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ImmutablePipelineTest.java
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ImmutablePipelineTest.java
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/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.placeholders;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import java.util.Arrays;
import java.util.List;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.junit.MockitoJUnitRunner;
import org.mutabilitydetector.unittesting.AllowedReason;
import org.mutabilitydetector.unittesting.MutabilityAssert;
import org.mutabilitydetector.unittesting.MutabilityMatchers;
import nl.jqno.equalsverifier.EqualsVerifier;
/**
* Tests {@link ImmutablePipeline}.
*/
@RunWith(MockitoJUnitRunner.class)
public class ImmutablePipelineTest {
private static final List<String> STAGES = Arrays.asList(
"thing:name",
"fn:substring-before(':')",
"fn:default(thing:id)"
);
private static final List<String> INVALID_STAGES = Arrays.asList(
"thing:name",
"fn:substring-before(':')",
"fn:unknown('foo')"
);
private static final PipelineElement PIPELINE_INPUT = PipelineElement.resolved("my-gateway:my-thing");
private static final List<PipelineElement> RESPONSES = Arrays.asList(
PipelineElement.resolved("my-gateway"),
PipelineElement.resolved("my-gateway")
);
@Mock
private FunctionExpression functionExpression;
@Mock
private ExpressionResolver expressionResolver;
@Test
public void assertImmutability() {
MutabilityAssert.assertInstancesOf(ImmutablePipeline.class, MutabilityMatchers.areImmutable(),
AllowedReason.provided(FunctionExpression.class).isAlsoImmutable());
}
@Test
public void testHashCodeAndEquals() {
EqualsVerifier.forClass(ImmutablePipeline.class)
.usingGetClass()
.verify();
}
@Test
public void execute() {
prepareFunctionExpressionResponses();
final ImmutablePipeline pipeline = new ImmutablePipeline(functionExpression, STAGES);
final PipelineElement result = pipeline.execute(PIPELINE_INPUT, expressionResolver);
verifyResultEqualsLastResponse(result);
verifyFunctionExpressionWasCalledWithIntermediateValues();
}
@Test(expected = PlaceholderFunctionUnknownException.class)
public void validate() {
prepareFunctionExpressionResponses();
final ImmutablePipeline pipeline = new ImmutablePipeline(functionExpression, INVALID_STAGES);
pipeline.validate();
}
private void prepareFunctionExpressionResponses() {
Mockito.when(functionExpression.resolve(anyString(), any(PipelineElement.class), any(ExpressionResolver.class)))
.thenReturn(RESPONSES.get(0), RESPONSES.get(1));
}
private void verifyResultEqualsLastResponse(final PipelineElement result) {
assertThat(result).isEqualTo(RESPONSES.get(1));
}
private void verifyFunctionExpressionWasCalledWithIntermediateValues() {
Mockito.verify(functionExpression)
.resolve(STAGES.get(0), PIPELINE_INPUT, expressionResolver);
Mockito.verify(functionExpression)
.resolve(STAGES.get(1), RESPONSES.get(0), expressionResolver);
Mockito.verify(functionExpression)
.resolve(STAGES.get(2), RESPONSES.get(1), expressionResolver);
Mockito.verifyNoMoreInteractions(functionExpression);
}
}