System Rules 更好的测试

1:编写测试事例时候,我们要从控制台拿到数据与断言进行对比,通常要编写jdk 标准输出的屏蔽控制器.文章标题的包,能够更好的为我们进行工作.

package demo2;

import static org.junit.Assert.assertEquals;

import org.junit.Rule;

import org.junit.Test;

import org.junit.contrib.java.lang.system.StandardOutputStreamLog;

import org.junit.contrib.java.lang.system.SystemErrRule;

import org.junit.contrib.java.lang.system.SystemOutRule;

public class demo1 {

	@Rule // 过去写法

	private final StandardOutputStreamLog log=new StandardOutputStreamLog();

	//正确输出

	@Rule

	private final SystemOutRule sRule=new SystemOutRule();

	//错误输出

	@Rule

	private final SystemErrRule errrule=new SystemErrRule();

	@Test

	public void miantest() {

		sysou();

		assertEquals(2, sRule.getLog());

	}

	private void sysou() {

		System.out.println(2);

	}

}

其实使用事例介绍

Clear Properties

public class MyTest {

	@Rule

	public final ClearSystemProperties myPropertyIsCleared

	 = new ClearSystemProperties("MyProperty");

	@Test

	public void overrideProperty() {

		assertNull(System.getProperty("MyProperty"));

	}

}

Provide Properties

public class MyTest {

	@Rule

	public final ProvideSystemProperty myPropertyHasMyValue

	 = new ProvideSystemProperty("MyProperty", "MyValue");

	@Rule

	public final ProvideSystemProperty otherPropertyIsMissing

	 = new ProvideSystemProperty("OtherProperty", null);

	@Test

	public void overrideProperty() {

		assertEquals("MyValue", System.getProperty("MyProperty"));

		assertNull(System.getProperty("OtherProperty"));

	}

}

巴特西

System Rules 更好的测试

最新文章

热门文章