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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.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 LabelValue}. */
@RunWith(JUnit4.class)
public class LabelValueTest {
private static final LabelValue VALUE = LabelValue.create("value");
private static final LabelValue UNSET = LabelValue.create(null);
private static final LabelValue EMPTY = LabelValue.create("");
@Test
public void testGetValue() {
assertThat(VALUE.getValue()).isEqualTo("value");
assertThat(UNSET.getValue()).isNull();
assertThat(EMPTY.getValue()).isEmpty();
}
@Test
public void create_NoLengthConstraint() {
// We have a length constraint of 256-characters for TagValue. That constraint doesn't apply to
// LabelValue.
char[] chars = new char[300];
Arrays.fill(chars, 'v');
String value = new String(chars);
assertThat(LabelValue.create(value).getValue()).isEqualTo(value);
}
@Test
public void create_WithUnprintableChars() {
String value = "\2ab\3cd";
assertThat(LabelValue.create(value).getValue()).isEqualTo(value);
}
@Test
public void create_WithNonAsciiChars() {
String value = "值";
LabelValue nonAsciiValue = LabelValue.create(value);
assertThat(nonAsciiValue.getValue()).isEqualTo(value);
}
@Test
public void testLabelValueEquals() {
new EqualsTester()
.addEqualityGroup(LabelValue.create("foo"), LabelValue.create("foo"))
.addEqualityGroup(UNSET)
.addEqualityGroup(EMPTY)
.addEqualityGroup(LabelValue.create("bar"))
.testEquals();
}
}
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