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TestDiscoveryRequestBuilder.java
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TestDiscoveryRequestBuilder.java
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/*
* Copyright 2015-2016 the original author or authors.
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution and is available at
*
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.junit.gen5.launcher.main;
import static org.junit.gen5.commons.meta.API.Usage.Experimental;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.junit.gen5.commons.meta.API;
import org.junit.gen5.commons.util.PreconditionViolationException;
import org.junit.gen5.commons.util.Preconditions;
import org.junit.gen5.engine.DiscoveryFilter;
import org.junit.gen5.engine.DiscoverySelector;
import org.junit.gen5.engine.Filter;
import org.junit.gen5.launcher.EngineIdFilter;
import org.junit.gen5.launcher.PostDiscoveryFilter;
import org.junit.gen5.launcher.TestDiscoveryRequest;
/**
* The {@code TestDiscoveryRequestBuilder} provides a light-weight DSL for
* generating a {@link TestDiscoveryRequest}.
*
* <h4>Example</h4>
*
* <pre style="code">
* TestDiscoveryRequestBuilder.request()
* .select(
* forPackageName("org.junit.gen5"),
* forPackageName("com.junit.samples"),
* forClass(TestDescriptorTests.class),
* forClassName("com.junit.samples.SampleTestCase"),
* forTestMethod("com.junit.samples.SampleTestCase", "test2"),
* forTestMethod(TestDescriptorTests.class, "test1"),
* forTestMethod(TestDescriptorTests.class, "test1"),
* forTestMethod(TestDescriptorTests.class, "testWithParams", ParameterType.class),
* forTestMethod(TestDescriptorTests.class, testMethod),
* forPath("/my/local/path1"),
* forPath("/my/local/path2"),
* forUniqueId("unique-id-1"),
* forUniqueId("unique-id-2")
* )
* .filter(byEngineIds("junit5"))
* .filter(byNamePattern("org\.junit\.gen5\.tests.*"), byNamePattern(".*Test[s]?"))
* .filter(requireTags("fast"), excludeTags("flow"))
* .configurationParameter("key1", "value1")
* .configurationParameters(configParameterMap)
* ).build();
* </pre>
*
* @since 5.0
*/
@API(Experimental)
public final class TestDiscoveryRequestBuilder {
private List<DiscoverySelector> selectors = new LinkedList<>();
private List<EngineIdFilter> engineIdFilters = new LinkedList<>();
private List<DiscoveryFilter<?>> discoveryFilters = new LinkedList<>();
private List<PostDiscoveryFilter> postDiscoveryFilters = new LinkedList<>();
private Map<String, String> configurationParameters = new HashMap<>();
/**
* Create a new {@code TestDiscoveryRequestBuilder}.
*/
public static TestDiscoveryRequestBuilder request() {
return new TestDiscoveryRequestBuilder();
}
/**
* Add all of the supplied {@code selectors} to the request.
*/
public TestDiscoveryRequestBuilder select(DiscoverySelector... selectors) {
if (selectors != null) {
select(Arrays.asList(selectors));
}
return this;
}
/**
* Add all of the supplied {@code selectors} to the request.
*/
public TestDiscoveryRequestBuilder select(List<DiscoverySelector> selectors) {
if (selectors != null) {
this.selectors.addAll(selectors);
}
return this;
}
/**
* Add all of the supplied {@code filters} to the request.
*/
public TestDiscoveryRequestBuilder filter(Filter<?>... filters) {
if (filters != null) {
Arrays.stream(filters).forEach(this::storeFilter);
}
return this;
}
/**
* Add the supplied <em>configuration parameter</em> to the request.
*/
public TestDiscoveryRequestBuilder configurationParameter(String key, String value) {
Preconditions.notBlank(key, "configuration parameter key must not be null or empty");
this.configurationParameters.put(key, value);
return this;
}
/**
* Add all of the supplied {@code configurationParameters} to the request.
*/
public TestDiscoveryRequestBuilder configurationParameters(Map<String, String> configurationParameters) {
if (configurationParameters != null) {
configurationParameters.forEach(this::configurationParameter);
}
return this;
}
private void storeFilter(Filter<?> filter) {
if (filter instanceof EngineIdFilter) {
this.engineIdFilters.add((EngineIdFilter) filter);
}
else if (filter instanceof PostDiscoveryFilter) {
this.postDiscoveryFilters.add((PostDiscoveryFilter) filter);
}
else if (filter instanceof DiscoveryFilter<?>) {
this.discoveryFilters.add((DiscoveryFilter<?>) filter);
}
else {
throw new PreconditionViolationException("Filter must implement " + EngineIdFilter.class.getSimpleName()
+ ", " + PostDiscoveryFilter.class.getSimpleName() //
+ ", or " + DiscoveryFilter.class.getSimpleName() + ".");
}
}
/**
* Build the {@link TestDiscoveryRequest} that has been configured via
* this builder.
*/
public TestDiscoveryRequest build() {
DiscoveryRequest discoveryRequest = new DiscoveryRequest();
discoveryRequest.addSelectors(this.selectors);
discoveryRequest.addEngineIdFilters(this.engineIdFilters);
discoveryRequest.addFilters(this.discoveryFilters);
discoveryRequest.addPostFilters(this.postDiscoveryFilters);
discoveryRequest.addConfigurationParameters(this.configurationParameters);
return discoveryRequest;
}
}