ImmutableList.of("Hello ", "World!"));
assertThat(f1.hexDigestAndReset()).isNotEqualTo(f2.hexDigestAndReset());
}
@Test
public void addBoolean() throws Exception {
String f1 = new Fingerprint().addBoolean(true).hexDigestAndReset();
String f2 = new Fingerprint().addBoolean(false).hexDigestAndReset();
String f3 = new Fingerprint().addBoolean(true).hexDigestAndReset();
assertThat(f1).isEqualTo(f3);
assertThat(f1).isNotEqualTo(f2);
}
@Test
public void addPath() throws Exception {
PathFragment pf = PathFragment.create("/etc/pwd");
assertThat(new Fingerprint().addPath(pf).hexDigestAndReset())
.isEqualTo("63ab5c47c117635407a1af6377e216bc");
Path p = new InMemoryFileSystem(BlazeClock.instance()).getPath(pf);
assertThat(new Fingerprint().addPath(p).hexDigestAndReset())
.isEqualTo("63ab5c47c117635407a1af6377e216bc");
}
@Test
public void addNullableBoolean() throws Exception {
String f1 = new Fingerprint().addNullableBoolean(null).hexDigestAndReset();
assertThat(f1).isEqualTo(new Fingerprint().addNullableBoolean(null).hexDigestAndReset());
assertThat(f1).isNotEqualTo(new Fingerprint().addNullableBoolean(false).hexDigestAndReset());
assertThat(f1).isNotEqualTo(new Fingerprint().addNullableBoolean(true).hexDigestAndReset());
}
@Test
public void addNullableInteger() throws Exception {
String f1 = new Fingerprint().addNullableInt(null).hexDigestAndReset();
assertThat(f1).isEqualTo(new Fingerprint().addNullableInt(null).hexDigestAndReset());
assertThat(f1).isNotEqualTo(new Fingerprint().addNullableInt(0).hexDigestAndReset());
assertThat(f1).isNotEqualTo(new Fingerprint().addNullableInt(1).hexDigestAndReset());
}
@Test
public void addNullableString() throws Exception {
String f1 = new Fingerprint().addNullableString(null).hexDigestAndReset();
assertThat(f1).isEqualTo(new Fingerprint().addNullableString(null).hexDigestAndReset());
assertThat(f1).isNotEqualTo(new Fingerprint().addNullableString("").hexDigestAndReset());
}
@Test
public void testReusableAfterReset() throws Exception {
Fingerprint fp = new Fingerprint();
String f1 = convolutedFingerprintAndReset(fp);
String f2 = convolutedFingerprintAndReset(fp);
assertThat(f1).isEqualTo(f2);
}
private static String convolutedFingerprintAndReset(Fingerprint fingerprint) {
return fingerprint
.addBoolean(false)
.addBytes(new byte[10])
.addBytes(new byte[10], 0, 5)
.addInt(20)
.addLong(30)
.addNullableBoolean(null)
.addNullableInt(null)
.addNullableString(null)
.addPath(PathFragment.create("/foo/bar"))
.addPaths(ImmutableList.of(PathFragment.create("/foo/bar")))
.addString("baz")
.addUUID(UUID.fromString("12345678-1234-1234-1234-1234567890ab"))
.hexDigestAndReset();
}
}
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