MS 单元测试中出现异常？

发布于 2024-10-16 06:06:13 字数 989 浏览 1 评论 0原文

我为我的项目的方法创建了一个单元测试。当找不到文件时，该方法会引发异常。我为此编写了一个单元测试，但是当引发异常时我仍然无法通过测试。

方法是

public string[] GetBuildMachineNames(string path)
{
    string[] machineNames = null;

    XDocument doc = XDocument.Load(path);

    foreach (XElement child in doc.Root.Elements("buildMachines"))
    {
        int i = 0;
        XAttribute attribute = child.Attribute("machine");
        machineNames[i] = attribute.Value;
    }
    return machineNames;
}

单元测试

[TestMethod]
[DeploymentItem("TestData\\BuildMachineNoNames.xml")]
[ExpectedException(typeof(FileNotFoundException),"Raise exception when file not found")]
public void VerifyBuildMachineNamesIfFileNotPresent()
{
    var configReaderNoFile = new ConfigReader();
    var names = configReaderNoFile.GetBuildMachineNames("BuildMachineNoNames.xml");
}

我应该处理方法中的异常还是我遗漏了其他东西？

编辑：

我传递的路径不是找到该文件的路径，因此该测试应该通过...即，如果该路径中不存在文件怎么办。

原文

I created a unit test for a method of my project. That method raises an exception when a file is not found. I wrote a unit test for that, but I'm still not able to pass the test when the exception is raised.

Method is

public string[] GetBuildMachineNames(string path)
{
    string[] machineNames = null;

    XDocument doc = XDocument.Load(path);

    foreach (XElement child in doc.Root.Elements("buildMachines"))
    {
        int i = 0;
        XAttribute attribute = child.Attribute("machine");
        machineNames[i] = attribute.Value;
    }
    return machineNames;
}

Unit Test

[TestMethod]
[DeploymentItem("TestData\\BuildMachineNoNames.xml")]
[ExpectedException(typeof(FileNotFoundException),"Raise exception when file not found")]
public void VerifyBuildMachineNamesIfFileNotPresent()
{
    var configReaderNoFile = new ConfigReader();
    var names = configReaderNoFile.GetBuildMachineNames("BuildMachineNoNames.xml");
}

Should I handle the Exception in the method or am I missing something else??

EDIT:

The path I am passing is not the one to find the file, so this test should pass... i.e. what if file not exists in that path.

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和影子一齐双人舞 2024-10-23 06:06:13

在您的单元测试中，您似乎正在部署一个 xml 文件：TestData\BuildMachineNoNames.xml，并将其传递给 GetBuildMachineNames。因此该文件存在，并且您不能期望抛出 FileNotFoundException 。所以也许像这样：

[TestMethod]
[ExpectedException(typeof(FileNotFoundException), "Raise exception when file not found")]
public void VerifyBuildMachineNamesIfFileNotPresent()
{
    var configReaderNoFile = new ConfigReader();
    var names = configReaderNoFile.GetBuildMachineNames("unexistent.xml");
}

In your unit test it seems that you are deploying an xml file: TestData\BuildMachineNoNames.xml which you are passing to the GetBuildMachineNames. So the file exists and you cannot expect a FileNotFoundException to be thrown. So maybe like this:

[TestMethod]
[ExpectedException(typeof(FileNotFoundException), "Raise exception when file not found")]
public void VerifyBuildMachineNamesIfFileNotPresent()
{
    var configReaderNoFile = new ConfigReader();
    var names = configReaderNoFile.GetBuildMachineNames("unexistent.xml");
}

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幸福丶如此 2024-10-23 06:06:13

通过放置 [ExpectedException(typeof(FileNotFoundException),"Raise exception when file not find")] 属性，您期望该方法将抛出 FileNotFoundException，如果未抛出 FileNotFoundException 测试将失败。否则测试就会成功。

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