]> git.madduck.net Git - etc/vim.git/blobdiff - tests/test_black.py

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

Normalize string quotes (#75)
[etc/vim.git] / tests / test_black.py
index 7dba611141c099e9054421f55bd371ac242fced3..30ecaf693a4346f0a487074d38969c29ece034d1 100644 (file)
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 from functools import partial
 from io import StringIO
+import os
 from pathlib import Path
 import sys
 from typing import Any, List, Tuple
@@ -16,23 +17,25 @@ ff = partial(black.format_file_in_place, line_length=ll, fast=True)
 fs = partial(black.format_str, line_length=ll)
 THIS_FILE = Path(__file__)
 THIS_DIR = THIS_FILE.parent
+EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)"
 
 
 def dump_to_stderr(*output: str) -> str:
-    return '\n' + '\n'.join(output) + '\n'
+    return "\n" + "\n".join(output) + "\n"
 
 
 def read_data(name: str) -> Tuple[str, str]:
     """read_data('test_name') -> 'input', 'output'"""
-    if not name.endswith('.py'):
-        name += '.py'
+    if not name.endswith((".py", ".out")):
+        name += ".py"
     _input: List[str] = []
     _output: List[str] = []
-    with open(THIS_DIR / name, 'r', encoding='utf8') as test:
+    with open(THIS_DIR / name, "r", encoding="utf8") as test:
         lines = test.readlines()
     result = _input
     for line in lines:
-        if line.rstrip() == '# output':
+        line = line.replace(EMPTY_LINE, "")
+        if line.rstrip() == "# output":
             result = _output
             continue
 
@@ -40,23 +43,23 @@ def read_data(name: str) -> Tuple[str, str]:
     if _input and not _output:
         # If there's no output marker, treat the entire file as already pre-formatted.
         _output = _input[:]
-    return ''.join(_input).strip() + '\n', ''.join(_output).strip() + '\n'
+    return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n"
 
 
 class BlackTestCase(unittest.TestCase):
     maxDiff = None
 
     def assertFormatEqual(self, expected: str, actual: str) -> None:
-        if actual != expected:
+        if actual != expected and not os.environ.get("SKIP_AST_PRINT"):
             bdv: black.DebugVisitor[Any]
-            black.out('Expected tree:', fg='green')
+            black.out("Expected tree:", fg="green")
             try:
                 exp_node = black.lib2to3_parse(expected)
                 bdv = black.DebugVisitor()
                 list(bdv.visit(exp_node))
             except Exception as ve:
                 black.err(str(ve))
-            black.out('Actual tree:', fg='red')
+            black.out("Actual tree:", fg="red")
             try:
                 exp_node = black.lib2to3_parse(actual)
                 bdv = black.DebugVisitor()
@@ -67,7 +70,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_self(self) -> None:
-        source, expected = read_data('test_black')
+        source, expected = read_data("test_black")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -76,19 +79,19 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_black(self) -> None:
-        source, expected = read_data('../black')
+        source, expected = read_data("../black")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
-        self.assertFalse(ff(THIS_DIR / '..' / 'black.py'))
+        self.assertFalse(ff(THIS_DIR / ".." / "black.py"))
 
     def test_piping(self) -> None:
-        source, expected = read_data('../black')
+        source, expected = read_data("../black")
         hold_stdin, hold_stdout = sys.stdin, sys.stdout
         try:
             sys.stdin, sys.stdout = StringIO(source), StringIO()
-            sys.stdin.name = '<stdin>'
+            sys.stdin.name = "<stdin>"
             black.format_stdin_to_stdout(line_length=ll, fast=True, write_back=True)
             sys.stdout.seek(0)
             actual = sys.stdout.read()
@@ -100,16 +103,16 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_setup(self) -> None:
-        source, expected = read_data('../setup')
+        source, expected = read_data("../setup")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
-        self.assertFalse(ff(THIS_DIR / '..' / 'setup.py'))
+        self.assertFalse(ff(THIS_DIR / ".." / "setup.py"))
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_function(self) -> None:
-        source, expected = read_data('function')
+        source, expected = read_data("function")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -117,7 +120,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_expression(self) -> None:
-        source, expected = read_data('expression')
+        source, expected = read_data("expression")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -125,7 +128,15 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_fstring(self) -> None:
-        source, expected = read_data('fstring')
+        source, expected = read_data("fstring")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_string_quotes(self) -> None:
+        source, expected = read_data("string_quotes")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -133,7 +144,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_comments(self) -> None:
-        source, expected = read_data('comments')
+        source, expected = read_data("comments")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -141,7 +152,23 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_comments2(self) -> None:
-        source, expected = read_data('comments2')
+        source, expected = read_data("comments2")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_comments3(self) -> None:
+        source, expected = read_data("comments3")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_comments4(self) -> None:
+        source, expected = read_data("comments4")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -149,7 +176,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_cantfit(self) -> None:
-        source, expected = read_data('cantfit')
+        source, expected = read_data("cantfit")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -157,7 +184,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_import_spacing(self) -> None:
-        source, expected = read_data('import_spacing')
+        source, expected = read_data("import_spacing")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -165,7 +192,7 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_composition(self) -> None:
-        source, expected = read_data('composition')
+        source, expected = read_data("composition")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -173,7 +200,23 @@ class BlackTestCase(unittest.TestCase):
 
     @patch("black.dump_to_file", dump_to_stderr)
     def test_empty_lines(self) -> None:
-        source, expected = read_data('empty_lines')
+        source, expected = read_data("empty_lines")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_python2(self) -> None:
+        source, expected = read_data("python2")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        # black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_fmtonoff(self) -> None:
+        source, expected = read_data("fmtonoff")
         actual = fs(source)
         self.assertFormatEqual(expected, actual)
         black.assert_equivalent(source, actual)
@@ -191,60 +234,69 @@ class BlackTestCase(unittest.TestCase):
             err_lines.append(msg)
 
         with patch("black.out", out), patch("black.err", err):
-            report.done(Path('f1'), changed=False)
+            report.done(Path("f1"), changed=False)
             self.assertEqual(len(out_lines), 1)
             self.assertEqual(len(err_lines), 0)
-            self.assertEqual(out_lines[-1], 'f1 already well formatted, good job.')
-            self.assertEqual(unstyle(str(report)), '1 file left unchanged.')
+            self.assertEqual(out_lines[-1], "f1 already well formatted, good job.")
+            self.assertEqual(unstyle(str(report)), "1 file left unchanged.")
             self.assertEqual(report.return_code, 0)
-            report.done(Path('f2'), changed=True)
+            report.done(Path("f2"), changed=True)
             self.assertEqual(len(out_lines), 2)
             self.assertEqual(len(err_lines), 0)
-            self.assertEqual(out_lines[-1], 'reformatted f2')
+            self.assertEqual(out_lines[-1], "reformatted f2")
             self.assertEqual(
-                unstyle(str(report)), '1 file reformatted, 1 file left unchanged.'
+                unstyle(str(report)), "1 file reformatted, 1 file left unchanged."
             )
+            self.assertEqual(report.return_code, 0)
+            report.check = True
             self.assertEqual(report.return_code, 1)
-            report.failed(Path('e1'), 'boom')
+            report.check = False
+            report.failed(Path("e1"), "boom")
             self.assertEqual(len(out_lines), 2)
             self.assertEqual(len(err_lines), 1)
-            self.assertEqual(err_lines[-1], 'error: cannot format e1: boom')
+            self.assertEqual(err_lines[-1], "error: cannot format e1: boom")
             self.assertEqual(
                 unstyle(str(report)),
-                '1 file reformatted, 1 file left unchanged, '
-                '1 file failed to reformat.',
+                "1 file reformatted, 1 file left unchanged, "
+                "1 file failed to reformat.",
             )
             self.assertEqual(report.return_code, 123)
-            report.done(Path('f3'), changed=True)
+            report.done(Path("f3"), changed=True)
             self.assertEqual(len(out_lines), 3)
             self.assertEqual(len(err_lines), 1)
-            self.assertEqual(out_lines[-1], 'reformatted f3')
+            self.assertEqual(out_lines[-1], "reformatted f3")
             self.assertEqual(
                 unstyle(str(report)),
-                '2 files reformatted, 1 file left unchanged, '
-                '1 file failed to reformat.',
+                "2 files reformatted, 1 file left unchanged, "
+                "1 file failed to reformat.",
             )
             self.assertEqual(report.return_code, 123)
-            report.failed(Path('e2'), 'boom')
+            report.failed(Path("e2"), "boom")
             self.assertEqual(len(out_lines), 3)
             self.assertEqual(len(err_lines), 2)
-            self.assertEqual(err_lines[-1], 'error: cannot format e2: boom')
+            self.assertEqual(err_lines[-1], "error: cannot format e2: boom")
             self.assertEqual(
                 unstyle(str(report)),
-                '2 files reformatted, 1 file left unchanged, '
-                '2 files failed to reformat.',
+                "2 files reformatted, 1 file left unchanged, "
+                "2 files failed to reformat.",
             )
             self.assertEqual(report.return_code, 123)
-            report.done(Path('f4'), changed=False)
+            report.done(Path("f4"), changed=False)
             self.assertEqual(len(out_lines), 4)
             self.assertEqual(len(err_lines), 2)
-            self.assertEqual(out_lines[-1], 'f4 already well formatted, good job.')
+            self.assertEqual(out_lines[-1], "f4 already well formatted, good job.")
             self.assertEqual(
                 unstyle(str(report)),
-                '2 files reformatted, 2 files left unchanged, '
-                '2 files failed to reformat.',
+                "2 files reformatted, 2 files left unchanged, "
+                "2 files failed to reformat.",
             )
             self.assertEqual(report.return_code, 123)
+            report.check = True
+            self.assertEqual(
+                unstyle(str(report)),
+                "2 files would be reformatted, 2 files would be left unchanged, "
+                "2 files would fail to reformat.",
+            )
 
     def test_is_python36(self) -> None:
         node = black.lib2to3_parse("def f(*, arg): ...\n")
@@ -253,17 +305,41 @@ class BlackTestCase(unittest.TestCase):
         self.assertTrue(black.is_python36(node))
         node = black.lib2to3_parse("def f(*, arg): f'string'\n")
         self.assertTrue(black.is_python36(node))
-        source, expected = read_data('function')
+        source, expected = read_data("function")
         node = black.lib2to3_parse(source)
         self.assertTrue(black.is_python36(node))
         node = black.lib2to3_parse(expected)
         self.assertTrue(black.is_python36(node))
-        source, expected = read_data('expression')
+        source, expected = read_data("expression")
         node = black.lib2to3_parse(source)
         self.assertFalse(black.is_python36(node))
         node = black.lib2to3_parse(expected)
         self.assertFalse(black.is_python36(node))
 
+    def test_debug_visitor(self) -> None:
+        source, _ = read_data("debug_visitor.py")
+        expected, _ = read_data("debug_visitor.out")
+        out_lines = []
+        err_lines = []
+
+        def out(msg: str, **kwargs: Any) -> None:
+            out_lines.append(msg)
+
+        def err(msg: str, **kwargs: Any) -> None:
+            err_lines.append(msg)
+
+        with patch("black.out", out), patch("black.err", err):
+            black.DebugVisitor.show(source)
+        actual = "\n".join(out_lines) + "\n"
+        log_name = ""
+        if expected != actual:
+            log_name = black.dump_to_file(*out_lines)
+        self.assertEqual(
+            expected,
+            actual,
+            f"AST print out is different. Actual version dumped to {log_name}",
+        )
+
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()