code: def test_triu(
      *, dtype_and_x, k, test_flags, backend_fw, fn_name, on_device
  ):
      input_dtype, x = dtype_and_x
  
      helpers.test_function(
          input_dtypes=input_dtype,
          test_flags=test_flags,
          on_device=on_device,
          backend_to_test=backend_fw,
          fn_name=fn_name,
          x=x[0],
          k=k,
      )
  
imports: from hypothesis import strategies, assume
  import numpy
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test, BackendHandler
  import ivy_tests.test_ivy.helpers.globals
  from ivy_tests.test_ivy.test_functional.test_core.test_dtype import astype_helper
label_desc: Use image node_id 27 for calling a global function with example usage: test_triu() without return types