Java 什么是 JUnit @Before 和 @Test
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What are JUnit @Before and @Test
提问by
What is the use of a Junit @Beforeand @Testannotations in java? How can I use them with netbeans?
java中Junit@Before和@Test注解有什么用？我如何将它们与 netbeans 一起使用？
回答by guerda
If I understood you correctly, you want to know, what the annotation
@Beforemeans. The annotation marks a method as to be executed before eachtest will be executed. There you can implement the oldsetup()procedure.The
@Testannotation marks the following method as a JUnit test. The testrunner will identify every method annotated with@Testand executes it. Example:import org.junit.*; public class IntroductionTests { @Test public void testSum() { Assert.assertEquals(8, 6 + 2); } }How can i use it with Netbeans?In Netbeans, a testrunner for JUnit tests is included. You can choose it in your Execute Dialog.
如果我理解正确，您想知道注释的
@Before含义。注释将方法标记为在执行每个测试之前要执行的方法。在那里您可以实施旧setup()程序。该
@Test注释标记以下方法作为JUnit测试。testrunner 将识别每个注释的方法@Test并执行它。例子：import org.junit.*; public class IntroductionTests { @Test public void testSum() { Assert.assertEquals(8, 6 + 2); } }How can i use it with Netbeans?在 Netbeans 中，包含了一个用于 JUnit 测试的测试运行程序。您可以在执行对话框中选择它。
回答by Romain Linsolas
Can you be more precise?
Do you need to understand what are @Beforeand @Testannotation?
你能更准确吗？你需要了解什么是@Before和@Test注解吗？
@Testannotation is an annotation (since JUnit 4) that indicates the attached method is an unit test. That allows you to use any method name to have a test. For example:
@Testannotation 是一个注解（自 JUnit 4 起），表明附加的方法是一个单元测试。这允许您使用任何方法名称进行测试。例如：
@Test
public void doSomeTestOnAMethod() {
// Your test goes here.
...
}
The @Beforeannotation indicates that the attached method will be run beforeany test in the class. It is mainly used to setup some objects needed by your tests:
所述@Before注释指示所连接的方法将被运行之前在类中的任何测试。它主要用于设置您的测试所需的一些对象：
(edited to add imports) :
（编辑添加进口）：
import static org.junit.Assert.*; // Allows you to use directly assert methods, such as assertTrue(...), assertNull(...)
import org.junit.Test; // for @Test
import org.junit.Before; // for @Before
public class MyTest {
private AnyObject anyObject;
@Before
public void initObjects() {
anyObject = new AnyObject();
}
@Test
public void aTestUsingAnyObject() {
// Here, anyObject is not null...
assertNotNull(anyObject);
...
}
}
