Cannot inject @Test annotated Method [main] with [class [Ljava.lang.String;].

[ben-manes]

@Test(singleThreaded = true)
public class MainTest {

  @Test public void foo() {}

  public static void main(String[] args) {}
}

[Utils] [ERROR] [Error] org.testng.TestNGException: 
Cannot inject @Test annotated Method [main] with [class [Ljava.lang.String;].

While understandable, I'd argue that the class annotation shouldn't apply to static methods or, at least, to the main method. It is easy to work around by configuring each method, but was surprising.

[krmahadevan]

I think it's because of the fact that a class level @test annotation causes TestNG to start treating all public methods (both static and instance ones) as Test methods and so tries parameter injection (for parameterized methods ) which explains the error because default parameter injection doesn't know how to deal with a String array.

[ben-manes]

That was my analysis as well. I think either static methods or, at least the main method, shouldn't be opted into this. It was surprising but made sense when I thought about it.

[juherr]

True, a static main(String[]) could be excluded from detected test methods.

@cbeust WDYT?

[cbeust]

Sounds good to me. I often have to add @Test(enabled = false) to my main methods, which is a bit silly.

[ben-manes]

I'd be happy using that approach if added to the exception message. I was debugging with a main method, so not a very common occurrence.

[Pavithranandhini]

Cannot inject @test annotated Method [main] with [class [Ljava.lang.String;]

what is the solution for this issue

[krmahadevan]

@Pavithranandhini You haven't told us a lot of things.

1. What version of TestNG are you working with ? [ Please use latest released version of 7.1.0 ]
2. What does your code look like ?
3. How are you running your tests ?

All said and done, please check if this comment helps you fix it.

what is the solution for this issue

Upgrade to the latest version and this should be taken care of, because it was a bug that got fixed.

[umeshkarkar]

I am also facing the same issue. please help here.
please find attached screenshot:

[krmahadevan]

@umeshkarkar the exception clearly gives you a link that you can consider referring to understand how to get past the problem.

You have a test method that is accepting a string parameter but you have neither used a data provider nor used the @Parameter annotation.

TestNG is working fine.

[umeshkarkar]

Yeah, got it but again im getting nullpointerException at line no 23 after removing string parameter from the test case.

[krmahadevan]

@umeshkarkar - Please use the Google forums or stackoverflow to seek help on user issues for TestNG. WE would like to confine the issues page to tracking actual TestNG bugs or new features.

So I would suggest that you post on either of these two forums with a simple full fledged example that can be used to reproduce the problem and someone in the forum should be able to help you out.
Dont forget to use the latest released version of TestNG viz., 7.3.0

[umeshkarkar]

Sure. Thanks!!

[Daljeetkaur320]

Could anyone tell me how i cam resolve this issue

[juherr]

Your test method has parameters but doesn't use parameters. See the documentation: https://testng.org/#_parameters