C# visual-studio-2010 mstest data-driven-tests

有没有办法使用内存中已有的数据来驱动单元测试？

发布于 2024-12-14 19:06:33 字数 633 浏览 0 评论 0原文

我知道我可以使用文件中的数据来驱动单元测试，例如 csv 或 xml 文件中的数据。

例如：

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.CSV", 
    "Data.csv", 
    "Data#csv", 
    DataAccessMethod.Sequential)]
public void TestData() {}

我想知道是否有一种方法可以使用内存中已有的数据结构来驱动测试，而不是使用文件。

像这样的东西：

// this structure has the data to use in the unit test
var DataList = new List<string>();

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.IEnumerable",
    "DataList", 
    "DataList", 
    DataAccessMethod.Sequential)]
public void TestData() {}

原文

I know I can use data in files to drive unit test, for example data inside a csv or xml file.

For example:

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.CSV", 
    "Data.csv", 
    "Data#csv", 
    DataAccessMethod.Sequential)]
public void TestData() {}

I would like to know if there is a way that, instead of using a file, I can use a data structure that's already in memory to drive the tests.

Something like:

// this structure has the data to use in the unit test
var DataList = new List<string>();

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.IEnumerable",
    "DataList", 
    "DataList", 
    DataAccessMethod.Sequential)]
public void TestData() {}

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清醇 2024-12-21 19:06:33

如果它在内存中，我的偏好是不使用 DataSource，而是使用 T4 模板自动生成单元测试。这样，您只需编写一次测试，但在测试运行的结果中，您将看到您测试的每个输入的条目。将此 .tt 文件添加到您的测试项目中。

<#@ template debug="false" hostspecific="true" language="C#v3.5" #>
<#@ assembly name="System.Core.dll" #>
<#@ assembly name="System.Data.dll" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Linq" #>
<#@ output extension=".cs" #>
<#
        List<string> DataList = AccessInMemoryData();
#>
using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
[TestClass]
public class UnitTest1
{
    <# foreach (string currentTestString in DataList) { #>
    [TestMethod]
    public void TestingString_<#= currentTestString #>
    {
    string currentTestString = "<#= currentTestString #>";
    // TODO: Put your standard test code here which will use the string you created above
    }
    <# } #>
}
}

If it's in memory, my preference would be to not use DataSource, but use a T4 template to auto generate your unit tests instead. This way, you will only write the test once, but in the results for the test run, you will see an entry for each of the input you tested. Add this .tt file to your test project.

<#@ template debug="false" hostspecific="true" language="C#v3.5" #>
<#@ assembly name="System.Core.dll" #>
<#@ assembly name="System.Data.dll" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Linq" #>
<#@ output extension=".cs" #>
<#
        List<string> DataList = AccessInMemoryData();
#>
using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
[TestClass]
public class UnitTest1
{
    <# foreach (string currentTestString in DataList) { #>
    [TestMethod]
    public void TestingString_<#= currentTestString #>
    {
    string currentTestString = "<#= currentTestString #>";
    // TODO: Put your standard test code here which will use the string you created above
    }
    <# } #>
}
}

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も星光 2024-12-21 19:06:33

一个简单的解决方案可以是这样......

private void TestData(IEnumerable what ) { ... your test method ... }

[TestMethod]
public void TestDataInMemory() { List<T> mylist = ...; this.TestData(mylist); }

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.CSV", 
    "Data.csv", 
    "Data#csv", 
    DataAccessMethod.Sequential)]
public void TestData() { this.TestData(testContextInstance ...) }

通过这种方式，您可以使用测试方法来处理从文件加载的数据和从内存加载的数据。

A simple solution can be this...

private void TestData(IEnumerable what ) { ... your test method ... }

[TestMethod]
public void TestDataInMemory() { List<T> mylist = ...; this.TestData(mylist); }

[TestMethod]
[DataSource(
    "Microsoft.VisualStudio.TestTools.DataSource.CSV", 
    "Data.csv", 
    "Data#csv", 
    DataAccessMethod.Sequential)]
public void TestData() { this.TestData(testContextInstance ...) }

In this way you can use your test method both with data loaded from file and with data loaded from memory.

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