documentation/src/test/java/example/AssumptionsDemo.java

/*
 * Copyright 2015-2022 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 example;

// @formatter:off
// tag::user_guide[]

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
import static org.junit.jupiter.api.Assumptions.assumingThat;

import example.util.Calculator;

import org.junit.jupiter.api.Test;

class AssumptionsDemo {

	private final Calculator calculator = new Calculator();

	@Test
	void testOnlyOnCiServer() {
		assumeTrue("CI".equals(System.getenv("ENV")));
		// remainder of test
	}

	@Test
	void testOnlyOnDeveloperWorkstation() {
		assumeTrue("DEV".equals(System.getenv("ENV")),
			() -> "Aborting test: not on developer workstation");
		// remainder of test
	}

	@Test
	void testInAllEnvironments() {
		assumingThat("CI".equals(System.getenv("ENV")),
			() -> {
				// perform these assertions only on the CI server
				assertEquals(2, calculator.divide(4, 2));
			});

		// perform these assertions in all environments
		assertEquals(42, calculator.multiply(6, 7));
	}

}
// end::user_guide[]
// @formatter:on