如何做if的junit测试else分支答案

【问题标题】：how to do junit test else branch of if如何做if的junit测试else分支
【发布时间】：2016-01-14 14:38:53
【问题描述】：

我正在尝试对该方法进行 Junit 测试。

  public List<QuestionBank> getQuestionBankDetails(){
            if(stubbed){
                return (List<QuestionBank>) BeanPopulateUtils.getPopulateBeanValues(new QuestionBank(), true);
            }else{
                throw new NotImplementedException("Non-stubbed SOAP call not implemented");
            }
        }

这是我的 Junit 案例：

@Test
    public void testGetQuestionBankDetails(){
        List<QuestionBank> questionBankList = questionBankFacade.getQuestionBankDetails();
        int i=1;
         for(QuestionBank questionBank : questionBankList){
             assertEquals("Name "+i+"", questionBank.getName());
             assertEquals("Description "+i+"", questionBank.getDescription());
             assertEquals("Pubished Status "+i+" ", questionBank.getPubishedStatus());
             assertEquals("Questions "+i+"", questionBank.getQuestions());
             i++;
         }
    }

Junit 测试案例正在取得成功，但我想问的是我将如何在“其他”案例中进行测试

Throw new NotImplementedException("Non-stubbed SOAP call not implemented");

【问题讨论】：

标签： java junit junit4 junit3

【解决方案1】：

如果可能，尝试使用接口来区分存根实现和默认实现。并且最好使用配置逻辑来“注入”正确的行为，或者使用工厂来生成请求的类实例。

看这样的例子：

BankDetails.class

package example;

import java.util.List;

public interface BankDetails {
    List<QuestionBank> getQuestionBankDetails();
}

BankDetailsDefaultImpl.class

package example;

import java.util.List;

public class BankDetailsDefaultImpl implements BankDetails {

    @Override
    public List<QuestionBank> getQuestionBankDetails() {
        return (List<QuestionBank>) BeanPopulateUtils.getPopulateBeanValues(new QuestionBank(), true);
    }

}

BankDetailsStubbedImpl.class

package example;

import java.util.List;

public class BankDetailsStubbedImpl implements BankDetails {

    @Override
    public List<QuestionBank> getQuestionBankDetails() {
        throw new NotImplementedException("Non-stubbed SOAP call not implemented");
    }

}

QuestionBankFacade.class

package example;

public class QuestionBankFacade {

    private final BankDetails bankDetails;

    public QuestionBankFacade(final BankDetails bankDetails) {
        this.bankDetails = bankDetails;
    }

    public BankDetails getQuestionBankDetails() {
        return this.getQuestionBankDetails();
    }

}

最后是 JUnit 测试：

QuestionBankFacadeTest.class

package example;

import static org.junit.Assert.*;

import java.util.List;

import org.apache.commons.lang.NotImplementedException;
import org.junit.Test;

public class QuestionBankFacadeTest {

    @Test
    public void testDefaultImplementation() {
        final QuestionBankFacade questionBankFacade = new QuestionBankFacade(new BankDetailsDefaultImpl());
        List<QuestionBank> questionBankList = questionBankFacade.getQuestionBankDetails();
        //Test case that you already have
//       for(QuestionBank questionBank : questionBankList){
//             assertEquals("Name "+i+"", questionBank.getName());
//             assertEquals("Description "+i+"", questionBank.getDescription());
//             assertEquals("Pubished Status "+i+" ", questionBank.getPubishedStatus());
//             assertEquals("Questions "+i+"", questionBank.getQuestions());
//             i++;
//         }
    }

    @Test(expected = NotImplementedException.class)
    public void testStubbedImplementation() {
        final QuestionBankFacade questionBankFacade = new QuestionBankFacade(new BankDetailsStubbedImpl());
        questionBankFacade.getQuestionBankDetails();
    }

}

【讨论】：

【解决方案2】：

如果stubbed 是类变量，则创建一个对象并将该变量设置为false。然后调用函数getQuestionBankDetails();。这样你就可以检查 else 部分了

【讨论】：

【解决方案3】：

由于缺少代码，我假设您的 QuestionBankFacade 类如下所示：

private boolean stubbed;

public boolean isStubbed() {
    return stubbed;
}

public void setIsStubbed(boolean isStubbed) {
    this.stubbed = isStubbed;
}

public List<QuestionBank> getQuestionBankDetails() {
    if (stubbed) {
        return (List<QuestionBank>) BeanPopulateUtils.getPopulateBeanValues(new QuestionBank(), true);
    }
    throw new NotImplementedException("Non-stubbed SOAP call not implemented");
}

你可以写一个这样的测试：

@Test(expected=NotImplementedException.class)
public void getQuestionBankDetailsThrowsAnExceptionIfStubbed() {
    boolean memento = questionBankFacade.isStubbed();
    questionBankFacade.setIsStubbed(false);
    try {
        questionBankFacade.getQuestionBankDetails();
    } finally {
        questionBankFacade.setIsStubbed(memento);
    }
}

【讨论】：

【解决方案4】：

您需要编写一个单独的测试方法来测试 else 条件代码路径。

【讨论】：