org.junit.jupiter.params.provider.NullArgumentsProvider Maven / Gradle / Ivy
/*
* Copyright 2015-2020 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 v2.0 which
* accompanies this distribution and is available at
*
* https://www.eclipse.org/legal/epl-v20.html
*/
package org.junit.jupiter.params.provider;
import static org.junit.jupiter.params.provider.Arguments.arguments;
import java.lang.reflect.Method;
import java.util.stream.Stream;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.platform.commons.util.Preconditions;
/**
* @since 5.4
* @see NullSource
*/
class NullArgumentsProvider implements ArgumentsProvider {
private static final Arguments nullArguments = arguments(new Object[] { null });
@Override
public Stream provideArguments(ExtensionContext context) {
Method testMethod = context.getRequiredTestMethod();
Preconditions.condition(testMethod.getParameterCount() > 0, () -> String.format(
"@NullSource cannot provide a null argument to method [%s]: the method does not declare any formal parameters.",
testMethod.toGenericString()));
return Stream.of(nullArguments);
}
}