225 lines
6.2 KiB
Python
225 lines
6.2 KiB
Python
import sys
|
|
import py
|
|
import pytest
|
|
|
|
ast = pytest.importorskip("ast")
|
|
|
|
from _pytest.assertrewrite import rewrite_asserts
|
|
|
|
|
|
def setup_module(mod):
|
|
mod._old_reprcompare = py.code._reprcompare
|
|
py.code._reprcompare = None
|
|
|
|
def teardown_module(mod):
|
|
py.code._reprcompare = mod._old_reprcompare
|
|
del mod._old_reprcompare
|
|
|
|
|
|
def rewrite(src):
|
|
tree = ast.parse(src)
|
|
rewrite_asserts(tree)
|
|
return tree
|
|
|
|
def getmsg(f, extra_ns=None, must_pass=False):
|
|
"""Rewrite the assertions in f, run it, and get the failure message."""
|
|
src = '\n'.join(py.code.Code(f).source().lines)
|
|
mod = rewrite(src)
|
|
code = compile(mod, "<test>", "exec")
|
|
ns = {}
|
|
if extra_ns is not None:
|
|
ns.update(extra_ns)
|
|
exec code in ns
|
|
func = ns[f.__name__]
|
|
try:
|
|
func()
|
|
except AssertionError:
|
|
if must_pass:
|
|
pytest.fail("shouldn't have raised")
|
|
s = str(sys.exc_info()[1])
|
|
if not s.startswith("assert"):
|
|
return "AssertionError: " + s
|
|
return s
|
|
else:
|
|
if not must_pass:
|
|
pytest.fail("function didn't raise at all")
|
|
|
|
|
|
class TestAssertionRewrite:
|
|
|
|
def test_place_initial_imports(self):
|
|
s = """'Doc string'"""
|
|
m = rewrite(s)
|
|
assert isinstance(m.body[0], ast.Expr)
|
|
assert isinstance(m.body[0].value, ast.Str)
|
|
for imp in m.body[1:]:
|
|
assert isinstance(imp, ast.Import)
|
|
s = """from __future__ import with_statement"""
|
|
m = rewrite(s)
|
|
assert isinstance(m.body[0], ast.ImportFrom)
|
|
for imp in m.body[1:]:
|
|
assert isinstance(imp, ast.Import)
|
|
s = """'doc string'\nfrom __future__ import with_statement"""
|
|
m = rewrite(s)
|
|
assert isinstance(m.body[0], ast.Expr)
|
|
assert isinstance(m.body[0].value, ast.Str)
|
|
assert isinstance(m.body[1], ast.ImportFrom)
|
|
for imp in m.body[2:]:
|
|
assert isinstance(imp, ast.Import)
|
|
|
|
def test_name(self):
|
|
def f():
|
|
assert False
|
|
assert getmsg(f) == "assert False"
|
|
def f():
|
|
f = False
|
|
assert f
|
|
assert getmsg(f) == "assert False"
|
|
def f():
|
|
assert a_global
|
|
assert getmsg(f, {"a_global" : False}) == "assert a_global"
|
|
|
|
def test_assert_already_has_message(self):
|
|
def f():
|
|
assert False, "something bad!"
|
|
assert getmsg(f) == "AssertionError: something bad!"
|
|
|
|
def test_boolop(self):
|
|
def f():
|
|
f = g = False
|
|
assert f and g
|
|
assert getmsg(f) == "assert (False)"
|
|
def f():
|
|
f = True
|
|
g = False
|
|
assert f and g
|
|
assert getmsg(f) == "assert (True and False)"
|
|
def f():
|
|
f = False
|
|
g = True
|
|
assert f and g
|
|
assert getmsg(f) == "assert (False)"
|
|
def f():
|
|
f = g = False
|
|
assert f or g
|
|
assert getmsg(f) == "assert (False or False)"
|
|
def f():
|
|
f = True
|
|
g = False
|
|
assert f or g
|
|
getmsg(f, must_pass=True)
|
|
|
|
def test_short_circut_evaluation(self):
|
|
pytest.xfail("complicated fix; I'm not sure if it's important")
|
|
def f():
|
|
assert True or explode
|
|
getmsg(f, must_pass=True)
|
|
|
|
def test_unary_op(self):
|
|
def f():
|
|
x = True
|
|
assert not x
|
|
assert getmsg(f) == "assert not True"
|
|
def f():
|
|
x = 0
|
|
assert ~x + 1
|
|
assert getmsg(f) == "assert (~0 + 1)"
|
|
def f():
|
|
x = 3
|
|
assert -x + x
|
|
assert getmsg(f) == "assert (-3 + 3)"
|
|
def f():
|
|
x = 0
|
|
assert +x + x
|
|
assert getmsg(f) == "assert (+0 + 0)"
|
|
|
|
def test_binary_op(self):
|
|
def f():
|
|
x = 1
|
|
y = -1
|
|
assert x + y
|
|
assert getmsg(f) == "assert (1 + -1)"
|
|
|
|
def test_call(self):
|
|
def g(a=42, *args, **kwargs):
|
|
return False
|
|
ns = {"g" : g}
|
|
def f():
|
|
assert g()
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = g()"""
|
|
def f():
|
|
assert g(1)
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = g(1)"""
|
|
def f():
|
|
assert g(1, 2)
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = g(1, 2)"""
|
|
def f():
|
|
assert g(1, g=42)
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = g(1, g=42)"""
|
|
def f():
|
|
assert g(1, 3, g=23)
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = g(1, 3, g=23)"""
|
|
|
|
def test_attribute(self):
|
|
class X(object):
|
|
g = 3
|
|
ns = {"X" : X, "x" : X()}
|
|
def f():
|
|
assert not x.g
|
|
assert getmsg(f, ns) == """assert not 3
|
|
+ where 3 = x.g"""
|
|
def f():
|
|
x.a = False
|
|
assert x.a
|
|
assert getmsg(f, ns) == """assert False
|
|
+ where False = x.a"""
|
|
|
|
def test_comparisons(self):
|
|
def f():
|
|
a, b = range(2)
|
|
assert b < a
|
|
assert getmsg(f) == """assert 1 < 0"""
|
|
def f():
|
|
a, b, c = range(3)
|
|
assert a > b > c
|
|
assert getmsg(f) == """assert 0 > 1"""
|
|
def f():
|
|
a, b, c = range(3)
|
|
assert a < b > c
|
|
assert getmsg(f) == """assert 1 > 2"""
|
|
def f():
|
|
a, b, c = range(3)
|
|
assert a < b <= c
|
|
getmsg(f, must_pass=True)
|
|
def f():
|
|
a, b, c = range(3)
|
|
assert a < b
|
|
assert b < c
|
|
getmsg(f, must_pass=True)
|
|
|
|
def test_len(self):
|
|
def f():
|
|
l = range(10)
|
|
assert len(l) == 11
|
|
assert getmsg(f).startswith("""assert 10 == 11
|
|
+ where 10 = len([""")
|
|
|
|
def test_custom_reprcompare(self, monkeypatch):
|
|
def my_reprcompare(op, left, right):
|
|
return "42"
|
|
monkeypatch.setattr(py.code, "_reprcompare", my_reprcompare)
|
|
def f():
|
|
assert 42 < 3
|
|
assert getmsg(f) == "assert 42"
|
|
def my_reprcompare(op, left, right):
|
|
return "%s %s %s" % (left, op, right)
|
|
monkeypatch.setattr(py.code, "_reprcompare", my_reprcompare)
|
|
def f():
|
|
assert 1 < 3 < 5 <= 4 < 7
|
|
assert getmsg(f) == "assert 5 <= 4"
|