Junit测试套件及参数化设置

本文介绍如何使用JUnit创建测试套件以批量执行多个测试类,并演示了如何通过参数化测试来验证不同输入下的预期结果。

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一、测试套件

测试套件是用来批量测试类的,即使用@RunWith(Suite.class)将一个类修饰成测试套件类,该类中不能含有任何内容。

首先新建3个测试类,代码如下:

public class Test1 { //第一个测试类
    @Test
    public void test() {
        System.out.println("test1");
    }
}

public class Test2 {  //第二个测试类
    @Test
    public void test() {
        System.out.println("test2");
    }
}

public class Test3 {  //第三个测试类
    @Test
    public void test() {
        System.out.println("test3");
    }
}

然后建立一个测试套件的入口类,不包含任何方法,更改测试运行器Suite.class,将要被测试的类作为数组传入到SuiteClasses,代码如下:

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

@RunWith(Suite.class)
@Suite.SuiteClasses({Test1.class,Test2.class,Test3.class})
public class SuiteTest {
    //不能包含任何内容
}

二、参数化设置

步骤一:新建一个测试类,使用@RunWith(Parameterized.class)声明为参数设置类

步骤二:在类中定义用来存放预期值和输入参数的变量,并构造方法

步骤三:测试多组数据就需要用数组进行返回,所以可以定义一个Collection类型的静态方法,需要使用@parameters注解

步骤四:写一个测试方法

代码如下:

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

@RunWith(Parameterized.class)
public class ParameterTest {
    int expected = 0;
    int input1 = 0;
    int input2 = 0;

    public ParameterTest(int expected,int input1,int input2){
        this.expected = expected;
        this.input1 = input1;
        this.input2 = input2;
    }

    @Parameters
    public static Collection<Object[]> t(){
        return Arrays.asList(new Object[][]{
                {3,1,2},{5,2,3}
        });
    }

    @Test
    public void testAdd(){
        assertEquals(expected,new Number().add(input1, input2));
    }
}
Files contained in junit4-4.8.2.jar: LICENSE.txt META-INF/MANIFEST.MF junit.extensions.ActiveTestSuite.class junit.extensions.RepeatedTest.class junit.extensions.TestDecorator.class junit.extensions.TestSetup.class junit.extensions.package-info.class junit.framework.Assert.class junit.framework.AssertionFailedError.class junit.framework.ComparisonCompactor.class junit.framework.ComparisonFailure.class junit.framework.JUnit4TestAdapter.class junit.framework.JUnit4TestAdapterCache.class junit.framework.JUnit4TestCaseFacade.class junit.framework.Protectable.class junit.framework.Test.class junit.framework.TestCase.class junit.framework.TestFailure.class junit.framework.TestListener.class junit.framework.TestResult.class junit.framework.TestSuite.class junit.framework.package-info.class junit.runner.BaseTestRunner.class junit.runner.TestRunListener.class junit.runner.Version.class junit.runner.package-info.class junit.textui.ResultPrinter.class junit.textui.TestRunner.class junit.textui.package-info.class org.hamcrest.BaseDescription.class org.hamcrest.BaseMatcher.class org.hamcrest.CoreMatchers.class org.hamcrest.Description.class org.hamcrest.Factory.class org.hamcrest.Matcher.class org.hamcrest.SelfDescribing.class org.hamcrest.StringDescription.class org.hamcrest.core.AllOf.class org.hamcrest.core.AnyOf.class org.hamcrest.core.DescribedAs.class org.hamcrest.core.Is.class org.hamcrest.core.IsAnything.class org.hamcrest.core.IsEqual.class org.hamcrest.core.IsInstanceOf.class org.hamcrest.core.IsNot.class org.hamcrest.core.IsNull.class org.hamcrest.core.IsSame.class org.hamcrest.internal.ArrayIterator.class org.hamcrest.internal.SelfDescribingValue.class org.hamcrest.internal.SelfDescribingValueIterator.class org.junit.After.class org.junit.AfterClass.class org.junit.Assert.class org.junit.Assume.class org.junit.Before.class org.junit.BeforeClass.class org.junit.ComparisonFailure.class org.junit.Ignore.class org.junit.Rule.class org.junit.Test.class org.junit.experimental.ParallelComputer.class org.junit.experimental.categories.Categories.class org.junit.experimental.categories.Category.class org.junit.experimental.max.CouldNotReadCoreException.class org.junit.experimental.max.MaxCore.class org.junit.experimental.max.MaxHistory.class org.junit.experimental.results.FailureList.class org.junit.experimental.results.PrintableResult.class org.junit.experimental.results.ResultMatchers.class org.junit.experimental.runners.Enclosed.class org.junit.experimental.theories.DataPoint.class org.junit.experimental.theories.DataPoints.class org.junit.experimental.theories.ParameterSignature.class org.junit.experimental.theories.ParameterSupplier.class org.junit.experimental.theories.ParametersSuppliedBy.class org.junit.experimental.theories.PotentialAssignment.class org.junit.experimental.theories.Theories.class org.junit.experimental.theories.Theory.class org.junit.experimental.theories.internal.AllMembersSupplier.class org.junit.experimental.theories.internal.Assignments.class org.junit.experimental.theories.internal.ParameterizedAssertionError.class org.junit.experimental.theories.suppliers.TestedOn.class org.junit.experimental.theories.suppliers.TestedOnSupplier.class org.junit.internal.ArrayComparisonFailure.class org.junit.internal.AssumptionViolatedException.class org.junit.internal.ComparisonCriteria.class org.junit.internal.ExactComparisonCriteria.class org.junit.internal.InexactComparisonCriteria.class org.junit.internal.JUnitSystem.class org.junit.internal.RealSystem.class org.junit.internal.TextListener.class org.junit.internal.builders.AllDefaultPossibilitiesBuilder.class org.junit.internal.builders.AnnotatedBuilder.class org.junit.internal.builders.IgnoredBuilder.class org.junit.internal.builders.IgnoredClassRunner.class org.junit.internal.builders.JUnit3Builder.class org.junit.internal.builders.JUnit4Builder.class org.junit.internal.builders.NullBuilder.class org.junit.internal.builders.SuiteMethodBuilder.class org.junit.internal.matchers.CombinableMatcher.class org.junit.internal.matchers.Each.class org.junit.internal.matchers.IsCollectionContaining.class org.junit.internal.matchers.StringContains.class org.junit.internal.matchers.SubstringMatcher.class org.junit.internal.matchers.TypeSafeMatcher.class org.junit.internal.requests.ClassRequest.class org.junit.internal.requests.FilterRequest.class org.junit.internal.requests.SortingRequest.class org.junit.internal.requests.package-info.class org.junit.internal.runners.ClassRoadie.class org.junit.internal.runners.ErrorReportingRunner.class org.junit.internal.runners.FailedBefore.class org.junit.internal.runners.InitializationError.class org.junit.internal.runners.JUnit38ClassRunner.class org.junit.internal.runners.JUnit4ClassRunner.class org.junit.internal.runners.MethodRoadie.class org.junit.internal.runners.MethodValidator.class org.junit.internal.runners.SuiteMethod.class org.junit.internal.runners.TestClass.class org.junit.internal.runners.TestMethod.class org.junit.internal.runners.model.EachTestNotifier.class org.junit.internal.runners.model.MultipleFailureException.class org.junit.internal.runners.model.ReflectiveCallable.class org.junit.internal.runners.package-info.class org.junit.internal.runners.statements.ExpectException.class org.junit.internal.runners.statements.Fail.class org.junit.internal.runners.statements.FailOnTimeout.class org.junit.internal.runners.statements.InvokeMethod.class org.junit.internal.runners.statements.RunAfters.class org.junit.internal.runners.statements.RunBefores.class org.junit.matchers.JUnitMatchers.class org.junit.matchers.package-info.class org.junit.package-info.class org.junit.rules.ErrorCollector.class org.junit.rules.ExpectedException.class org.junit.rules.ExternalResource.class org.junit.rules.MethodRule.class org.junit.rules.TemporaryFolder.class org.junit.rules.TestName.class org.junit.rules.TestWatchman.class org.junit.rules.Timeout.class org.junit.rules.Verifier.class org.junit.runner.Computer.class org.junit.runner.Describable.class org.junit.runner.Description.class org.junit.runner.JUnitCore.class org.junit.runner.Request.class org.junit.runner.Result.class org.junit.runner.RunWith.class org.junit.runner.Runner.class org.junit.runner.manipulation.Filter.class org.junit.runner.manipulation.Filterable.class org.junit.runner.manipulation.NoTestsRemainException.class org.junit.runner.manipulation.Sortable.class org.junit.runner.manipulation.Sorter.class org.junit.runner.manipulation.package-info.class org.junit.runner.notification.Failure.class org.junit.runner.notification.RunListener.class org.junit.runner.notification.RunNotifier.class org.junit.runner.notification.StoppedByUserException.class org.junit.runner.notification.package-info.class org.junit.runner.package-info.class org.junit.runners.AllTests.class org.junit.runners.BlockJUnit4ClassRunner.class org.junit.runners.JUnit4.class org.junit.runners.Parameterized.class org.junit.runners.ParentRunner.class org.junit.runners.Suite.class org.junit.runners.model.FrameworkField.class org.junit.runners.model.FrameworkMember.class org.junit.runners.model.FrameworkMethod.class org.junit.runners.model.InitializationError.class org.junit.runners.model.RunnerBuilder.class org.junit.runners.model.RunnerScheduler.class org.junit.runners.model.Statement.class org.junit.runners.model.TestClass.class org.junit.runners.package-info.class org/hamcrest/core/package.html org/hamcrest/package.html
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