diff options
Diffstat (limited to 'impl_core/src/test/java/io/opencensus/implcore/metrics/export/MetricProducerManagerImplTest.java')
-rw-r--r-- | impl_core/src/test/java/io/opencensus/implcore/metrics/export/MetricProducerManagerImplTest.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/impl_core/src/test/java/io/opencensus/implcore/metrics/export/MetricProducerManagerImplTest.java b/impl_core/src/test/java/io/opencensus/implcore/metrics/export/MetricProducerManagerImplTest.java new file mode 100644 index 00000000..e549dadb --- /dev/null +++ b/impl_core/src/test/java/io/opencensus/implcore/metrics/export/MetricProducerManagerImplTest.java @@ -0,0 +1,115 @@ +/* + * 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.metrics.export; + +import static com.google.common.truth.Truth.assertThat; + +import io.opencensus.metrics.export.MetricProducer; +import io.opencensus.metrics.export.MetricProducerManager; +import java.util.Set; +import org.junit.Before; +import org.junit.Rule; +import org.junit.Test; +import org.junit.rules.ExpectedException; +import org.junit.runner.RunWith; +import org.junit.runners.JUnit4; +import org.mockito.Mock; +import org.mockito.MockitoAnnotations; + +/** Unit tests for {@link MetricProducerManagerImpl}. */ +@RunWith(JUnit4.class) +public class MetricProducerManagerImplTest { + + private final MetricProducerManager metricProducerManager = new MetricProducerManagerImpl(); + @Mock private MetricProducer metricProducer; + @Mock private MetricProducer metricProducerOther; + + @Rule public final ExpectedException thrown = ExpectedException.none(); + + @Before + public void setUp() { + MockitoAnnotations.initMocks(this); + } + + @Test + public void add_DisallowsNull() { + thrown.expect(NullPointerException.class); + metricProducerManager.add(null); + } + + @Test + public void add() { + metricProducerManager.add(metricProducer); + assertThat(metricProducerManager.getAllMetricProducer()).containsExactly(metricProducer); + } + + @Test + public void add_DuplicateElement() { + metricProducerManager.add(metricProducer); + Set<MetricProducer> metricProducerSet = metricProducerManager.getAllMetricProducer(); + assertThat(metricProducerSet).containsExactly(metricProducer); + metricProducerManager.add(metricProducer); + // Returns the same object. + assertThat(metricProducerManager.getAllMetricProducer()).isSameAs(metricProducerSet); + } + + @Test + public void add_MultipleElements() { + metricProducerManager.add(metricProducer); + Set<MetricProducer> metricProducerSet = metricProducerManager.getAllMetricProducer(); + assertThat(metricProducerSet).containsExactly(metricProducer); + metricProducerManager.add(metricProducerOther); + // Returns the same object. + assertThat(metricProducerManager.getAllMetricProducer()) + .containsExactly(metricProducer, metricProducerOther); + } + + @Test + public void addAndRemove() { + metricProducerManager.add(metricProducer); + assertThat(metricProducerManager.getAllMetricProducer()).containsExactly(metricProducer); + metricProducerManager.remove(metricProducer); + assertThat(metricProducerManager.getAllMetricProducer()).isEmpty(); + } + + @Test + public void remove_DisallowsNull() { + thrown.expect(NullPointerException.class); + metricProducerManager.remove(null); + } + + @Test + public void remove_FromEmpty() { + metricProducerManager.remove(metricProducer); + assertThat(metricProducerManager.getAllMetricProducer()).isEmpty(); + } + + @Test + public void remove_NotPresent() { + metricProducerManager.add(metricProducer); + Set<MetricProducer> metricProducerSet = metricProducerManager.getAllMetricProducer(); + assertThat(metricProducerSet).containsExactly(metricProducer); + metricProducerManager.remove(metricProducerOther); + // Returns the same object. + assertThat(metricProducerManager.getAllMetricProducer()).isSameAs(metricProducerSet); + } + + @Test + public void getAllMetricProducer_empty() { + assertThat(metricProducerManager.getAllMetricProducer()).isEmpty(); + } +} |