751 lines
24 KiB
Python
751 lines
24 KiB
Python
import os
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import stat
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import sys
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import zipfile
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import py
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import pytest
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ast = pytest.importorskip("ast")
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if sys.platform.startswith("java"):
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# XXX should be xfail
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pytest.skip("assert rewrite does currently not work on jython")
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import _pytest._code
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from _pytest.assertion import util
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from _pytest.assertion.rewrite import rewrite_asserts, PYTEST_TAG
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from _pytest.main import EXIT_NOTESTSCOLLECTED
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def setup_module(mod):
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mod._old_reprcompare = util._reprcompare
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_pytest._code._reprcompare = None
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def teardown_module(mod):
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util._reprcompare = mod._old_reprcompare
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del mod._old_reprcompare
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def rewrite(src):
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tree = ast.parse(src)
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rewrite_asserts(tree)
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return tree
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def getmsg(f, extra_ns=None, must_pass=False):
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"""Rewrite the assertions in f, run it, and get the failure message."""
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src = '\n'.join(_pytest._code.Code(f).source().lines)
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mod = rewrite(src)
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code = compile(mod, "<test>", "exec")
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ns = {}
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if extra_ns is not None:
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ns.update(extra_ns)
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py.builtin.exec_(code, ns)
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func = ns[f.__name__]
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try:
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func()
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except AssertionError:
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if must_pass:
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pytest.fail("shouldn't have raised")
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s = str(sys.exc_info()[1])
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if not s.startswith("assert"):
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return "AssertionError: " + s
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return s
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else:
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if not must_pass:
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pytest.fail("function didn't raise at all")
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class TestAssertionRewrite:
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def test_place_initial_imports(self):
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s = """'Doc string'\nother = stuff"""
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m = rewrite(s)
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assert isinstance(m.body[0], ast.Expr)
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assert isinstance(m.body[0].value, ast.Str)
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for imp in m.body[1:3]:
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assert isinstance(imp, ast.Import)
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assert imp.lineno == 2
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assert imp.col_offset == 0
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assert isinstance(m.body[3], ast.Assign)
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s = """from __future__ import with_statement\nother_stuff"""
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m = rewrite(s)
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assert isinstance(m.body[0], ast.ImportFrom)
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for imp in m.body[1:3]:
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assert isinstance(imp, ast.Import)
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assert imp.lineno == 2
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assert imp.col_offset == 0
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assert isinstance(m.body[3], ast.Expr)
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s = """'doc string'\nfrom __future__ import with_statement\nother"""
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m = rewrite(s)
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assert isinstance(m.body[0], ast.Expr)
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assert isinstance(m.body[0].value, ast.Str)
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assert isinstance(m.body[1], ast.ImportFrom)
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for imp in m.body[2:4]:
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assert isinstance(imp, ast.Import)
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assert imp.lineno == 3
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assert imp.col_offset == 0
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assert isinstance(m.body[4], ast.Expr)
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s = """from . import relative\nother_stuff"""
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m = rewrite(s)
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for imp in m.body[0:2]:
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assert isinstance(imp, ast.Import)
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assert imp.lineno == 1
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assert imp.col_offset == 0
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assert isinstance(m.body[3], ast.Expr)
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def test_dont_rewrite(self):
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s = """'PYTEST_DONT_REWRITE'\nassert 14"""
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m = rewrite(s)
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assert len(m.body) == 2
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assert isinstance(m.body[0].value, ast.Str)
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assert isinstance(m.body[1], ast.Assert)
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assert m.body[1].msg is None
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def test_name(self):
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def f():
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assert False
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assert getmsg(f) == "assert False"
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def f():
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f = False
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assert f
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assert getmsg(f) == "assert False"
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def f():
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assert a_global # noqa
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assert getmsg(f, {"a_global" : False}) == "assert False"
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def f():
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assert sys == 42
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assert getmsg(f, {"sys" : sys}) == "assert sys == 42"
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def f():
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assert cls == 42 # noqa
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class X(object):
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pass
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assert getmsg(f, {"cls" : X}) == "assert cls == 42"
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def test_assert_already_has_message(self):
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def f():
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assert False, "something bad!"
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assert getmsg(f) == "AssertionError: something bad!\nassert False"
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def test_assertion_message(self, testdir):
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testdir.makepyfile("""
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def test_foo():
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assert 1 == 2, "The failure message"
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError*The failure message*",
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"*assert 1 == 2*",
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])
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def test_assertion_message_multiline(self, testdir):
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testdir.makepyfile("""
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def test_foo():
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assert 1 == 2, "A multiline\\nfailure message"
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError*A multiline*",
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"*failure message*",
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"*assert 1 == 2*",
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])
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def test_assertion_message_tuple(self, testdir):
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testdir.makepyfile("""
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def test_foo():
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assert 1 == 2, (1, 2)
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError*%s*" % repr((1, 2)),
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"*assert 1 == 2*",
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])
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def test_assertion_message_expr(self, testdir):
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testdir.makepyfile("""
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def test_foo():
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assert 1 == 2, 1 + 2
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError*3*",
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"*assert 1 == 2*",
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])
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def test_assertion_message_escape(self, testdir):
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testdir.makepyfile("""
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def test_foo():
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assert 1 == 2, 'To be escaped: %'
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError: To be escaped: %",
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"*assert 1 == 2",
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])
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def test_boolop(self):
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def f():
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f = g = False
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assert f and g
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assert getmsg(f) == "assert (False)"
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def f():
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f = True
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g = False
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assert f and g
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assert getmsg(f) == "assert (True and False)"
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def f():
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f = False
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g = True
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assert f and g
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assert getmsg(f) == "assert (False)"
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def f():
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f = g = False
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assert f or g
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assert getmsg(f) == "assert (False or False)"
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def f():
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f = g = False
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assert not f and not g
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getmsg(f, must_pass=True)
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def x():
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return False
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def f():
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assert x() and x()
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assert getmsg(f, {"x" : x}) == "assert (x())"
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def f():
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assert False or x()
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assert getmsg(f, {"x" : x}) == "assert (False or x())"
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def f():
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assert 1 in {} and 2 in {}
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assert getmsg(f) == "assert (1 in {})"
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def f():
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x = 1
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y = 2
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assert x in {1 : None} and y in {}
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assert getmsg(f) == "assert (1 in {1: None} and 2 in {})"
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def f():
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f = True
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g = False
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assert f or g
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getmsg(f, must_pass=True)
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def f():
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f = g = h = lambda: True
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assert f() and g() and h()
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getmsg(f, must_pass=True)
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def test_short_circut_evaluation(self):
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def f():
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assert True or explode # noqa
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getmsg(f, must_pass=True)
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def f():
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x = 1
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assert x == 1 or x == 2
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getmsg(f, must_pass=True)
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def test_unary_op(self):
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def f():
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x = True
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assert not x
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assert getmsg(f) == "assert not True"
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def f():
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x = 0
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assert ~x + 1
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assert getmsg(f) == "assert (~0 + 1)"
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def f():
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x = 3
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assert -x + x
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assert getmsg(f) == "assert (-3 + 3)"
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def f():
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x = 0
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assert +x + x
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assert getmsg(f) == "assert (+0 + 0)"
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def test_binary_op(self):
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def f():
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x = 1
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y = -1
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assert x + y
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assert getmsg(f) == "assert (1 + -1)"
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def f():
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assert not 5 % 4
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assert getmsg(f) == "assert not (5 % 4)"
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def test_boolop_percent(self):
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def f():
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assert 3 % 2 and False
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assert getmsg(f) == "assert ((3 % 2) and False)"
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def f():
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assert False or 4 % 2
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assert getmsg(f) == "assert (False or (4 % 2))"
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@pytest.mark.skipif("sys.version_info < (3,5)")
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def test_at_operator_issue1290(self, testdir):
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testdir.makepyfile("""
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class Matrix:
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def __init__(self, num):
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self.num = num
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def __matmul__(self, other):
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return self.num * other.num
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def test_multmat_operator():
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assert Matrix(2) @ Matrix(3) == 6""")
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testdir.runpytest().assert_outcomes(passed=1)
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def test_call(self):
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def g(a=42, *args, **kwargs):
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return False
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ns = {"g" : g}
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def f():
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assert g()
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assert getmsg(f, ns) == """assert g()"""
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def f():
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assert g(1)
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assert getmsg(f, ns) == """assert g(1)"""
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def f():
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assert g(1, 2)
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assert getmsg(f, ns) == """assert g(1, 2)"""
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def f():
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assert g(1, g=42)
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assert getmsg(f, ns) == """assert g(1, g=42)"""
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def f():
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assert g(1, 3, g=23)
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assert getmsg(f, ns) == """assert g(1, 3, g=23)"""
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def f():
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seq = [1, 2, 3]
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assert g(*seq)
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assert getmsg(f, ns) == """assert g(*[1, 2, 3])"""
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def f():
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x = "a"
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assert g(**{x : 2})
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assert getmsg(f, ns) == """assert g(**{'a': 2})"""
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def test_attribute(self):
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class X(object):
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g = 3
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ns = {"x" : X}
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def f():
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assert not x.g # noqa
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assert getmsg(f, ns) == """assert not 3
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+ where 3 = x.g"""
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def f():
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x.a = False # noqa
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assert x.a # noqa
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assert getmsg(f, ns) == """assert x.a"""
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def test_comparisons(self):
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def f():
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a, b = range(2)
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assert b < a
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assert getmsg(f) == """assert 1 < 0"""
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def f():
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a, b, c = range(3)
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assert a > b > c
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assert getmsg(f) == """assert 0 > 1"""
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def f():
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a, b, c = range(3)
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assert a < b > c
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assert getmsg(f) == """assert 1 > 2"""
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def f():
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a, b, c = range(3)
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assert a < b <= c
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getmsg(f, must_pass=True)
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def f():
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a, b, c = range(3)
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assert a < b
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assert b < c
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getmsg(f, must_pass=True)
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def test_len(self):
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def f():
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l = list(range(10))
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assert len(l) == 11
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assert getmsg(f).startswith("""assert 10 == 11
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+ where 10 = len([""")
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def test_custom_reprcompare(self, monkeypatch):
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def my_reprcompare(op, left, right):
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return "42"
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monkeypatch.setattr(util, "_reprcompare", my_reprcompare)
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def f():
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assert 42 < 3
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assert getmsg(f) == "assert 42"
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def my_reprcompare(op, left, right):
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return "%s %s %s" % (left, op, right)
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monkeypatch.setattr(util, "_reprcompare", my_reprcompare)
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def f():
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assert 1 < 3 < 5 <= 4 < 7
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assert getmsg(f) == "assert 5 <= 4"
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def test_assert_raising_nonzero_in_comparison(self):
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def f():
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class A(object):
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def __nonzero__(self):
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raise ValueError(42)
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def __lt__(self, other):
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return A()
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def __repr__(self):
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return "<MY42 object>"
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def myany(x):
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return False
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assert myany(A() < 0)
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assert "<MY42 object> < 0" in getmsg(f)
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def test_formatchar(self):
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def f():
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assert "%test" == "test"
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assert getmsg(f).startswith("assert '%test' == 'test'")
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def test_custom_repr(self):
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def f():
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class Foo(object):
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a = 1
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def __repr__(self):
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return "\n{ \n~ \n}"
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f = Foo()
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assert 0 == f.a
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assert r"where 1 = \n{ \n~ \n}.a" in util._format_lines([getmsg(f)])[0]
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class TestRewriteOnImport:
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def test_pycache_is_a_file(self, testdir):
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testdir.tmpdir.join("__pycache__").write("Hello")
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testdir.makepyfile("""
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def test_rewritten():
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assert "@py_builtins" in globals()""")
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assert testdir.runpytest().ret == 0
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def test_pycache_is_readonly(self, testdir):
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cache = testdir.tmpdir.mkdir("__pycache__")
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old_mode = cache.stat().mode
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cache.chmod(old_mode ^ stat.S_IWRITE)
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testdir.makepyfile("""
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def test_rewritten():
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assert "@py_builtins" in globals()""")
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try:
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assert testdir.runpytest().ret == 0
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finally:
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cache.chmod(old_mode)
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def test_zipfile(self, testdir):
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z = testdir.tmpdir.join("myzip.zip")
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z_fn = str(z)
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f = zipfile.ZipFile(z_fn, "w")
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try:
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f.writestr("test_gum/__init__.py", "")
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f.writestr("test_gum/test_lizard.py", "")
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finally:
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f.close()
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z.chmod(256)
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testdir.makepyfile("""
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import sys
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sys.path.append(%r)
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import test_gum.test_lizard""" % (z_fn,))
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assert testdir.runpytest().ret == EXIT_NOTESTSCOLLECTED
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def test_readonly(self, testdir):
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sub = testdir.mkdir("testing")
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sub.join("test_readonly.py").write(
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py.builtin._totext("""
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def test_rewritten():
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assert "@py_builtins" in globals()
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""").encode("utf-8"), "wb")
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old_mode = sub.stat().mode
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sub.chmod(320)
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try:
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assert testdir.runpytest().ret == 0
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finally:
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sub.chmod(old_mode)
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def test_dont_write_bytecode(self, testdir, monkeypatch):
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testdir.makepyfile("""
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import os
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def test_no_bytecode():
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assert "__pycache__" in __cached__
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assert not os.path.exists(__cached__)
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assert not os.path.exists(os.path.dirname(__cached__))""")
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monkeypatch.setenv("PYTHONDONTWRITEBYTECODE", "1")
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assert testdir.runpytest_subprocess().ret == 0
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@pytest.mark.skipif('"__pypy__" in sys.modules')
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def test_pyc_vs_pyo(self, testdir, monkeypatch):
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testdir.makepyfile("""
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import pytest
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def test_optimized():
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"hello"
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assert test_optimized.__doc__ is None"""
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)
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p = py.path.local.make_numbered_dir(prefix="runpytest-", keep=None,
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rootdir=testdir.tmpdir)
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tmp = "--basetemp=%s" % p
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monkeypatch.setenv("PYTHONOPTIMIZE", "2")
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monkeypatch.delenv("PYTHONDONTWRITEBYTECODE", raising=False)
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assert testdir.runpytest_subprocess(tmp).ret == 0
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tagged = "test_pyc_vs_pyo." + PYTEST_TAG
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assert tagged + ".pyo" in os.listdir("__pycache__")
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monkeypatch.undo()
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monkeypatch.delenv("PYTHONDONTWRITEBYTECODE", raising=False)
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assert testdir.runpytest_subprocess(tmp).ret == 1
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assert tagged + ".pyc" in os.listdir("__pycache__")
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def test_package(self, testdir):
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pkg = testdir.tmpdir.join("pkg")
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pkg.mkdir()
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pkg.join("__init__.py").ensure()
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pkg.join("test_blah.py").write("""
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def test_rewritten():
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assert "@py_builtins" in globals()""")
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assert testdir.runpytest().ret == 0
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def test_translate_newlines(self, testdir):
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content = "def test_rewritten():\r\n assert '@py_builtins' in globals()"
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b = content.encode("utf-8")
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testdir.tmpdir.join("test_newlines.py").write(b, "wb")
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assert testdir.runpytest().ret == 0
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@pytest.mark.skipif(sys.version_info < (3,3),
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reason='packages without __init__.py not supported on python 2')
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def test_package_without__init__py(self, testdir):
|
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pkg = testdir.mkdir('a_package_without_init_py')
|
|
pkg.join('module.py').ensure()
|
|
testdir.makepyfile("import a_package_without_init_py.module")
|
|
assert testdir.runpytest().ret == EXIT_NOTESTSCOLLECTED
|
|
|
|
class TestAssertionRewriteHookDetails(object):
|
|
def test_loader_is_package_false_for_module(self, testdir):
|
|
testdir.makepyfile(test_fun="""
|
|
def test_loader():
|
|
assert not __loader__.is_package(__name__)
|
|
""")
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines([
|
|
"* 1 passed*",
|
|
])
|
|
|
|
def test_loader_is_package_true_for_package(self, testdir):
|
|
testdir.makepyfile(test_fun="""
|
|
def test_loader():
|
|
assert not __loader__.is_package(__name__)
|
|
|
|
def test_fun():
|
|
assert __loader__.is_package('fun')
|
|
|
|
def test_missing():
|
|
assert not __loader__.is_package('pytest_not_there')
|
|
""")
|
|
testdir.mkpydir('fun')
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines([
|
|
'* 3 passed*',
|
|
])
|
|
|
|
@pytest.mark.skipif("sys.version_info[0] >= 3")
|
|
@pytest.mark.xfail("hasattr(sys, 'pypy_translation_info')")
|
|
def test_assume_ascii(self, testdir):
|
|
content = "u'\xe2\x99\xa5\x01\xfe'"
|
|
testdir.tmpdir.join("test_encoding.py").write(content, "wb")
|
|
res = testdir.runpytest()
|
|
assert res.ret != 0
|
|
assert "SyntaxError: Non-ASCII character" in res.stdout.str()
|
|
|
|
@pytest.mark.skipif("sys.version_info[0] >= 3")
|
|
def test_detect_coding_cookie(self, testdir):
|
|
testdir.makepyfile(test_cookie="""
|
|
# -*- coding: utf-8 -*-
|
|
u"St\xc3\xa4d"
|
|
def test_rewritten():
|
|
assert "@py_builtins" in globals()""")
|
|
assert testdir.runpytest().ret == 0
|
|
|
|
@pytest.mark.skipif("sys.version_info[0] >= 3")
|
|
def test_detect_coding_cookie_second_line(self, testdir):
|
|
testdir.makepyfile(test_cookie="""
|
|
# -*- coding: utf-8 -*-
|
|
u"St\xc3\xa4d"
|
|
def test_rewritten():
|
|
assert "@py_builtins" in globals()""")
|
|
assert testdir.runpytest().ret == 0
|
|
|
|
@pytest.mark.skipif("sys.version_info[0] >= 3")
|
|
def test_detect_coding_cookie_crlf(self, testdir):
|
|
testdir.makepyfile(test_cookie="""
|
|
# -*- coding: utf-8 -*-
|
|
u"St\xc3\xa4d"
|
|
def test_rewritten():
|
|
assert "@py_builtins" in globals()""")
|
|
assert testdir.runpytest().ret == 0
|
|
|
|
def test_sys_meta_path_munged(self, testdir):
|
|
testdir.makepyfile("""
|
|
def test_meta_path():
|
|
import sys; sys.meta_path = []""")
|
|
assert testdir.runpytest().ret == 0
|
|
|
|
def test_write_pyc(self, testdir, tmpdir, monkeypatch):
|
|
from _pytest.assertion.rewrite import _write_pyc
|
|
from _pytest.assertion import AssertionState
|
|
try:
|
|
import __builtin__ as b
|
|
except ImportError:
|
|
import builtins as b
|
|
config = testdir.parseconfig([])
|
|
state = AssertionState(config, "rewrite")
|
|
source_path = tmpdir.ensure("source.py")
|
|
pycpath = tmpdir.join("pyc").strpath
|
|
assert _write_pyc(state, [1], source_path.stat(), pycpath)
|
|
def open(*args):
|
|
e = IOError()
|
|
e.errno = 10
|
|
raise e
|
|
monkeypatch.setattr(b, "open", open)
|
|
assert not _write_pyc(state, [1], source_path.stat(), pycpath)
|
|
|
|
def test_resources_provider_for_loader(self, testdir):
|
|
"""
|
|
Attempts to load resources from a package should succeed normally,
|
|
even when the AssertionRewriteHook is used to load the modules.
|
|
|
|
See #366 for details.
|
|
"""
|
|
pytest.importorskip("pkg_resources")
|
|
|
|
testdir.mkpydir('testpkg')
|
|
contents = {
|
|
'testpkg/test_pkg': """
|
|
import pkg_resources
|
|
|
|
import pytest
|
|
from _pytest.assertion.rewrite import AssertionRewritingHook
|
|
|
|
def test_load_resource():
|
|
assert isinstance(__loader__, AssertionRewritingHook)
|
|
res = pkg_resources.resource_string(__name__, 'resource.txt')
|
|
res = res.decode('ascii')
|
|
assert res == 'Load me please.'
|
|
""",
|
|
}
|
|
testdir.makepyfile(**contents)
|
|
testdir.maketxtfile(**{'testpkg/resource': "Load me please."})
|
|
|
|
result = testdir.runpytest_subprocess()
|
|
result.assert_outcomes(passed=1)
|
|
|
|
def test_read_pyc(self, tmpdir):
|
|
"""
|
|
Ensure that the `_read_pyc` can properly deal with corrupted pyc files.
|
|
In those circumstances it should just give up instead of generating
|
|
an exception that is propagated to the caller.
|
|
"""
|
|
import py_compile
|
|
from _pytest.assertion.rewrite import _read_pyc
|
|
|
|
source = tmpdir.join('source.py')
|
|
pyc = source + 'c'
|
|
|
|
source.write('def test(): pass')
|
|
py_compile.compile(str(source), str(pyc))
|
|
|
|
contents = pyc.read(mode='rb')
|
|
strip_bytes = 20 # header is around 8 bytes, strip a little more
|
|
assert len(contents) > strip_bytes
|
|
pyc.write(contents[:strip_bytes], mode='wb')
|
|
|
|
assert _read_pyc(source, str(pyc)) is None # no error
|
|
|
|
def test_reload_is_same(self, testdir):
|
|
# A file that will be picked up during collecting.
|
|
testdir.tmpdir.join("file.py").ensure()
|
|
testdir.tmpdir.join("pytest.ini").write(py.std.textwrap.dedent("""
|
|
[pytest]
|
|
python_files = *.py
|
|
"""))
|
|
|
|
testdir.makepyfile(test_fun="""
|
|
import sys
|
|
try:
|
|
from imp import reload
|
|
except ImportError:
|
|
pass
|
|
|
|
def test_loader():
|
|
import file
|
|
assert sys.modules["file"] is reload(file)
|
|
""")
|
|
result = testdir.runpytest('-s')
|
|
result.stdout.fnmatch_lines([
|
|
"* 1 passed*",
|
|
])
|
|
|
|
def test_get_data_support(self, testdir):
|
|
"""Implement optional PEP302 api (#808).
|
|
"""
|
|
path = testdir.mkpydir("foo")
|
|
path.join("test_foo.py").write(_pytest._code.Source("""
|
|
class Test:
|
|
def test_foo(self):
|
|
import pkgutil
|
|
data = pkgutil.get_data('foo.test_foo', 'data.txt')
|
|
assert data == b'Hey'
|
|
"""))
|
|
path.join('data.txt').write('Hey')
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines('*1 passed*')
|
|
|
|
@pytest.mark.parametrize('initial_conftest', [True, False])
|
|
@pytest.mark.parametrize('mode', ['plain', 'rewrite', 'reinterp'])
|
|
def test_conftest_assertion_rewrite(self, testdir, initial_conftest, mode):
|
|
"""Test that conftest files are using assertion rewrite on import.
|
|
(#1619)
|
|
"""
|
|
testdir.tmpdir.join('foo/tests').ensure(dir=1)
|
|
conftest_path = 'conftest.py' if initial_conftest else 'foo/conftest.py'
|
|
contents = {
|
|
conftest_path: """
|
|
import pytest
|
|
@pytest.fixture
|
|
def check_first():
|
|
def check(values, value):
|
|
assert values.pop(0) == value
|
|
return check
|
|
""",
|
|
'foo/tests/test_foo.py': """
|
|
def test(check_first):
|
|
check_first([10, 30], 30)
|
|
"""
|
|
}
|
|
testdir.makepyfile(**contents)
|
|
result = testdir.runpytest_subprocess('--assert=%s' % mode)
|
|
if mode == 'plain':
|
|
expected = 'E AssertionError'
|
|
elif mode == 'rewrite':
|
|
expected = '*assert 10 == 30*'
|
|
elif mode == 'reinterp':
|
|
expected = '*AssertionError:*was re-run*'
|
|
else:
|
|
assert 0
|
|
result.stdout.fnmatch_lines([expected])
|
|
|
|
|
|
def test_issue731(testdir):
|
|
testdir.makepyfile("""
|
|
class LongReprWithBraces(object):
|
|
def __repr__(self):
|
|
return 'LongReprWithBraces({' + ('a' * 80) + '}' + ('a' * 120) + ')'
|
|
|
|
def some_method(self):
|
|
return False
|
|
|
|
def test_long_repr():
|
|
obj = LongReprWithBraces()
|
|
assert obj.some_method()
|
|
""")
|
|
result = testdir.runpytest()
|
|
assert 'unbalanced braces' not in result.stdout.str()
|
|
|
|
|
|
def test_collapse_false_unbalanced_braces():
|
|
util._collapse_false('some text{ False\n{False = some more text\n}')
|