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/*
* Copyright 2018, 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.implcore.temporary.metrics;
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 LabelKey}. */
@RunWith(JUnit4.class)
public class LabelKeyTest {
private static final LabelKey KEY = LabelKey.create("key", "description");
@Test
public void testGetKey() {
assertThat(KEY.getKey()).isEqualTo("key");
}
@Test
public void testGetDescription() {
assertThat(KEY.getDescription()).isEqualTo("description");
}
@Test
public void create_NoLengthConstraint() {
// We have a length constraint of 256-characters for TagKey. That constraint doesn't apply to
// LabelKey.
char[] chars = new char[300];
Arrays.fill(chars, 'k');
String key = new String(chars);
assertThat(LabelKey.create(key, "").getKey()).isEqualTo(key);
}
@Test
public void create_WithUnprintableChars() {
String key = "\2ab\3cd";
String description = "\4ef\5gh";
LabelKey labelKey = LabelKey.create(key, description);
assertThat(labelKey.getKey()).isEqualTo(key);
assertThat(labelKey.getDescription()).isEqualTo(description);
}
@Test
public void create_WithNonAsciiChars() {
String key = "键";
String description = "测试用键";
LabelKey nonAsciiKey = LabelKey.create(key, description);
assertThat(nonAsciiKey.getKey()).isEqualTo(key);
assertThat(nonAsciiKey.getDescription()).isEqualTo(description);
}
@Test
public void create_Empty() {
LabelKey emptyKey = LabelKey.create("", "");
assertThat(emptyKey.getKey()).isEmpty();
assertThat(emptyKey.getDescription()).isEmpty();
}
@Test
public void testLabelKeyEquals() {
new EqualsTester()
.addEqualityGroup(LabelKey.create("foo", ""), LabelKey.create("foo", ""))
.addEqualityGroup(LabelKey.create("foo", "description"))
.addEqualityGroup(LabelKey.create("bar", ""))
.testEquals();
}
}
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