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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.stats;
import static com.google.common.truth.Truth.assertThat;
import io.opencensus.stats.Measure.MeasureDouble;
import io.opencensus.tags.Tag;
import io.opencensus.tags.TagContext;
import io.opencensus.tags.TagKey;
import io.opencensus.tags.TagValue;
import java.util.Collections;
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 NoopStats}. Tests for {@link NoopStats#newNoopViewManager} are in {@link
* NoopViewManagerTest}
*/
@RunWith(JUnit4.class)
public final class NoopStatsTest {
private static final Tag TAG = Tag.create(TagKey.create("key"), TagValue.create("value"));
private static final MeasureDouble MEASURE =
Measure.MeasureDouble.create("my measure", "description", "s");
private final TagContext tagContext =
new TagContext() {
@Override
protected Iterator<Tag> getIterator() {
return Collections.<Tag>singleton(TAG).iterator();
}
};
@Rule public final ExpectedException thrown = ExpectedException.none();
@Test
public void noopStatsComponent() {
assertThat(NoopStats.newNoopStatsComponent().getStatsRecorder())
.isSameAs(NoopStats.getNoopStatsRecorder());
assertThat(NoopStats.newNoopStatsComponent().getViewManager())
.isInstanceOf(NoopStats.newNoopViewManager().getClass());
}
@Test
public void noopStatsComponent_GetState() {
assertThat(NoopStats.newNoopStatsComponent().getState())
.isEqualTo(StatsCollectionState.DISABLED);
}
@Test
@SuppressWarnings("deprecation")
public void noopStatsComponent_SetState_IgnoresInput() {
StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent();
noopStatsComponent.setState(StatsCollectionState.ENABLED);
assertThat(noopStatsComponent.getState()).isEqualTo(StatsCollectionState.DISABLED);
}
@Test
@SuppressWarnings("deprecation")
public void noopStatsComponent_SetState_DisallowsNull() {
StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent();
thrown.expect(NullPointerException.class);
noopStatsComponent.setState(null);
}
@Test
@SuppressWarnings("deprecation")
public void noopStatsComponent_DisallowsSetStateAfterGetState() {
StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent();
noopStatsComponent.setState(StatsCollectionState.DISABLED);
noopStatsComponent.getState();
thrown.expect(IllegalStateException.class);
thrown.expectMessage("State was already read, cannot set state.");
noopStatsComponent.setState(StatsCollectionState.ENABLED);
}
@Test
public void noopStatsRecorder_PutAttachmentNullKey() {
MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap();
thrown.expect(NullPointerException.class);
thrown.expectMessage("key");
measureMap.putAttachment(null, "value");
}
@Test
public void noopStatsRecorder_PutAttachmentNullValue() {
MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap();
thrown.expect(NullPointerException.class);
thrown.expectMessage("value");
measureMap.putAttachment("key", null);
}
// The NoopStatsRecorder should do nothing, so this test just checks that record doesn't throw an
// exception.
@Test
public void noopStatsRecorder_Record() {
NoopStats.getNoopStatsRecorder().newMeasureMap().put(MEASURE, 5).record(tagContext);
}
// The NoopStatsRecorder should do nothing, so this test just checks that record doesn't throw an
// exception.
@Test
public void noopStatsRecorder_RecordWithCurrentContext() {
NoopStats.getNoopStatsRecorder().newMeasureMap().put(MEASURE, 6).record();
}
@Test
public void noopStatsRecorder_Record_DisallowNullTagContext() {
MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap();
thrown.expect(NullPointerException.class);
thrown.expectMessage("tags");
measureMap.record(null);
}
}
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