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/*
* Copyright 2017, 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.tags;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.testing.EqualsTester;
import java.util.Arrays;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link TagValue}. */
@RunWith(JUnit4.class)
public final class TagValueTest {
@Rule public final ExpectedException thrown = ExpectedException.none();
@Test
public void testMaxLength() {
assertThat(TagValue.MAX_LENGTH).isEqualTo(255);
}
@Test
public void testAsString() {
assertThat(TagValue.create("foo").asString()).isEqualTo("foo");
}
@Test
public void create_AllowTagValueWithMaxLength() {
char[] chars = new char[TagValue.MAX_LENGTH];
Arrays.fill(chars, 'v');
String value = new String(chars);
assertThat(TagValue.create(value).asString()).isEqualTo(value);
}
@Test
public void create_DisallowTagValueOverMaxLength() {
char[] chars = new char[TagValue.MAX_LENGTH + 1];
Arrays.fill(chars, 'v');
String value = new String(chars);
thrown.expect(IllegalArgumentException.class);
TagValue.create(value);
}
@Test
public void disallowTagValueWithUnprintableChars() {
String value = "\2ab\3cd";
thrown.expect(IllegalArgumentException.class);
TagValue.create(value);
}
@Test
public void testTagValueEquals() {
new EqualsTester()
.addEqualityGroup(TagValue.create("foo"), TagValue.create("foo"))
.addEqualityGroup(TagValue.create("bar"))
.testEquals();
}
}
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