class_docstr: Test AssertFunction layer.
class_docstr_tok: ["Test","AssertFunction","layer","."]
code: def test_simple_pass(self):
      layer = tl.AssertFunction("abc->abc", tl.Dropout(rate=0.1))
      x = np.ones((2, 5, 20))
      layer(x)
  
imports: from absl.testing import absltest
  import numpy
  import trax.layers
label_desc: Use image node_id 1 for calling the AssertFunctionTest obj's underlying member method code with example usage: obj.test_simple_pass() without return types