Create --preview CLI flag (#2752)

[etc/vim.git] / tests / test_format.py

diff --git a/tests/test_format.py b/tests/test_format.py
index db39678cdfe57e41c5f29641ca18e935b335dc74..00cd07f36f737b2797808b8aa630d371915cdcf9 100644 (file)
--- a/tests/test_format.py
+++ b/tests/test_format.py
@@ -1,5 +1,5 @@
 from dataclasses import replace
-from typing import Any, Iterator
+from typing import Any, Iterator, List
 from unittest.mock import patch
 
 import pytest
@@ -14,7 +14,7 @@ from tests.util import (
     read_data,
 )
 
-SIMPLE_CASES = [
+SIMPLE_CASES: List[str] = [
     "beginning_backslash",
     "bracketmatch",
     "class_blank_parentheses",
@@ -55,7 +55,7 @@ SIMPLE_CASES = [
     "tupleassign",
 ]
 
-EXPERIMENTAL_STRING_PROCESSING_CASES = [
+EXPERIMENTAL_STRING_PROCESSING_CASES: List[str] = [
     "cantfit",
     "comments7",
     "long_strings",
@@ -64,7 +64,7 @@ EXPERIMENTAL_STRING_PROCESSING_CASES = [
     "percent_precedence",
 ]
 
-PY310_CASES = [
+PY310_CASES: List[str] = [
     "pattern_matching_simple",
     "pattern_matching_complex",
     "pattern_matching_extras",
@@ -73,7 +73,9 @@ PY310_CASES = [
     "parenthesized_context_managers",
 ]
 
-SOURCES = [
+PREVIEW_CASES: List[str] = []
+
+SOURCES: List[str] = [
     "src/black/__init__.py",
     "src/black/__main__.py",
     "src/black/brackets.py",
@@ -139,6 +141,11 @@ def test_experimental_format(filename: str) -> None:
     check_file(filename, black.Mode(experimental_string_processing=True))
 
 
+@pytest.mark.parametrize("filename", PREVIEW_CASES)
+def test_preview_format(filename: str) -> None:
+    check_file(filename, black.Mode(preview=True))
+
+
 @pytest.mark.parametrize("filename", SOURCES)
 def test_source_is_formatted(filename: str) -> None:
     path = THIS_DIR.parent / filename