run method and store it one variable before each test in Nunit - nunit

Question

I need to run a method before each test Like how before method works in TestNg.
What I am expecting is I need to take the Testname and find the relevant test data and store it variable. Currently I have included that step in Test. But it would be good to have to reduce a line of code in each test.
is it possible in Nunit?

Answer 1

Setup attribute is used to provide a common set of functions that are performed just before each test method is called. You can also get the Method name from TestContext.CurrentContext.Test.MethodName. There are also other properties on Test like Arguments or FullName depending on what you need.
[SetUp]
public void Setup()
{
var testName = TestContext.CurrentContext.Test.MethodName;
TestContext.WriteLine($"SetUp for {testName}");
}
Alternately, you can also use TestCaseData class which provides extended test case information for a parameterized test.
public class DemoClass {
[TestCaseSource(typeof(MyDataClass), nameof(MyDataClass.DivideTestCases))]
public int DivideTest(int n, int d)
{
return n / d;
}
[TestCaseSource(typeof(MyDataClass), nameof(MyDataClass.AddTestCases))]
public int AddTest(int a, int b)
{
return a + b;
}
}
public class MyDataClass
{
public static IEnumerable DivideTestCases
{
get
{
yield return new TestCaseData(12, 3).Returns(4);
yield return new TestCaseData(12, 2).Returns(6);
yield return new TestCaseData(12, 4).Returns(3);
}
}
public static IEnumerable AddTestCases
{
get
{
yield return new TestCaseData(10, 15).Returns(25);
yield return new TestCaseData(12, 10).Returns(22);
yield return new TestCaseData(14, 5).Returns(19);
}
}
}