getResource in Test BeforeClass in Gradle

I have the following code:

public class MyClass {
  private static URL url;
  @BeforeClass
  public static void init() throws Exception {
    url = MyClass.class.getResource("myjs.js");
  }

  @Test
  public void someTest() {
    // test code here using url
  }
}

The package for my class is com.mypackage

File myjs.js is also there at the same place alongside MyClass.

The test runs fine in Eclipse as a JUnit.

But when I try to execute the same using gradle:

./gradlew :MyModule:test --tests 'MyClass*'

It fails with url being null.

Why gradle is not being able to read resource myjs.js correctly?

The build folder has test_classes where if I go to com.mypackage, I can see both MyClass.class file and myjs.js file.

What am I missing?