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https://github.com/isidentical/teyit

Formatter for your Python unit tests
https://github.com/isidentical/teyit

Last synced: about 2 months ago
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Formatter for your Python unit tests

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README

        

# Teyit

An analyzer / formatter for your Python unit tests (more specifically, the tests written with the `unittest` module).

## Usage

```
usage: teyit [-h] [--pattern PATTERN] [--show-stats] [--fail-on-change] [paths ...]

positional arguments:
paths

optional arguments:
-h, --help show this help message and exit
--pattern PATTERN Wildcard pattern for capturing test files.
--show-stats Print out some debug stats related about refactorings
--fail-on-change Exit with status code 1 if any file changed
```

### Pre-commit Hook

```yaml
- repo: https://github.com/isidentical/teyit
rev: 0.4.3
hooks:
- id: teyit
```

## Examples

Here are some examples from CPython's test suite:

```diff
--- a/Lib/test/test_telnetlib.py
+++ b/Lib/test/test_telnetlib.py
@@ -48,7 +48,7 @@ def testContextManager(self):
self.assertIsNone(tn.get_socket())

def testTimeoutDefault(self):
- self.assertTrue(socket.getdefaulttimeout() is None)
+ self.assertIsNone(socket.getdefaulttimeout())
socket.setdefaulttimeout(30)
try:
telnet = telnetlib.Telnet(HOST, self.port)
@@ -215,7 +215,7 @@ def test_read_some(self):
# test 'at least one byte'
telnet = test_telnet([b'x' * 500])
data = telnet.read_some()
- self.assertTrue(len(data) >= 1)
+ self.assertGreaterEqual(len(data), 1)
# test EOF
telnet = test_telnet()
data = telnet.read_some()
```

```diff
--- a/Lib/test/test___future__.py
+++ b/Lib/test/test___future__.py
@@ -13,8 +13,9 @@ def test_names(self):
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
- self.assertTrue(
- name in given_feature_names,
+ self.assertIn(
+ name,
+ given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
```

```diff
--- a/Lib/test/test_abc.py
+++ b/Lib/test/test_abc.py
@@ -321,14 +321,14 @@ class A(metaclass=abc_ABCMeta):
class B:
pass
b = B()
- self.assertFalse(isinstance(b, A))
- self.assertFalse(isinstance(b, (A,)))
+ self.assertNotIsInstance(b, A)
+ self.assertNotIsInstance(b, (A,))
```

```diff
--- a/Lib/test/test_bigmem.py
+++ b/Lib/test/test_bigmem.py
@@ -536,25 +536,25 @@ def test_contains(self, size):
edge = _('-') * (size // 2)
s = _('').join([edge, SUBSTR, edge])
del edge
- self.assertTrue(SUBSTR in s)
- self.assertFalse(SUBSTR * 2 in s)
- self.assertTrue(_('-') in s)
- self.assertFalse(_('a') in s)
+ self.assertIn(SUBSTR, s)
+ self.assertNotIn(SUBSTR * 2, s)
+ self.assertIn(_('-'), s)
+ self.assertNotIn(_('a'), s)
```

## Public API

#### `teyit.refactor(source) -> str`

Run `teyit` on the given source code.