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ruff/crates/ruff_python_formatter/tests/snapshots/format@newlines.py.snap
konsti 317d3dd612
Add test and basic implementation for formatter preview mode (#8044) 
**Summary** Prepare for the black preview style becoming the black
stable style at the end of the year.

This adds a new test file to compare stable and preview on some relevant
preview options in black, and makes `format_dev` understand the black
preview flag. I've added poetry as a project that uses preview.

I've implemented one specific deviation (collapsing of stub
implementation in non-stub files) which showed up in poetry for testing.
This also improves poetry compatibility from 0.99891 to 0.99919.

Fixes #7440

New compatibility stats:
| project | similarity index | total files | changed files |

|----------------|------------------:|------------------:|------------------:|
| cpython | 0.75803 | 1799 | 1647 |
| django | 0.99983 | 2772 | 35 |
| home-assistant | 0.99953 | 10596 | 189 |
| poetry | 0.99919 | 317 | 12 |
| transformers | 0.99963 | 2657 | 332 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99978 | 3669 | 20 |
| warehouse | 0.99969 | 654 | 15 |
| zulip | 0.99970 | 1459 | 22 |
2023-10-26 15:33:26 +00:00

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---
source: crates/ruff_python_formatter/tests/fixtures.rs
input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/newlines.py
---
## Input
```py
###
# Blank lines around functions
###
import sys
x = 1
# comment
def f():
pass
if True:
x = 1
# comment
def f():
pass
x = 1
# comment
def f():
pass
x = 1
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
# comment
def f():
pass
# comment
def f():
pass
# comment
###
# Blank lines around imports.
###
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x # comment
# comment
import y
def f(): pass # comment
# comment
x = 1
def f():
pass
# comment
x = 1
def f():
if True:
def double(s):
return s + s
print("below function")
if True:
class A:
x = 1
print("below class")
if True:
def double(s):
return s + s
#
print("below comment function")
if True:
class A:
x = 1
#
print("below comment class")
if True:
def double(s):
return s + s
#
print("below comment function 2")
if True:
def double(s):
return s + s
#
def outer():
def inner():
pass
print("below nested functions")
if True:
def double(s):
return s + s
print("below function")
if True:
class A:
x = 1
print("below class")
def outer():
def inner():
pass
print("below nested functions")
class Path:
if sys.version_info >= (3, 11):
def joinpath(self): ...
# The .open method comes from pathlib.pyi and should be kept in sync.
@overload
def open(self): ...
def fakehttp():
class FakeHTTPConnection:
if mock_close:
def close(self):
pass
FakeHTTPConnection.fakedata = fakedata
if True:
if False:
def x():
def y():
pass
#comment
print()
# NOTE: Please keep this the last block in this file. This tests that we don't insert
# empty line(s) at the end of the file due to nested function
if True:
def nested_trailing_function():
pass```
## Output
```py
###
# Blank lines around functions
###
import sys
x = 1
# comment
def f():
pass
if True:
x = 1
# comment
def f():
pass
x = 1
# comment
def f():
pass
x = 1
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
x = 1
# comment
# comment
def f():
pass
# comment
def f():
pass
# comment
def f():
pass
# comment
###
# Blank lines around imports.
###
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x
# comment
import y
def f():
import x # comment
# comment
import y
def f():
pass # comment
# comment
x = 1
def f():
pass
# comment
x = 1
def f():
if True:
def double(s):
return s + s
print("below function")
if True:
class A:
x = 1
print("below class")
if True:
def double(s):
return s + s
#
print("below comment function")
if True:
class A:
x = 1
#
print("below comment class")
if True:
def double(s):
return s + s
#
print("below comment function 2")
if True:
def double(s):
return s + s
#
def outer():
def inner():
pass
print("below nested functions")
if True:
def double(s):
return s + s
print("below function")
if True:
class A:
x = 1
print("below class")
def outer():
def inner():
pass
print("below nested functions")
class Path:
if sys.version_info >= (3, 11):
def joinpath(self):
...
# The .open method comes from pathlib.pyi and should be kept in sync.
@overload
def open(self):
...
def fakehttp():
class FakeHTTPConnection:
if mock_close:
def close(self):
pass
FakeHTTPConnection.fakedata = fakedata
if True:
if False:
def x():
def y():
pass
# comment
print()
# NOTE: Please keep this the last block in this file. This tests that we don't insert
# empty line(s) at the end of the file due to nested function
if True:
def nested_trailing_function():
pass
```
## Preview changes
```diff
--- Stable
+++ Preview
@@ -245,13 +245,11 @@
class Path:
if sys.version_info >= (3, 11):
- def joinpath(self):
- ...
+ def joinpath(self): ...
# The .open method comes from pathlib.pyi and should be kept in sync.
@overload
- def open(self):
- ...
+ def open(self): ...
def fakehttp():
```
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