Clean up TestPasses.test_remove_mixed_type_operators (pytorch#12155)

I want to add more tests here. First, clean up the existing coverage.

Author: swolchok

exir/tests/test_passes.py

@@ -127,85 +127,44 @@ def setUpClass(cls) -> None:
         register_additional_test_aten_ops()
 
     def test_remove_mixed_type_operators(self) -> None:
+        def count_nodes_with_target_asserting_arguments_have_dtype(
+            new_graph_module, target, arg_dtype
+        ):
+            count = 0
+            for node in new_graph_module.graph.nodes:
+                if node.op == "call_function" and node.target == target:
+                    count += 1
+                    for arg in node.args:
+                        self.assertEqual(arg.meta["val"].dtype, arg_dtype)
+            return count
+
         class Add(torch.nn.Module):
             def forward(self, x: torch.Tensor, y: torch.Tensor) -> torch.Tensor:
                 return (x + y) + x
 
-        add = Add()
-
-        int_tensor = torch.tensor([[1, 2, 3]])
-        float_tensor = torch.tensor([[1.0, 2.0, 3.0]])
-        edge_prog = to_edge(export(add, (int_tensor, float_tensor), strict=True))
-
-        new_prog = edge_prog.transform([RemoveMixedTypeOperators()])
-        new_graph_module = new_prog.exported_program().graph_module
-        self.assertIsNotNone(new_graph_module)
-
-        add_count = 0
-
-        for node in new_graph_module.graph.nodes:
-            if (
-                node.op == "call_function"
-                and node.target == exir_ops.edge.aten.add.Tensor
-            ):
-                add_count += 1
-                node_args = node.args
-                for arg in node_args:
-                    self.assertEqual(arg.meta["val"].dtype, torch.float)
-
-        self.assertEqual(add_count, 2)
-
-        double_tensor = torch.tensor([[1.0, 2.0, 3.0]])
-        double_tensor = double_tensor.to(torch.double)
-
-        double_prog = to_edge(export(add, (int_tensor, double_tensor), strict=True))
-
-        double_prog.transform([RemoveMixedTypeOperators()])
-        new_graph_module_double = double_prog.exported_program().graph_module
-        self.assertIsNotNone(new_graph_module_double)
-
-        add_count_double = 0
-
-        for node in new_graph_module_double.graph.nodes:
-            if (
-                node.op == "call_function"
-                and node.target == exir_ops.edge.aten.add.Tensor
-            ):
-                add_count_double += 1
-                node_args = node.args
-                for arg in node_args:
-                    self.assertEqual(arg.meta["val"].dtype, torch.double)
-
-        self.assertEqual(add_count_double, 2)
-
         class Mult(torch.nn.Module):
             def forward(self, x: torch.Tensor, y: torch.Tensor) -> torch.Tensor:
                 return x * y
 
-        mult = Mult()
-
-        float_tensor_vert = float_tensor.T
-        mult_prog = to_edge(export(mult, (int_tensor, float_tensor_vert), strict=True))
-
-        # graph_module_mult.graph.print_tabular()
-
-        mult_prog = mult_prog.transform([RemoveMixedTypeOperators()])
-        new_graph_module_mult = mult_prog.exported_program().graph_module
-        self.assertIsNotNone(new_graph_module_mult)
+        for module, op, expected_count in (
+            (Add, exir_ops.edge.aten.add.Tensor, 2),
+            (Mult, exir_ops.edge.aten.mul.Tensor, 1),
+        ):
+            for second_arg_dtype in (torch.int64, torch.float, torch.double):
+                int_tensor = torch.tensor([[1, 2, 3]], dtype=torch.int64)
+                float_tensor = torch.tensor([[1.0, 2.0, 3.0]], dtype=second_arg_dtype)
+                edge_prog = to_edge(
+                    export(module(), (int_tensor, float_tensor), strict=True)
+                )
 
-        mult_count = 0
+                new_prog = edge_prog.transform([RemoveMixedTypeOperators()])
+                new_graph_module = new_prog.exported_program().graph_module
+                self.assertIsNotNone(new_graph_module)
 
-        for node in new_graph_module_mult.graph.nodes:
-            if (
-                node.op == "call_function"
-                and node.target == exir_ops.edge.aten.mul.Tensor
-            ):
-                mult_count += 1
-                node_args = node.args
-                for arg in node_args:
-                    self.assertEqual(arg.meta["val"].dtype, torch.float)
-
-        self.assertEqual(mult_count, 1)
+                count = count_nodes_with_target_asserting_arguments_have_dtype(
+                    new_graph_module, op, second_arg_dtype
+                )
+                self.assertEqual(count, expected_count)
 
     def test_remove_noop_pass(self) -> None:
         class Foo(torch.nn.Module):