testClasses 
  fun <T : KoTestClassProvider> List<T>.testClasses(    testPropertyName: String = "sut",     moduleName: String? = null,     sourceSetName: String? = null): List<KoBaseDeclaration>
List containing test classes.
Return
A list containing all test classes.
Parameters
testPropertyName  
the test property name to check. By default, "sut".
moduleName 
the name of the module to check (optional).
sourceSetName  
the name of the source set to check (optional).
fun <T : KoTestClassProvider> List<T>.testClasses(    moduleName: String? = null,     sourceSetName: String? = null,     predicate: (KoClassDeclaration) -> Boolean): List<KoBaseDeclaration>
List containing test classes matching the predicate.
Return
A list containing all test classes matching the predicate.
Parameters
moduleName 
the name of the module to check (optional).
sourceSetName  
the name of the source set to check (optional).
predicate
A function that defines the condition to be met by a test class.