在ClassInitialize生成的数据驱动测试:在Visual Studio 2012中不再工作 [英] Data driven tests generated in ClassInitialize: no longer working in Visual Studio 2012
问题描述
我已经从Visual Studio 2010到Visual Studio 2012中升级。
在我的单元测试的项目,我有一个生成CSV文件中的[ClassInitialize]方法,我然后送入一个数据驱动的使用[数据源]连接到CSV [TestMethod的]。
这工作在Visual Studio 2010中大。
我不能得到这个在Visual Studio工作2012
看来,在VS2012的MS测试运行需要连接到[数据源文件]已经存在,否则没有任何的测试运行。如果我创建CSV自己的数据驱动测试运行,但他们不拿起[ClassInitialize]创建的数据:看来,从[数据源]测试列表之前[ClassInitialize]运行评估。 p>
有没有解决办法?
这是一个很小的项目,再现的问题。对我来说,这成功地VS2010,但VS2012失败。
TestProject.cs
使用System.Diagnostics程序;
:使用System.IO;
使用Microsoft.VisualStudio.TestTools.UnitTesting;
命名空间TestProject
{
[TestClass中]
公共类DataDrivenUnitTest
{
私人静态布尔_classInitializeCalled;
私有静态诠释_testCount;
公众的TestContext的TestContext {搞定;组; }
[ClassInitialize]
公共静态无效ClassInitialize(的TestContext的TestContext)
{
//生成测试
//的CSV名单的TestContext =的TestContext ;
_classInitializeCalled = TRUE;
串testDirectory;
testDirectory = testContext.DeploymentDirectory;
使用(VAR F =新的StreamWriter(testDirectory + @\+TestList.csv))
{
f.WriteLine(测试名);
f.WriteLine(种皮);
f.WriteLine(TESTB);
}
}
[TestMethod的]
[数据源(CsvTestData32)]
公共无效TestMethod1()
{
_testCount ++;
VAR测试名= TestContext.DataRow [测试名];
Debug.Print(测试{0}:{1},_testCount,测试名);
}
[ClassCleanup]
公共静态无效ClassCleanup()
{
Assert.IsTrue(_classInitializeCalled);
Assert.AreEqual(_testCount,2);
Debug.Print(完成测试:测试运行{0},_testCount);
}
}
}
在我的情况下运行测试为32位是默认设置; TEST> TestSettings>默认处理器架构
- 在VS2012 - 这可能下切换VS2010右键单击解决方案资源管理器解决方案项目'>添加>新项目>测试设置,然后,
- VS2010主菜单>测试>编辑测试设置>主机>运行测试,在32位或64位进程。
如果您使用64位,使用[数据源(CsvTestData64)],并且您可能需要安装 MS访问64位ODBC驱动程序。最简单的方法是坚持使用32位。
App.config中
<?XML版本=1.0编码=UTF-8>?;
<结构>
< configSections>
<节名称=microsoft.visualstudio.testtoolsTYPE =Microsoft.VisualStudio.TestTools.UnitTesting.TestConfigurationSection,Microsoft.VisualStudio.QualityTools.UnitTestFramework,版本= 10.0.0.0,文化=中性公钥= b03f5f7f11d50a3a />
< / configSections>
< microsoft.visualstudio.testtools>
<数据源>
<添加名称=CsvTestData32的connectionString =CsvConn32dataTableName =`TestList.csv`dataAccessMethod =顺序/>
<添加名称=CsvTestData64的connectionString =CsvConn64dataTableName =`TestTest.csv`dataAccessMethod =顺序/>
< /数据源>
< /microsoft.visualstudio.testtools>
<&是connectionStrings GT;
<添加名称=CsvConn32的connectionString =驱动程序= {Microsoft文本驱动程序(* .TXT; * .csv的)} ;. \;扩展= CSV;的providerName =System.Data.Odbc/>
<添加名称=CsvConn64的connectionString =驱动程序= {Microsoft Access中的文本驱动程序(*。txt文件,* .csv的)}; DBQ = .\;扩展= CSV的providerName =System.Data这。 ODBC/>
< /&是connectionStrings GT;
< /结构>
的 MSTestHacks 可能的帮助。
它允许 IEnumberable
在您的测试类被用作数据源
TestMethod的。
>
从网站:
运行数据源
您必须继承你的测试类从TestBase
[TestClass中]
公共类UnitTest1:TestBase
{}
创建属性,字段或方法,返回一个的IEnumerable
[TestClass中]
公共类UnitTest1:TestBase
{
私人的IEnumerable< INT>东西
{
得到
{
//这可以从任何地方做任何事情,获取的动态列表....
返回新的List< INT> {1,2,3};
}
}
}
添加数据源
属性为您的测试方法,指回的IEnumerable
名称前面创建。这需要完全合格的。
[TestMethod的]
[数据源(Namespace.UnitTest1.Stuff)]
公共无效TestMethod1()
{
变种数= this.TestContext.GetRuntimeDataSourceObject< INT>();
Assert.IsNotNull(数);
}
I have upgraded from Visual Studio 2010 to Visual Studio 2012.
In my unit test project, I have a [ClassInitialize] method which generates a CSV file which I then feed into a data-driven [TestMethod] using [DataSource] connected to the CSV.
This works great in Visual Studio 2010.
I cannot get this to work in Visual Studio 2012.
It seems that in VS2012 the MS test runner requires the file connected to the [DataSource] to already exist otherwise none of the tests will run. If I create the CSV myself, the data-driven tests run, but they do not pick up the data created in [ClassInitialize]: it seems that the list of tests from the [DataSource] is evaluated BEFORE [ClassInitialize] runs.
Is there a workaround?
This is a minimal project that reproduces the problem. For me, this succeeds in VS2010 but fails in VS2012.
TestProject.cs
using System.Diagnostics;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace TestProject
{
[TestClass]
public class DataDrivenUnitTest
{
private static bool _classInitializeCalled;
private static int _testCount;
public TestContext TestContext { get; set; }
[ClassInitialize]
public static void ClassInitialize(TestContext testContext)
{
// Generate the csv list of tests
//TestContext = testContext;
_classInitializeCalled = true;
string testDirectory;
testDirectory = testContext.DeploymentDirectory;
using (var f = new StreamWriter(testDirectory + @"\" + "TestList.csv"))
{
f.WriteLine("TestName");
f.WriteLine("TestA");
f.WriteLine("TestB");
}
}
[TestMethod]
[DataSource("CsvTestData32")]
public void TestMethod1()
{
_testCount++;
var testName = TestContext.DataRow["TestName"];
Debug.Print("Test {0}: {1}", _testCount, testName);
}
[ClassCleanup]
public static void ClassCleanup()
{
Assert.IsTrue(_classInitializeCalled);
Assert.AreEqual(_testCount, 2);
Debug.Print("Tests completed: Tests run {0}", _testCount);
}
}
}
In my case 'run test as 32-bit' is the default setting; this may be changed under -
- in VS2012: TEST > TestSettings > Default Processor Architecture
- in VS2010 Right-click Solution explorer 'Solution items' > Add > New Item > Test Settings, then,
- VS2010 main menu > Tests > Edit Test Settings > Hosts > Run tests in 32 bit or 64 bit process.
If you use 64-bit, use [DataSource("CsvTestData64")], and you may need to install the MS Access 64-bit ODBC driver. The easiest way is to stick with 32-bit.
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="microsoft.visualstudio.testtools" type="Microsoft.VisualStudio.TestTools.UnitTesting.TestConfigurationSection, Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</configSections>
<microsoft.visualstudio.testtools>
<dataSources>
<add name="CsvTestData32" connectionString="CsvConn32" dataTableName="`TestList.csv`" dataAccessMethod="Sequential" />
<add name="CsvTestData64" connectionString="CsvConn64" dataTableName="`TestTest.csv`" dataAccessMethod="Sequential" />
</dataSources>
</microsoft.visualstudio.testtools>
<connectionStrings>
<add name="CsvConn32" connectionString="Driver={Microsoft Text Driver (*.txt; *.csv)};.\;Extensions=csv;" providerName="System.Data.Odbc" />
<add name="CsvConn64" connectionString="Driver={Microsoft Access Text Driver (*.txt, *.csv)};Dbq=.\;Extensions=csv" providerName="System.Data.Odbc" />
</connectionStrings>
</configuration>
MSTestHacks might help.
It allows an IEnumberable
on your test class to be used as the DataSource
for your TestMethod
.
From the website:
Runtime DataSource
You MUST inherit your test class from TestBase
[TestClass]
public class UnitTest1 : TestBase
{ }
Create a Property, Field or Method, that returns an IEnumerable
[TestClass]
public class UnitTest1 : TestBase
{
private IEnumerable<int> Stuff
{
get
{
//This could do anything, fetch a dynamic list from anywhere....
return new List<int> { 1, 2, 3 };
}
}
}
Add the DataSource
attribute to your test method, pointing back to the IEnumerable
name created earlier. This needs to be fully qualified.
[TestMethod]
[DataSource("Namespace.UnitTest1.Stuff")]
public void TestMethod1()
{
var number = this.TestContext.GetRuntimeDataSourceObject<int>();
Assert.IsNotNull(number);
}
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