Assumptions

JUnit Jupiter附带了JUnit 4提供的假设方法的一个子集，并添加了一些可以很好地用于Java 8 lambdas的假设方法。

所有的JUnit Jupiter假设都是在 org.junit.jupiter.api.Assumptions 的静态方法。

实例

  • AssumptionsDemo.java
  [java]
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package com.github.houbb.jdk.junit5;

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 org.junit.jupiter.api.Test;

/**
 * @author houbinbin
 * @version 1.0
 * @since JDK 1.7
 */
public class AssumptionsDemo {

    @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, 2);
                });

        // perform these assertions in all environments
        assertEquals("a string", "a string");
    }
}