带参数的Nunit测试设置方法

Question

Can we have a test set up method with arguments? I need a different set up for every test in a fixture.

Do we have something (or similar way) as the hypothetical idea :

[SetUp]
[Argument("value-1")]
[Argument("value-2")]
[Argument("value-3")]
public void InitializeTest(string value)
{
    //set env var with value
}

Answer 1

It can be done using the TestFixture attribute with a parameter.

If all the tests in the class depend on the same parameter this is the way to go.

The class will need a constructor with the same parameter passed to the TestFixture attribute.

See Parameterized Test Fixtures on https://github.com/nunit/docs/wiki/TestFixture-Attribute

[TestFixture("Oscar")]
[TestFixture("Paul")]
[TestFixture("Peter")]
public class NameTest
{
    private string _name;

    public NameTest(string name)
    {
        _name = name;
    }

    [Test]
    public void Test_something_that_depends_on_name()
    {
        //Todo...
    }

    [Test]
    public void Test_something_that_also_depends_on_name()
    {
        //Todo...
    }
    //...
}

This code is from the nunit documentation website:

[TestFixture("hello", "hello", "goodbye")]
[TestFixture("zip", "zip")]
[TestFixture(42, 42, 99)]
public class ParameterizedTestFixture
{
    private readonly string eq1;
    private readonly string eq2;
    private readonly string neq;

    public ParameterizedTestFixture(string eq1, string eq2, string neq)
    {
        this.eq1 = eq1;
        this.eq2 = eq2;
        this.neq = neq;
    }

    public ParameterizedTestFixture(string eq1, string eq2)
        : this(eq1, eq2, null)
    {
    }

    public ParameterizedTestFixture(int eq1, int eq2, int neq)
    {
        this.eq1 = eq1.ToString();
        this.eq2 = eq2.ToString();
        this.neq = neq.ToString();
    }

    [Test]
    public void TestEquality()
    {
        Assert.AreEqual(eq1, eq2);
        if (eq1 != null && eq2 != null)
            Assert.AreEqual(eq1.GetHashCode(), eq2.GetHashCode());
    }

    [Test]
    public void TestInequality()
    {
        Assert.AreNotEqual(eq1, neq);
        if (eq1 != null && neq != null)
            Assert.AreNotEqual(eq1.GetHashCode(), neq.GetHashCode());
    }
}

Answer 2

Setup is executed once per each tests and for one tests there is only one SetUp and TearDown. You can call your Initialize method from tests explicitly and then create Data-Driven tests using TestCase attribute

public void InitializeTest(string value)
{
    //set env var with value
}

[TestCase("Value-1")]
[TestCase("Value-2")]
[TestCase("Value-3")]
public void Test(string value)
{
    InitializeTest(value);

    //Arange
    //Act
    //Assert
}

As result, you will have three tests each calling InitializeTest with different parameters

Answer 3

设置方法用于执行一些preTest作业，其中包括准备测试，例如设置运行测试所需的任何值，您可以在设置方法中设置这些值，而不必提供这些值作为参数。