Add NamedExpr binding test

Author: dflook

test/test_bind_names_python312.py

@@ -165,3 +165,63 @@ def test_alias_paramspec_default():
 '''
 
     assert_namespace_tree(source, expected_namespaces)
+
+def test_namedexpr_in_module():
+    if sys.version_info < (3, 8):
+        pytest.skip('Test is for > python3.8 only')
+
+    source = '''
+(a := 1)
+'''
+
+    expected_namespaces = '''
++ Module
+  - NameBinding(name='a', allow_rename=True) <references=1>
+'''
+
+    assert_namespace_tree(source, expected_namespaces)
+
+def test_namedexpr_in_function():
+    if sys.version_info < (3, 8):
+        pytest.skip('Test is for > python3.8 only')
+
+    source = '''
+def test():
+    (a := 1)
+lambda x: (x := 1)
+'''
+
+    expected_namespaces = '''
++ Module
+  - NameBinding(name='test', allow_rename=True) <references=1>
+  + Function test
+    - NameBinding(name='a', allow_rename=True) <references=1>
+  + Lambda
+    - NameBinding(name='x', allow_rename=False) <references=2>
+'''
+
+    assert_namespace_tree(source, expected_namespaces)
+
+def test_namedexpr():
+    if sys.version_info < (3, 8):
+        pytest.skip('Test is for > python3.8 only')
+
+    source = '''
+def f(arg, /):
+  print([x for y in range(10) if (x := y // 2) & 1])
+  print(arg, arg)
+'''
+
+    expected_namespaces = '''
++ Module
+  - NameBinding(name='f', allow_rename=True) <references=1>
+  - BuiltinBinding(name='print', allow_rename=True) <references=2>
+  - BuiltinBinding(name='range', allow_rename=True) <references=1>
+  + Function f
+    - NameBinding(name='arg', allow_rename=True) <references=3>
+    - NameBinding(name='x', allow_rename=True) <references=2>
+    + ListComp
+      - NameBinding(name='y', allow_rename=True) <references=2>
+'''
+
+    assert_namespace_tree(source, expected_namespaces)