Fix tests

tests/data/preview/pep_572.py

@@ -1,14 +1,6 @@
-x[a:=0]
-x[a := 0]
-x[a := 0, b := 1]
-x[5, b := 0]
 x[(a:=0):]
 x[:(a:=0)]
 
 # output
-x[a := 0]
-x[a := 0]
-x[a := 0, b := 1]
-x[5, b := 0]
 x[(a := 0):]
 x[:(a := 0)]

tests/data/preview_py_310/pep_572.py

@@ -0,0 +1,12 @@
+x[a:=0]
+x[a := 0]
+x[a := 0, b := 1]
+x[5, b := 0]
+x[a:=0,b:=1]
+
+# output
+x[a := 0]
+x[a := 0]
+x[a := 0, b := 1]
+x[5, b := 0]
+x[a := 0, b := 1]

tests/test_format.py

@@ -56,6 +56,13 @@ def test_preview_context_managers_targeting_py39() -> None:
     assert_format(source, expected, mode, minimum_version=(3, 9))
 
 
+@pytest.mark.parametrize("filename", all_data_cases("preview_py_310"))
+def test_preview_python_310(filename: str) -> None:
+    source, expected = read_data("preview_py_310", filename)
+    mode = black.Mode(target_versions={black.TargetVersion.PY310}, preview=True)
+    assert_format(source, expected, mode, minimum_version=(3, 10))
+
+
 @pytest.mark.parametrize(
     "filename", all_data_cases("preview_context_managers/auto_detect")
 )