Assertion introspection via AST rewriting
Project description
Overview
Dessert is a utility library enabling Python code to introspect assertions raised via the assert statement.
It is a standalone version of the introspection code from pytest, and all credit is due to Holger Krekel and the pytest developers for this code.
Usage
Using dessert is fairly simple:
>>> with open(tmp_filename, "w") as f:
... _ = f.write("""
... def func():
... def x():
... return 1
... def y():
... return -1
... assert y() == x()
... """)
>>> import emport
>>> import dessert
>>> with dessert.rewrite_assertions_context():
... module = emport.import_file(tmp_filename)
>>> module.func() # doctest: +IGNORE_EXCEPTION_DETAIL +ELLIPSIS
Traceback (most recent call last):
...
assert y() == x()
AssertionError: assert -1 == 1
+ where -1 = <function y at ...>()
+ and 1 = <function x at ...>()
Licence
Dessert is released under the MIT license. It is 99% based on pytest, which is released under the MIT license.
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