Java 如何参数化junit测试套件

How to parameterize junit Test Suite

提问by Sergio

Is it possible to parameterize a TestSuite in junit 4 ?

是否可以在 junit 4 中参数化 TestSuite ？

For declaring a class as a test suite I need the annotation @RunWith(Suite.class), but the same annotation is also needed to declare the test as parameterized: @RunWith(Parameterized.class)so I cannot add both to the same class.

为了将类声明为测试套件，我需要 annotation @RunWith(Suite.class)，但也需要相同的 annotation 将测试声明为参数化：@RunWith(Parameterized.class)所以我不能将两者都添加到同一个类中。

I found a similar questionin this site that did not help much. So far, all the examples I have found explain how to parameterize simple unit tests, not a complete test tuite.

我在这个网站上发现了一个类似的问题，但没有多大帮助。到目前为止，我找到的所有示例都解释了如何参数化简单的单元测试，而不是完整的测试教程。

回答by mikemil

I believe the basic answer is No, because as you said, the @RunsWith only take one parameter. I found a blog posting that got a bit creativein how to handle this situation.

我相信基本的答案是否定的，因为正如你所说，@RunsWith 只接受一个参数。我发现一篇博客文章在如何处理这种情况方面有点创意。

We don't use the parameterized tests, but may you could create a separate suite like we do that only lists the test classes and the parameterized test could be part of that. I modified our test suite to include a parameterized test class to part of the suite and it ran fine. We create our suite like below where PrimeNumberCheckerTest was a simple I pulled from the web.

我们不使用参数化测试，但您可以像我们一样创建一个单独的套件，只列出测试类，参数化测试可能是其中的一部分。我修改了我们的测试套件，将参数化测试类包含在套件的一部分中，并且运行良好。我们创建我们的套件，如下所示，其中 PrimeNumberCheckerTest 是我从网上提取的一个简单的。

package com.jda.portfolio.api.rest.server;

import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import org.junit.runners.Suite.SuiteClasses;

@RunWith(Suite.class)
@SuiteClasses({  com.mycompany.api.rest.server.resource.TestCartResourceJava.class, 
                 com.mycompany.api.rest.server.resource.TestCustomerResource.class,
                 com.mycompany.api.rest.server.resource.TestWizardProfileResource.class,
                 com.mycompany.api.rest.server.interceptor.TestBaseSearchInterceptor.class, 
                 com.mycompany.api.rest.server.resource.TestQueryParameters.class, 
                 com.mycompany.api.rest.server.expression.TestCartExpressionGenerator.class, 
                 com.mycompany.api.rest.server.expression.TestPreferenceExpressionGenerator.class, 
                 com.mycompany.api.rest.server.PrimeNumberCheckerTest.class, 
                 })
public class AllTests {}

Here's the source for the parameterized test case;

这是参数化测试用例的来源；

package com.jda.portfolio.api.rest.server:

import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.Collection;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Suite.SuiteClasses;

@RunWith(Parameterized.class)
@SuiteClasses({PrimeNumberCheckerTest.class})
public class PrimeNumberCheckerTest {
  private Integer inputNumber;
  private Boolean expectedResult;
  private PrimeNumberChecker primeNumberChecker;

  @Before
  public void initialize() {
     primeNumberChecker = new PrimeNumberChecker();
  }

  // Each parameter should be placed as an argument here
  // Every time runner triggers, it will pass the arguments
  // from parameters we defined in primeNumbers() method
  public PrimeNumberCheckerTest(Integer inputNumber, 
     Boolean expectedResult) {
     this.inputNumber = inputNumber;
     this.expectedResult = expectedResult;
  }

  @Parameterized.Parameters
  public static Collection primeNumbers() {
     return Arrays.asList(new Object[][] {
        { 2, true },
        { 6, false },
        { 19, true },
        { 22, false },
        { 23, true }
     });
  }

  // This test will run five times since we have as many parameters defined
  @Test
  public void testPrimeNumberChecker() {
     System.out.println("Parameterized Number is : " + inputNumber);
     assertEquals(expectedResult, 
     primeNumberChecker.validate(inputNumber));
  }

回答by Paul Hicks

I agree, it's not possible with the provided classes, but there are workarounds that will get you most of the way there, like @mikemil's.

我同意，提供的类是不可能的，但是有一些解决方法可以让你大部分时间都在那里，比如@mikemil。

I've spent some time extending Suite and delegating to Parameterized, with partial success; it is possible to build runner that does what you want, and the code is more-or-less written for you in those two classes. The way those classes interact (in particular, the definition of Parameterized#getChildren()) makes it difficult to extend or delegate to those classes to accomplish what you need, but creating a whole new class than extends ParentRunnerand lifts code from the other two would be fairly easy.

我花了一些时间扩展 Suite 并委托给 Parameterized，取得了部分成功；可以构建执行您想要的运行程序，并且在这两个类中或多或少地为您编写了代码。这些类交互的方式（特别是 的定义Parameterized#getChildren()）使得扩展或委托给这些类来完成您需要的事情变得困难，但是创建一个全新的类而不是ParentRunner从其他两个类中扩展和提升代码会相当容易。

I'll try to get more time to come back to this later. If you do build a new runner before I get around to it, please post it as an answer, I'd love to use it myself.

稍后我会争取更多时间来讨论这个问题。如果您确实在我开始使用它之前构建了一个新的跑步者，请将其作为答案发布，我很乐意自己使用它。

回答by Alicia

I was able to parameterize a test suite and use its data in a test class member of the suite as follows:

我能够参数化测试套件并在套件的测试类成员中使用其数据，如下所示：

In JUTsuite:

在 JUTsuite 中：

@RunWith(Suite.class)
@Suite.SuiteClasses({ 
    JUT_test1.class,
})

public class JUTSuite{  
    // Declare all variables/objects you want to share with the test classes, e.g.
    protected static List<Fx> globalFxs;
    // This is the data list we'll use as parameters
    protected static List<Dx> globalDxs;

    @Parameters
    public static Collection<Object[]> data(){
        // Instantiate object list for parameters.  
        // Note: you must do it here and not in, say, @BeforeClass setup()
        // e.g.
        globalDxs=new ArrayList<Dx>(serverObj.values());

        Collection<Object[]> rows=new ArrayList<Object[]>();
        for(Dx d:globalDxs) {
            rows.add(new Object[]{d});
        }
        return rows;
    }

    @BeforeClass
    public static void setUp() throws Exception {
        // Instantiate/initialize all suite variables/objects to be shares with test classes
        // e.g. globalFxs=new ArrayList<Fx>();
    }

    @AfterClass
    public static void tearDown() throws Exception {
        // Clean up....
    }
}

Next, in test class:

接下来，在测试类中：

@RunWith(Parameterized.class)
public class JUT_test1 {
    // declare local names (if desired) for suite-wide variable/objects 
    // e.g. 
    private static List<Fx> globalFxs;

    // This is the test parameter:      
    private Dx d;

    public JUT_test1(Dx d){
        this.d=d;
    }

    @Parameters
    public static Collection<Object[]> data(){
    // Note: we're calling the suite's data() method which has already executed.
        return JUTSuite.data();
    }

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
    // (If desired)initialize local variables by referencing suite variables.
    // e.g.globalFxs=JUTSuite.globalFxs;
    }
}

回答by Peter Wippermann

You're right: Both Suiteand Parameterizedare Runners and only one Runnermay be used to run a test at a time. Standard JUnit 4 doesn't provide a combined Runner.

您是对的：Suite和Parameterized都是 Runners，并且一次只能使用一个Runner来运行测试。标准 JUnit 4 不提供组合的 Runner。

You can either implement your own Runner or have a look at this ready-to-use library which provides a ParameterizedSuiteRunner: https://github.com/PeterWippermann/parameterized-suite

您可以实现自己的 Runner 或查看这个提供ParameterizedSuiteRunner 的即用型库：https: //github.com/PeterWippermann/parameterized-suite

A parameterized test suite looks like this:

参数化测试套件如下所示：

@RunWith(ParameterizedSuite.class)
@SuiteClasses({OneTest.class, TwoTest.class})
public class MyParameterizedTestSuite {
    @Parameters(name = "Parameters are {0} and {1}")
    public static Object[] params() {
        return new Object[][] {{'A',1}, {'B',2}, {'C',3}};
    }

回答by Shantonu

the best solution will be, keep suit classes separately in a blank class. For example, I am testing logins as Parameterized tests and putting in a suit (for navigation performance measurement)

最好的解决方案是，将西装类单独保存在一个空白类中。例如，我正在测试登录作为参数化测试并穿上西装（用于导航性能测量）

     @RunWith(Suite.class)
@Suite.SuiteClasses({
            LoginPageTest.class,
            HomePageTests.class})
    public class PerformanceTests {
    }

and LoginPageTest is actually Parameterizedtests

而 LoginPageTest 实际上是 Parameterizedtests

@RunWith(Parameterized.class)
public class LoginPageTest
{...}

回答by Markus Mitterauer

As already stated multiple times, it's not possible to parameterize a test suite with the runners provided by JUnit 4.

正如已经多次说明的那样，不可能使用JUnit 4.

Anyway, I wouldn't recommend to make your testclasses dependent from some externally provided state. What if you want to run a single testclass?

无论如何，我不建议让您的测试类依赖于某些外部提供的状态。如果您想运行单个测试类怎么办？

I would recommend to make your separate test classes @Parameterizedand use a utility class to provide the parameters:

我建议制作单独的测试类@Parameterized并使用实用程序类来提供参数：

@RunWith(Suite.class)
@SuiteClasses({ Test1.class, Test2.class })
public class TestSuite {
    // suite
}

@RunWith(Parameterized.class}
public class Test1 {
    public Test1(Object param1) { /* ... */ }

    @Parameters
    public static Collection<Object[]> data() {
        return TestParameters.provideTestData()
    }

    @Test
    public void someTest() { /* ... */ }
}

@RunWith(Parameterized.class}
public class Test2 {
    public Test2(Object param1) { /* ... */ }

    @Parameters
    public static Collection<Object[]> data() {
        return TestParameters.provideTestData()
    }

    @Test
    public void someOtherTest() { /* ... */ }
}

class TestParameters {
    public static Collection<Object[]> provideTestData() {
        Collection<Object[]> data = new ...;
        // build testdata
    return data;
}

回答by allofmex

Maybe this answer helps: Parameterized unit test suites

也许这个答案有帮助：参数化单元测试套件

It uses @RunWith(Enclosed.class)and seems to solve the problem.

它使用@RunWith(Enclosed.class)并似乎解决了问题。