JUNIT搭配easytest做数据驱动的单元测试

原文在https://www.javacodegeeks.com/2016/12/data-driven-testing-junit-easytest.html

摘要如下：
  JUNIT做数据驱动的测试比较麻烦，所谓数据驱动的测试，就是比如同样的一个方法，能用EXCEL,CSV等格式提供大量的不同测试数据给测试去验证，这里可以使用
easytest这个不错的开源工具，地址在：https://github.com/EaseTech/easytest

下面例子讲解：

1） 比如一个加法的：
  

public class Calculator {
    public Double add(Double a, Double b){
        return a+b;
    }
}

2） MAVEN引入EASYTEST
 

<dependency>
    <groupId>org.easetech</groupId>
    <artifactId>easytest-core</artifactId>
    <version>1.4.0</version>
</dependency>

3 然后可以编制CSV或者EXCEL，记得第1列是要测试的方法名，内容留空，
然后是每列的参数
  



4 CSV测试的：

  

@RunWith(DataDrivenTestRunner.class)
public class CSVLoaderExample extends DataDrivenTest {

    @Test    @DataLoader(filePaths = "calculator.csv", loaderType = LoaderType.CSV)
    public String testAddFromCSV(@Param(name = "a") Double a,
                                 @Param(name = "b") Double b,
                                 @Param(name = "expected") Double expected) {
        Assert.assertEquals(expected, calculator.add(a, b), 0.1);
        return "success";

    }
    @Test    @DataLoader(filePaths = "calculator2.csv")
    public void testAdd(@Param(name = "a") Double a, @Param(name = "b")Double b, @Param(name = "expected")Double expected){
        Assert.assertEquals(expected, calculator.add(a,b),0.1);
    }
}

  首先继承DataDrivenTest ，然后用注解 @DataLoader(filePaths = "calculator.csv", loaderType = LoaderType.CSV) 标识是用CSV,XML还是EXCEL
   然后@Param(name = "a")中的NAME就是对应EXCEL或CSV文件中的列的标题了

EXCEL也是一样：
  

@RunWith(DataDrivenTestRunner.class)
public class ExcelLoaderExample extends DataDrivenTest {
    @Test    @DataLoader(filePaths = "calculator.xls", loaderType = LoaderType.EXCEL)
    public void testAddFromExcel(@Param(name = "a") Double a, @Param(name = "b") Double b, @Param(name = "expected") Double expected) {
        Assert.assertEquals(expected, calculator.add(a, b), 0.1);
    }
    @Test    @DataLoader(filePaths = {"calculator2.xls"})
    public void testAdd(@Param(name = "a") Double a, @Param(name = "b")Double b, @Param(name = "expected")Double expected){
        Assert.assertEquals(expected, calculator.add(a,b),0.1);
    }

}

4 还有不错的报表功能，可以输出：
 

@RunWith(DataDrivenTestRunner.class)
@Report(outputLocation = "classpath:TestReports")
public class ClassPathExampleReport extends DataDrivenTest{

    @Test    @DataLoader(filePaths = "calculator.xls")
    public void testAddFromExcel(@Param(name = "a") Double a, @Param(name = "b") Double b, @Param(name = "expected") Double expected) {
        Assert.assertEquals(expected, calculator.add(a, b), 0.1);
    }
    @Test    @DataLoader(filePaths = "calculator2.xls")
    public void testAdd(@Param(name = "a") Double a, @Param(name = "b") Double b, @Param(name = "expected") Double expected) {

        Assert.assertEquals(expected, calculator.add(a, b), 0.1);
    }
}

  这样就在TARGET目录下有个目录是TestReports，