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/*
* Copyright 2016-17, OpenCensus Authors
*
* 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 io.opencensus.trace;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.testing.EqualsTester;
import java.util.Arrays;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link TraceId}. */
@RunWith(JUnit4.class)
public class TraceIdTest {
private static final byte[] firstBytes =
new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'a'};
private static final byte[] secondBytes =
new byte[] {(byte) 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'A'};
private static final TraceId first = TraceId.fromBytes(firstBytes);
private static final TraceId second = TraceId.fromBytes(secondBytes);
@Test
public void invalidTraceId() {
assertThat(TraceId.INVALID.getBytes()).isEqualTo(new byte[16]);
}
@Test
public void isValid() {
assertThat(TraceId.INVALID.isValid()).isFalse();
assertThat(first.isValid()).isTrue();
assertThat(second.isValid()).isTrue();
}
@Test
public void getBytes() {
assertThat(first.getBytes()).isEqualTo(firstBytes);
assertThat(second.getBytes()).isEqualTo(secondBytes);
}
@Test
public void fromLowerBase16() {
assertThat(TraceId.fromLowerBase16("00000000000000000000000000000000"))
.isEqualTo(TraceId.INVALID);
assertThat(TraceId.fromLowerBase16("00000000000000000000000000000061")).isEqualTo(first);
assertThat(TraceId.fromLowerBase16("ff000000000000000000000000000041")).isEqualTo(second);
}
@Test
public void toLowerBase16() {
assertThat(TraceId.INVALID.toLowerBase16()).isEqualTo("00000000000000000000000000000000");
assertThat(first.toLowerBase16()).isEqualTo("00000000000000000000000000000061");
assertThat(second.toLowerBase16()).isEqualTo("ff000000000000000000000000000041");
}
@Test
public void traceId_CompareTo() {
assertThat(first.compareTo(second)).isGreaterThan(0);
assertThat(second.compareTo(first)).isLessThan(0);
assertThat(first.compareTo(TraceId.fromBytes(firstBytes))).isEqualTo(0);
}
@Test
public void traceId_EqualsAndHashCode() {
EqualsTester tester = new EqualsTester();
tester.addEqualityGroup(TraceId.INVALID, TraceId.INVALID);
tester.addEqualityGroup(first, TraceId.fromBytes(Arrays.copyOf(firstBytes, firstBytes.length)));
tester.addEqualityGroup(
second, TraceId.fromBytes(Arrays.copyOf(secondBytes, secondBytes.length)));
tester.testEquals();
}
@Test
public void traceId_ToString() {
assertThat(TraceId.INVALID.toString()).contains("00000000000000000000000000000000");
assertThat(first.toString()).contains("00000000000000000000000000000061");
assertThat(second.toString()).contains("ff000000000000000000000000000041");
}
}
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