Question

我想为Groovy中抛出IOException的方法编写测试。我在测试中模拟这个的唯一方法是强制该方法抛出此异常这就是原始代码的样子：

    public void cleanUpBermudaFiles(RequestMessage requestMessage)

    {
    final File sourceDirectory = new  File(preferenceService.getPreference("bermuda.landingstrip") + File.separator + requestMessage.getWorkflowId().getValue());

    if(sourceDirectory!=null && sourceDirectory.exists())
    {
         deleteDirectory(sourceDirectory);
    }
    else
    {
        LOG.error("Directory must exist in order to delete");
    }

}

private void deleteDirectory(File directoryToDelete)
{
    try {
        FileUtils.deleteDirectory(directoryToDelete);
    } catch (Exception e) {
        LOG.error("Failed to delete Bermuda files directory located at:" + directoryToDelete.getPath() + "with an exception" + e.getMessage());
    }
}

MY TEST :(我正在寻找一种让deleteDirectory抛出IOException的方法）

     public void testCleanUpBermudaFailure()
    {
    workflowId = new WorkflowId("123456")
    workflowDirectory = new File(srcDirectory, workflowId.value)
    workflowDirectory.mkdir()
    File.createTempFile('foo','.lst', workflowDirectory)
    def exception = {throw new IOException()}

    expect(mockRequestMessage.getWorkflowId()).andReturn(workflowId)
    expect(mockPreferenceService.getPreference("bermuda.landingstrip")).andReturn(srcDirectory.path)
    replay(mockPreferenceService, mockRequestMessage)
    fileCleanUpService.preferenceService = mockPreferenceService
    fileCleanUpService.metaClass.deleteDirectory = exception
    fileCleanUpService.cleanUpBermudaFiles(mockRequestMessage)
    verify(mockPreferenceService, mockRequestMessage)
    assert srcDirectory.listFiles().length == 0, 'CleanUp failed'

}

Answer 1

如果服务类是Groovy类，您可能希望模拟FileUtils，如：

FileUtils.metaClass.static.deleteDirectory = { File f -> throw new IOException() }

但是，正如ataylor指出的那样，如果它是Java类，则无法拦截调用。你可以找到一篇关于它的好文章here。

Answer 2

您正在模仿对deleteDirectory的无法调用，但真实的deleteDirectory会使用File类型的一个参数。试试这个：

def exception = { File directoryToDelete -> throw new IOException() }
...
fileCleanUpService.metaClass.deleteDirectory = exception

如何强制Groovy中的方法抛出异常

2 个答案: