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How to use test_self method in avocado

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type_inference_test.py
Source:type_inference_test.py
1# Copyright 2020 The TensorFlow Authors. All Rights Reserved.2#3# Licensed under the Apache License, Version 2.0 (the "License");4# you may not use this file except in compliance with the License.5# You may obtain a copy of the License at6#7#     http://www.apache.org/licenses/LICENSE-2.08#9# Unless required by applicable law or agreed to in writing, software10# distributed under the License is distributed on an "AS IS" BASIS,11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12# See the License for the specific language governing permissions and13# limitations under the License.14# ==============================================================================15"""Tests for type_inference module."""16from typing import Any, Callable, List17from tensorflow.python.autograph.pyct import anno18from tensorflow.python.autograph.pyct import cfg19from tensorflow.python.autograph.pyct import qual_names20from tensorflow.python.autograph.pyct import transpiler21from tensorflow.python.autograph.pyct.static_analysis import activity22from tensorflow.python.autograph.pyct.static_analysis import reaching_definitions23from tensorflow.python.autograph.pyct.static_analysis import reaching_fndefs24from tensorflow.python.autograph.pyct.static_analysis import type_inference25from tensorflow.python.platform import test26class BasicTestResolver(type_inference.Resolver):27  """A very basic resolver for testing."""28  def res_name(self, ns, types_ns, name):29    str_name = str(name)30    if str_name == 'int':31      return {int}, int32    return {type(ns[str_name])}, ns[str_name]33  def res_value(self, ns, value):34    return {type(value)}35  def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):36    if type_anno is None:37      return None38    return {str(type_anno)}39class TestTranspiler(transpiler.GenericTranspiler):40  def __init__(self, resolver_type):41    super().__init__()42    self.resolver = resolver_type()43  def get_transformed_name(self, _):44    return 'test_item'45  def transform_ast(self, node, ctx):46    node = qual_names.resolve(node)47    node = activity.resolve(node, ctx)48    graphs = cfg.build(node)49    node = reaching_definitions.resolve(node, ctx, graphs)50    node = reaching_fndefs.resolve(node, ctx, graphs)51    node = type_inference.resolve(node, ctx, graphs, self.resolver)52    return node53class TypeInferenceAnalyzerTest(test.TestCase):54  def assertTypes(self, node, expected):55    if not isinstance(expected, tuple):56      expected = expected,57    self.assertSetEqual(58        set(anno.getanno(node, anno.Static.TYPES)), set(expected))59  def assertClosureTypes(self, node, expected):60    actual = anno.getanno(node, anno.Static.CLOSURE_TYPES)61    actual = {str(k): v for k, v in actual.items()}62    for k, v in expected.items():63      self.assertIn(k, actual)64      self.assertEqual(actual[k], v)65  def test_no_inference_on_unknown_operand_types(self):66    class Resolver(type_inference.Resolver):67      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):68        return None69    def test_fn(a, b):70      return a < b, a - b71    node, _ = TestTranspiler(Resolver).transform(test_fn, None)72    fn_body = node.body73    # With no information on operand types, the operators will infer nothing.74    self.assertFalse(75        anno.hasanno(fn_body[0].value.elts[0], anno.Static.TYPES))76    self.assertFalse(77        anno.hasanno(fn_body[0].value.elts[1], anno.Static.TYPES))78  def test_resolver_output_checked(self):79    class Resolver(type_inference.Resolver):80      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):81        return 182    def test_fn(a):83      del a84      pass85    with self.assertRaisesRegex(ValueError, 'expected to return set'):86      TestTranspiler(Resolver).transform(test_fn, None)87  def test_argument(self):88    test_self = self89    class Resolver(type_inference.Resolver):90      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):91        test_self.assertFalse(f_is_local)92        if name == qual_names.QN('a'):93          test_self.assertEqual(type_anno, qual_names.QN('int'))94        return {str(name) + '_type'}95    def test_fn(a: int, b):96      return a, b97    node, _ = TestTranspiler(Resolver).transform(test_fn, None)98    fn_body = node.body99    self.assertTypes(fn_body[0].value.elts[0], 'a_type')100    self.assertTypes(fn_body[0].value.elts[1], 'b_type')101  def test_argument_of_local_function(self):102    test_self = self103    class Resolver(type_inference.Resolver):104      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):105        if f_name == 'test_fn':106          test_self.assertFalse(f_is_local)107          test_self.assertEqual(name, qual_names.QN('a'))108          test_self.assertEqual(type_anno, qual_names.QN('int'))109        elif f_name == 'foo':110          test_self.assertTrue(f_is_local)111          if name == qual_names.QN('x'):112            test_self.assertEqual(type_anno, qual_names.QN('float'))113          elif name == qual_names.QN('y'):114            test_self.assertIsNone(type_anno)115          else:116            test_self.fail('unexpected argument {} for {}'.format(name, f_name))117        else:118          test_self.fail('unexpected function name {}'.format(f_name))119        return {str(name) + '_type'}120    def test_fn(a: int):121      def foo(x: float, y):122        return x, y123      return foo(a, a)124    tr = TestTranspiler(Resolver)125    node, _ = tr.transform(test_fn, None)126    fn_body = node.body127    self.assertTypes(fn_body[0].body[0].value, (('x_type', 'y_type'),))128    self.assertTypes(fn_body[0].body[0].value.elts[0], 'x_type')129    self.assertTypes(fn_body[0].body[0].value.elts[1], 'y_type')130  def test_assign_straightline(self):131    def test_fn(a: int, c: float):132      b = a133      return a, b, c134    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)135    fn_body = node.body136    self.assertTypes(fn_body[0].targets[0], 'int')137    self.assertTypes(fn_body[0].value, 'int')138    self.assertTypes(fn_body[1].value.elts[0], 'int')139    self.assertTypes(fn_body[1].value.elts[1], 'int')140    self.assertTypes(fn_body[1].value.elts[2], 'float')141  def test_expr(self):142    test_self = self143    class Resolver(type_inference.Resolver):144      def res_value(self, ns, value):145        test_self.assertEqual(value, tc.a)146        return {str}147      def res_name(self, ns, types_ns, name):148        test_self.assertEqual(name, qual_names.QN('tc'))149        return {TestClass}, tc150      def res_call(self, ns, types_ns, node, f_type, args, keywords):151        test_self.assertEqual(f_type, (str,))152        return {int}, None153    class TestClass:154      def a(self):155        pass156    tc = TestClass()157    def test_fn():158      tc.a()159    node, _ = TestTranspiler(Resolver).transform(test_fn, None)160    fn_body = node.body161    self.assertEqual(162        anno.getanno(fn_body[0].value.func, anno.Static.VALUE), tc.a)163    self.assertTypes(fn_body[0].value.func, str)164    self.assertTypes(fn_body[0].value, int)165    self.assertTypes(fn_body[0], int)166  def test_assign_overwriting(self):167    def test_fn(a: int, b: float):168      c = a169      c = b170      return c171    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)172    fn_body = node.body173    self.assertTypes(fn_body[0].targets[0], 'int')174    self.assertTypes(fn_body[0].value, 'int')175    self.assertTypes(fn_body[1].targets[0], 'float')176    self.assertTypes(fn_body[1].value, 'float')177  def test_dynamic_attribute_of_static_value(self):178    test_self = self179    class Resolver(type_inference.Resolver):180      def res_value(self, ns, value):181        test_self.assertEqual(value, tc.a)182        return {int}183      def res_name(self, ns, types_ns, name):184        test_self.assertEqual(name, qual_names.QN('tc'))185        return {TestClass}, tc186    class TestClass:187      def __init__(self):188        self.a = 1189    tc = TestClass()190    def test_fn():191      return tc.a192    node, _ = TestTranspiler(Resolver).transform(test_fn, None)193    fn_body = node.body194    self.assertTypes(fn_body[0].value.value, TestClass)195    self.assertTypes(fn_body[0].value, int)196    self.assertIs(anno.getanno(fn_body[0].value.value, anno.Static.VALUE), tc)197    self.assertEqual(anno.getanno(fn_body[0].value, anno.Static.VALUE), tc.a)198  def test_static_attribute_of_typed_value(self):199    test_self = self200    class TestClass:201      a = 1202    tc = TestClass()203    class Resolver(type_inference.Resolver):204      def res_name(self, ns, types_ns, name):205        test_self.assertEqual(name, qual_names.QN('tc'))206        return {TestClass}, None207      def res_value(self, ns, value):208        test_self.assertIs(value, tc.a)209        return {str}210    def test_fn():211      return tc.a212    node, _ = TestTranspiler(Resolver).transform(test_fn, None)213    fn_body = node.body214    self.assertTypes(fn_body[0].value.value, TestClass)215    self.assertTypes(fn_body[0].value, str)  # Resolver is SOT216    self.assertFalse(anno.hasanno(fn_body[0].value.value, anno.Static.VALUE))217    self.assertEqual(anno.getanno(fn_body[0].value, anno.Static.VALUE), 1)218  def test_static_attribute_of_ambiguous_type(self):219    test_self = self220    class TestClass1:221      a = 1222    class TestClass2:223      a = 2224    tc = TestClass1()225    class Resolver(type_inference.Resolver):226      def res_name(self, ns, types_ns, name):227        test_self.assertEqual(name, qual_names.QN('tc'))228        return {TestClass1, TestClass2}, None229      def res_value(self, ns, value):230        test_self.assertIn(value, (1, 2))231        return {str}232    def test_fn():233      return tc.a234    node, _ = TestTranspiler(Resolver).transform(test_fn, None)235    fn_body = node.body236    self.assertTypes(fn_body[0].value.value, (TestClass1, TestClass2))237    self.assertFalse(anno.hasanno(fn_body[0].value, anno.Static.TYPES))238    self.assertFalse(anno.hasanno(fn_body[0].value.value, anno.Static.VALUE))239    self.assertFalse(anno.hasanno(fn_body[0].value, anno.Static.VALUE))240  def test_property_of_typed_value(self):241    test_self = self242    class TestClass:243      @property244      def a(self):245        return 1246    tc = TestClass()247    class Resolver(type_inference.Resolver):248      def res_name(self, ns, types_ns, name):249        test_self.assertEqual(name, qual_names.QN('tc'))250        return {TestClass}, None251      def res_value(self, ns, value):252        test_self.assertIs(value, TestClass.a)253        test_self.assertNotEqual(value, 1)  # Can't evaluate property of class.254        return {property}255    def test_fn():256      return tc.a257    node, _ = TestTranspiler(Resolver).transform(test_fn, None)258    fn_body = node.body259    self.assertTypes(fn_body[0].value.value, TestClass)260    self.assertTypes(fn_body[0].value, property)261    self.assertFalse(anno.hasanno(fn_body[0].value.value, anno.Static.VALUE))262    self.assertEqual(263        anno.getanno(fn_body[0].value, anno.Static.VALUE), TestClass.a)264  def test_dynamic_attribute_of_typed_value(self):265    test_self = self266    class TestClass:267      def __init__(self):268        self.a = 1269    tc = TestClass()270    class Resolver(type_inference.Resolver):271      def res_name(self, ns, types_ns, name):272        test_self.assertEqual(name, qual_names.QN('tc'))273        return {TestClass}, None274    def test_fn():275      return tc.a276    node, _ = TestTranspiler(Resolver).transform(test_fn, None)277    fn_body = node.body278    self.assertTypes(fn_body[0].value.value, TestClass)279    self.assertFalse(anno.hasanno(fn_body[0].value, anno.Static.TYPES))280    self.assertFalse(anno.hasanno(fn_body[0].value.value, anno.Static.VALUE))281    self.assertFalse(anno.hasanno(fn_body[0].value, anno.Static.VALUE))282  def test_external_value(self):283    a = 'foo'284    def test_fn():285      b = a286      return b287    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)288    fn_body = node.body289    self.assertTypes(fn_body[0].targets[0], str)290    self.assertTypes(fn_body[1].value, str)291  def test_external_function(self):292    test_self = self293    class Resolver(type_inference.Resolver):294      def res_name(self, ns, types_ns, name):295        test_self.assertEqual(name, qual_names.QN('g'))296        return {str}, g297      def res_call(self, ns, types_ns, node, f_type, args, keywords):298        test_self.assertEqual(f_type, (str,))299        test_self.assertEqual(300            anno.getanno(node.func, anno.Basic.QN), qual_names.QN('g'))301        return {float}, None302    def g() -> float:303      return 1.0304    def test_fn():305      a = g()306      return a307    node, _ = TestTranspiler(Resolver).transform(test_fn, None)308    fn_body = node.body309    self.assertTypes(fn_body[0].value.func, str)310    self.assertTypes(fn_body[0].targets[0], float)311    self.assertTypes(fn_body[1].value, float)312  def test_external_function_side_effects(self):313    test_self = self314    class Resolver(type_inference.Resolver):315      def res_name(self, ns, types_ns, name):316        test_self.assertEqual(name, qual_names.QN('g'))317        return None, g318      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):319        return {str(type_anno)}320      def res_call(self, ns, types_ns, node, f_type, args, keywords):321        test_self.assertIsNone(f_type)322        return None, {qual_names.QN('x'): {str}}323    def g():324      # The resolver will pretend that this function has the following body:325      #326      #   nonlocal x327      #   x = 'a'328      pass329    def test_fn(x: int):330      y = x331      g()332      return x, y333    node, _ = TestTranspiler(Resolver).transform(test_fn, None)334    fn_body = node.body335    self.assertTypes(fn_body[0].targets[0], 'int')336    self.assertTypes(fn_body[0].value, 'int')337    self.assertTypes(fn_body[2].value.elts[0], str)338    self.assertTypes(fn_body[2].value.elts[1], 'int')339  def test_local_function_closure(self):340    def test_fn(x: int):341      def foo():342        return x343      foo()344    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)345    fn_body = node.body346    self.assertTypes(fn_body[0].body[0].value, 'int')347    self.assertClosureTypes(fn_body[0], {'x': {'int'}})348  def test_local_function_closure_nested(self):349    def test_fn(x: int):350      def foo():351        def bar():352          return x353        bar()354      foo()355    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)356    fn_body = node.body357    self.assertTypes(fn_body[0].body[0].body[0].value, 'int')358    self.assertClosureTypes(fn_body[0], {'x': {'int'}})359    self.assertClosureTypes(fn_body[0].body[0], {'x': {'int'}})360  def test_local_function_closure_mutable_var(self):361    def test_fn(x: int):362      def foo():363        nonlocal x364        return x365      foo()366    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)367    fn_body = node.body368    self.assertTypes(fn_body[0].body[1].value, 'int')369    self.assertClosureTypes(fn_body[0], {'x': {'int'}})370  def test_local_function_closure_ignored_for_bound_symbols(self):371    def test_fn(x: float):  # pylint:disable=unused-argument372      def foo():373        x = x + 1  # pylint:disable=used-before-assignment374      foo()375    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)376    fn_body = node.body377    self.assertFalse(378        anno.hasanno(fn_body[0].body[0].value.left, anno.Static.TYPES))379    self.assertClosureTypes(fn_body[0], {'x': {'float'}})380  def test_local_function_closure_uses_call_site_types(self):381    def test_fn(x: int):382      def foo():383        return x384      x = 1.0385      foo()386    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)387    fn_body = node.body388    self.assertTypes(fn_body[0].body[0].value, float)389    self.assertTypes(fn_body[1].targets[0], float)390    self.assertClosureTypes(fn_body[0], {'x': {float}})391  def test_local_function_hides_locals(self):392    def test_fn(a: int):  # pylint:disable=unused-argument393      def local_fn(v):394        a = v395        return a396      local_fn(1)397    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)398    fn_body = node.body399    self.assertFalse(400        anno.hasanno(fn_body[0].body[0].targets[0], anno.Static.TYPES))401  def test_local_function_type(self):402    def test_fn(x: int):403      def foo() -> int:404        return x405      foo()406    node, _ = TestTranspiler(BasicTestResolver).transform(test_fn, None)407    fn_body = node.body408    self.assertTypes(fn_body[1].value.func, Callable[[Any], int])409    self.assertTypes(fn_body[1].value, int)410    self.assertTypes(fn_body[1], int)411  def test_side_effects_on_arg_function_closure(self):412    test_self = self413    class Resolver(type_inference.Resolver):414      def res_name(self, ns, types_ns, name):415        test_self.assertEqual(name, qual_names.QN('g'))416        return {Callable[[Callable], None]}, g417      def res_value(self, ns, value):418        test_self.assertEqual(value, 1.0)419        return {float}420      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):421        return {str(type_anno)}422      def res_call(self, ns, types_ns, node, f_type, args, keywords):423        test_self.assertEqual(node.func.id, 'g')424        test_self.assertEqual(f_type, (Callable[[Callable], None],))425        return None, {qual_names.QN('x'): {str}}426    def g(foo):427      # The resolver will convey that this function has the following body:428      #429      #   nonlocal x430      #   x = 'a'431      #   foo()432      del foo433      pass434    def test_fn(x: int):  # pylint:disable=unused-argument435      def foo():436        return x437      x = 1.0438      g(foo)439    node, _ = TestTranspiler(Resolver).transform(test_fn, None)440    fn_body = node.body441    self.assertTypes(fn_body[0].body[0].value, str)442  def test_subscript(self):443    test_self = self444    class Resolver(type_inference.Resolver):445      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):446        return {list}447      def res_value(self, ns, value):448        return {int}449      def res_slice(self, ns, types_ns, node, value, slice_):450        test_self.assertSetEqual(value, {list})451        test_self.assertSetEqual(slice_, {int})452        return {str}453    def test_fn(a):454      return a[1]455    node, _ = TestTranspiler(Resolver).transform(test_fn, None)456    fn_body = node.body457    self.assertTypes(fn_body[0].value, str)458    self.assertTypes(fn_body[0].value.value, list)459    self.assertTypes(fn_body[0].value.slice, int)460  def test_tuple_unpacking(self):461    test_self = self462    class Resolver(type_inference.Resolver):463      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):464        return {list}465      def res_value(self, ns, value):466        return {int}467      def res_slice(self, ns, types_ns, node_or_slice, value, slice_):468        test_self.assertIn(node_or_slice, (0, 1))469        test_self.assertSetEqual(value, {list})470        test_self.assertSetEqual(slice_, {int})471        if node_or_slice == 0:472          return {float}473        else:474          return {str}475    def test_fn(t):476      a, b = t477      return a, b478    node, _ = TestTranspiler(Resolver).transform(test_fn, None)479    fn_body = node.body480    self.assertTypes(fn_body[1].value, ((float, str),))481    self.assertTypes(fn_body[1].value.elts[0], float)482    self.assertTypes(fn_body[1].value.elts[1], str)483  def test_compare(self):484    test_self = self485    class Resolver(type_inference.Resolver):486      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):487        return {int}488      def res_compare(self, ns, types_ns, node, left, right):489        test_self.assertSetEqual(left, {int})490        test_self.assertListEqual(right, [{int}])491        return {bool}492    def test_fn(a, b):493      return a < b494    node, _ = TestTranspiler(Resolver).transform(test_fn, None)495    fn_body = node.body496    self.assertTypes(fn_body[0].value, bool)497    self.assertTypes(fn_body[0].value.left, int)498    self.assertTypes(fn_body[0].value.comparators[0], int)499  def test_binop(self):500    test_self = self501    class Resolver(type_inference.Resolver):502      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):503        return {list}504      def res_binop(self, ns, types_ns, node, left, right):505        test_self.assertSetEqual(left, {list})506        test_self.assertSetEqual(right, {list})507        return {float}508    def test_fn(a, b):509      return a @ b510    node, _ = TestTranspiler(Resolver).transform(test_fn, None)511    fn_body = node.body512    self.assertTypes(fn_body[0].value, float)513    self.assertTypes(fn_body[0].value.left, list)514    self.assertTypes(fn_body[0].value.right, list)515  def test_unop(self):516    class Resolver(type_inference.Resolver):517      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):518        return {list}519      def res_unop(self, ns, types_ns, node, opnd):520        return {float}521    def test_fn(a):522      return -a523    node, _ = TestTranspiler(Resolver).transform(test_fn, None)524    fn_body = node.body525    self.assertTypes(fn_body[0].value, float)526    self.assertTypes(fn_body[0].value.operand, list)527  def test_tuple_literal(self):528    class Resolver(type_inference.Resolver):529      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):530        return {int}531    def test_fn(a, b):532      return a, b533    node, _ = TestTranspiler(Resolver).transform(test_fn, None)534    fn_body = node.body535    self.assertTypes(fn_body[0].value, ((int, int),))536    self.assertTypes(fn_body[0].value.elts[0], int)537    self.assertTypes(fn_body[0].value.elts[1], int)538  def test_list_literal(self):539    class Resolver(type_inference.Resolver):540      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):541        return {int}542      def res_list_literal(self, ns, elt_types):543        all_types = set()544        for s in elt_types:545          all_types |= s546        return {List[t] for t in all_types}547    def test_fn(a, b):548      return [a, b]549    node, _ = TestTranspiler(Resolver).transform(test_fn, None)550    fn_body = node.body551    self.assertTypes(fn_body[0].value, List[int])552    self.assertTypes(fn_body[0].value.elts[0], int)553    self.assertTypes(fn_body[0].value.elts[1], int)554  def test_tuple_unpacking_syntactic(self):555    test_self = self556    class Resolver(type_inference.Resolver):557      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):558        if name == qual_names.QN('a'):559          return {int}560        else:561          return {float}562      def res_value(self, ns, value):563        test_self.assertIn(value, (0, 1))564        return int565      def res_slice(self, ns, types_ns, node_or_slice, value, slice_):566        test_self.assertIn(node_or_slice, (0, 1))567        test_self.assertSetEqual(value, {(int, float)})568        test_self.assertEqual(slice_, int)569        return {t[node_or_slice] for t in value}570    def test_fn(a, b):571      c, d = a, b572      return c, d573    node, _ = TestTranspiler(Resolver).transform(test_fn, None)574    fn_body = node.body575    self.assertTypes(fn_body[1].value, ((int, float),))576    self.assertTypes(fn_body[1].value.elts[0], int)577    self.assertTypes(fn_body[1].value.elts[1], float)578  def test_tuple_unpacking_operational(self):579    test_self = self580    class Resolver(type_inference.Resolver):581      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):582        return {(int, float)}583      def res_value(self, ns, value):584        test_self.assertIn(value, (0, 1))585        return int586      def res_slice(self, ns, types_ns, node_or_slice, value, slice_):587        test_self.assertIn(node_or_slice, (0, 1))588        test_self.assertSetEqual(value, {(int, float)})589        test_self.assertEqual(slice_, int)590        return {t[node_or_slice] for t in value}591    def test_fn(a):592      c, d = a593      return c, d594    node, _ = TestTranspiler(Resolver).transform(test_fn, None)595    fn_body = node.body596    self.assertTypes(fn_body[1].value, ((int, float),))597    self.assertTypes(fn_body[1].value.elts[0], int)598    self.assertTypes(fn_body[1].value.elts[1], float)599  def test_list_expansion_syntactic(self):600    test_self = self601    class Resolver(type_inference.Resolver):602      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):603        if name == qual_names.QN('a'):604          return {int}605        else:606          return {float}607      def res_value(self, ns, value):608        test_self.assertIn(value, (0, 1))609        return int610      def res_slice(self, ns, types_ns, node_or_slice, value, slice_):611        test_self.assertIn(node_or_slice, (0, 1))612        test_self.assertSetEqual(value, {(int, float)})613        test_self.assertEqual(slice_, int)614        return {t[node_or_slice] for t in value}615    def test_fn(a, b):616      [c, d] = a, b617      return c, d618    node, _ = TestTranspiler(Resolver).transform(test_fn, None)619    fn_body = node.body620    # TODO(mdan): Whether it's List or Tuple might be open for interpretation.621    self.assertTypes(fn_body[1].value, ((int, float),))622    self.assertTypes(fn_body[1].value.elts[0], int)623    self.assertTypes(fn_body[1].value.elts[1], float)624  def test_list_expansion_operational(self):625    test_self = self626    class Resolver(type_inference.Resolver):627      def res_arg(self, ns, types_ns, f_name, name, type_anno, f_is_local):628        if name == qual_names.QN('a'):629          return {int}630        else:631          return {float}632      def res_value(self, ns, value):633        test_self.assertIn(value, (0, 1))634        return int635      def res_slice(self, ns, types_ns, node_or_slice, value, slice_):636        test_self.assertIn(node_or_slice, (0, 1))637        test_self.assertSetEqual(value, {(int, float)})638        test_self.assertEqual(slice_, int)639        return {t[node_or_slice] for t in value}640    def test_fn(a, b):641      [c, d] = a, b642      return c, d643    node, _ = TestTranspiler(Resolver).transform(test_fn, None)644    fn_body = node.body645    # TODO(mdan): Whether it's List or Tuple might be open for interpretation.646    self.assertTypes(fn_body[1].value, ((int, float),))647    self.assertTypes(fn_body[1].value.elts[0], int)648    self.assertTypes(fn_body[1].value.elts[1], float)649if __name__ == '__main__':...
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