如何使用junit ExpectedException？
[英]How to work with junit ExpectedException?
问题描述
I'm trying to work with ExpectedExceptions for JUnit. 
我正在尝试使用ExpectedExceptions for JUnit。 I tried already this: 我已经尝试了这个：
public class ExpectedTest {
@Rule
public ExpectedException thrown = ExpectedException.none();
@Test
public void test() {
thrown.expect(NullPointerException.class);
throw new NullPointerException();
}
}
which raises me the following Exception: 这引起了我以下异常：
java.lang.NoClassDefFoundError: org/hamcrest/TypeSafeMatcher at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at org.junit.matchers.JUnitMatchers.isThrowable(JUnitMatchers.java:103) at org.junit.rules.ExpectedExceptionMatcherBuilder.build(ExpectedExceptionMatcherBuilder.java:27) at org.junit.rules.ExpectedException.
When I do it like this: 当我这样做时：
public class ExpectedTest {
@Rule
public ExpectedException thrown;
@Before
public void setup() {
thrown = ExpectedException.none();
}
@Test
public void test() {
thrown.expect(NullPointerException.class);
throw new NullPointerException();
}
}
I get a simple NullPointerException! 我得到一个简单的NullPointerException！ What am I doing wrong? 我究竟做错了什么？
3 个解决方案
解决方案1
3 已采纳 2014-04-10 13:40:04
java.lang.NoClassDefFoundError: org/hamcrest/TypeSafeMatcher建议你应该确保hamcrest-core在运行时类路径上，或者如果它丢失则添加它
解决方案2
2 2014-10-28 12:21:53
You need following dependency 你需要以下依赖
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
解决方案3
0 2014-04-10 13:22:25
在应该抛出异常的测试中尝试这个：
@Test(expected = NullPointerException.class)
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