Add test.

Author: ysiraichi

test/test_operations.py

@@ -2384,6 +2384,16 @@ def test_cummax_0_sized_dimension(self):
 
     self.assertEqual(actual, expected)
 
+  def test_conj_no_fallback(self):
+    met.clear_all()
+
+    tensor = torch.tensor([1 + 2j])
+    expected = torch.conj(tensor)
+    actual = torch.conj(tensor.to(xm.xla_device()))
+
+    self.assertEqual(actual, expected)
+    self.assertEqual(len(met.executed_fallback_ops()), 0)
+
 
 class MNISTComparator(nn.Module):