message: Add a unary ops cosine test to the standard tests
diff: @@ -122,6 +122,15 @@ class UnaryOpsTest(XLATestCase):
  np.array([[-1.7, 1.2]], dtype=dtype),
  expected=np.array([[-1, 2]], dtype=dtype))
  + self._assertOpOutputMatchesExpected(
  + math_ops.cos,
  + np.array(
  + [0.1, 0.2, 0.3, 0.4],
  + dtype=dtype),
  + expected=np.array(
  + [0.995004, 0.980067, 0.955337, 0.921061],
  + dtype=dtype))
  +
  self._assertOpOutputMatchesExpected(
  math_ops.exp,
  np.array([[-1, 1]], dtype=dtype),
  