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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.collect.Lists;
import io.opencensus.internal.NoopScope;
import io.opencensus.tags.propagation.TagContextBinarySerializer;
import io.opencensus.tags.propagation.TagContextDeserializationException;
import io.opencensus.tags.propagation.TagContextSerializationException;
import java.util.Arrays;
import java.util.Iterator;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link NoopTags}. */
@RunWith(JUnit4.class)
public final class NoopTagsTest {
private static final TagKey KEY = TagKey.create("key");
private static final TagValue VALUE = TagValue.create("value");
private static final TagContext TAG_CONTEXT =
new TagContext() {
@Override
protected Iterator<Tag> getIterator() {
return Arrays.<Tag>asList(Tag.create(KEY, VALUE)).iterator();
}
};
@Rule public final ExpectedException thrown = ExpectedException.none();
@Test
public void noopTagsComponent() {
assertThat(NoopTags.newNoopTagsComponent().getTagger()).isSameAs(NoopTags.getNoopTagger());
assertThat(NoopTags.newNoopTagsComponent().getTagPropagationComponent())
.isSameAs(NoopTags.getNoopTagPropagationComponent());
}
@Test
@SuppressWarnings("deprecation")
public void noopTagsComponent_SetState_DisallowsNull() {
TagsComponent noopTagsComponent = NoopTags.newNoopTagsComponent();
thrown.expect(NullPointerException.class);
noopTagsComponent.setState(null);
}
@Test
@SuppressWarnings("deprecation")
public void preventSettingStateAfterGettingState_DifferentState() {
TagsComponent noopTagsComponent = NoopTags.newNoopTagsComponent();
noopTagsComponent.setState(TaggingState.DISABLED);
noopTagsComponent.getState();
thrown.expect(IllegalStateException.class);
thrown.expectMessage("State was already read, cannot set state.");
noopTagsComponent.setState(TaggingState.ENABLED);
}
@Test
@SuppressWarnings("deprecation")
public void preventSettingStateAfterGettingState_SameState() {
TagsComponent noopTagsComponent = NoopTags.newNoopTagsComponent();
noopTagsComponent.setState(TaggingState.DISABLED);
noopTagsComponent.getState();
thrown.expect(IllegalStateException.class);
thrown.expectMessage("State was already read, cannot set state.");
noopTagsComponent.setState(TaggingState.DISABLED);
}
@Test
public void noopTagger() {
Tagger noopTagger = NoopTags.getNoopTagger();
assertThat(noopTagger.empty()).isSameAs(NoopTags.getNoopTagContext());
assertThat(noopTagger.getCurrentTagContext()).isSameAs(NoopTags.getNoopTagContext());
assertThat(noopTagger.emptyBuilder()).isSameAs(NoopTags.getNoopTagContextBuilder());
assertThat(noopTagger.toBuilder(TAG_CONTEXT)).isSameAs(NoopTags.getNoopTagContextBuilder());
assertThat(noopTagger.currentBuilder()).isSameAs(NoopTags.getNoopTagContextBuilder());
assertThat(noopTagger.withTagContext(TAG_CONTEXT)).isSameAs(NoopScope.getInstance());
}
@Test
public void noopTagger_ToBuilder_DisallowsNull() {
Tagger noopTagger = NoopTags.getNoopTagger();
thrown.expect(NullPointerException.class);
noopTagger.toBuilder(null);
}
@Test
public void noopTagger_WithTagContext_DisallowsNull() {
Tagger noopTagger = NoopTags.getNoopTagger();
thrown.expect(NullPointerException.class);
noopTagger.withTagContext(null);
}
@Test
public void noopTagContextBuilder() {
assertThat(NoopTags.getNoopTagContextBuilder().build()).isSameAs(NoopTags.getNoopTagContext());
assertThat(NoopTags.getNoopTagContextBuilder().put(KEY, VALUE).build())
.isSameAs(NoopTags.getNoopTagContext());
assertThat(NoopTags.getNoopTagContextBuilder().buildScoped()).isSameAs(NoopScope.getInstance());
assertThat(NoopTags.getNoopTagContextBuilder().put(KEY, VALUE).buildScoped())
.isSameAs(NoopScope.getInstance());
}
@Test
public void noopTagContextBuilder_Put_DisallowsNullKey() {
TagContextBuilder noopBuilder = NoopTags.getNoopTagContextBuilder();
thrown.expect(NullPointerException.class);
noopBuilder.put(null, VALUE);
}
@Test
public void noopTagContextBuilder_Put_DisallowsNullValue() {
TagContextBuilder noopBuilder = NoopTags.getNoopTagContextBuilder();
thrown.expect(NullPointerException.class);
noopBuilder.put(KEY, null);
}
@Test
public void noopTagContextBuilder_Remove_DisallowsNullKey() {
TagContextBuilder noopBuilder = NoopTags.getNoopTagContextBuilder();
thrown.expect(NullPointerException.class);
noopBuilder.remove(null);
}
@Test
public void noopTagContext() {
assertThat(Lists.newArrayList(NoopTags.getNoopTagContext().getIterator())).isEmpty();
}
@Test
public void noopTagPropagationComponent() {
assertThat(NoopTags.getNoopTagPropagationComponent().getBinarySerializer())
.isSameAs(NoopTags.getNoopTagContextBinarySerializer());
}
@Test
public void noopTagContextBinarySerializer()
throws TagContextDeserializationException, TagContextSerializationException {
assertThat(NoopTags.getNoopTagContextBinarySerializer().toByteArray(TAG_CONTEXT))
.isEqualTo(new byte[0]);
assertThat(NoopTags.getNoopTagContextBinarySerializer().fromByteArray(new byte[5]))
.isEqualTo(NoopTags.getNoopTagContext());
}
@Test
public void noopTagContextBinarySerializer_ToByteArray_DisallowsNull()
throws TagContextSerializationException {
TagContextBinarySerializer noopSerializer = NoopTags.getNoopTagContextBinarySerializer();
thrown.expect(NullPointerException.class);
noopSerializer.toByteArray(null);
}
@Test
public void noopTagContextBinarySerializer_FromByteArray_DisallowsNull()
throws TagContextDeserializationException {
TagContextBinarySerializer noopSerializer = NoopTags.getNoopTagContextBinarySerializer();
thrown.expect(NullPointerException.class);
noopSerializer.fromByteArray(null);
}
}
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