def test_find_not_on_PATH_relative(self):
"""
Executable.find() fails if the executable is not under $PATH.
"""
filename = self._write_executable("script")
os.environ["PATH"] = "/not/the/dir/we/want"
with self.assertRaises(ExecutableNotFoundError):
Executable.find("script")
def test_find_does_not_exist(self):
"""
Executable.find() fails if the executable does not exist,
even if an absolute filename is provided (an absolute filename
makes $PATH irrelevant).
"""
filename = self._resolve_executable("does-not-exist")
with self.assertRaises(ExecutableNotFoundError):
Executable.find(filename)
def test_find_no_envvars_PATH_not_on_os_environs_PATH_relative(self):
"""
Executable.find() fails if the filename is relative and
the executable is not found under $PATH in envvars nor in
os.environ.
"""
filename = self._write_executable("script")
os.environ["PATH"] = "/not/the/dir/we/want"
envvars = {
"SPAM": "eggs",
}
with self.assertRaises(ExecutableNotFoundError):
Executable.find("script", envvars)
def test_find_not_on_envvars_PATH(self):
"""
Executable.find() fails for a relative filename if envvars
is provided and has $PATH set, but the executable is not
located under it, even if it *is* findable under
os.environ["PATH"].
"""
filename = self._write_executable("script")
os.environ["PATH"] = os.path.dirname(filename)
envvars = {
"PATH": "/not/the/dir/we/want",
"SPAM": "eggs",
}
with self.assertRaises(ExecutableNotFoundError):
Executable.find("script", envvars)
def test_find_not_on_PATH_absolute(self):
"""
Executable.find() succeeds if unfindable but absolute filename.
"""
filename = self._write_executable("script")
os.environ["PATH"] = "/dir/does/not/exist"
exe = Executable.find(filename)
self.assertEqual(exe.filename, filename)
def test_find_on_os_environs_PATH(self):
"""
Executable.find() succeeds if the executable exists and
is located under os.environ["PATH"]
"""
filename = self._write_executable("script")
os.environ["PATH"] = os.path.dirname(filename)
exe = Executable.find("script")
self.assertEqual(exe.filename, filename)
self.assertIsNone(exe.envvars)
def test_find_on_envvars_PATH(self):
"""
Executable.find() succeeds if envvars has $PATH set and the
executable is locatd under it. os.environ["PATH"] is ignored.
"""
filename = self._write_executable("script")
os.environ["PATH"] = "/not/the/dir/we/want"
envvars = {
"PATH": self.dirname,
"SPAM": "eggs",
}
exe = Executable.find("script", envvars)
self.assertEqual(exe.filename, filename)
self.assertEqual(exe.envvars, envvars)
def test_find_no_envvars_PATH_not_on_os_environs_PATH_absolute(self):
"""
Executable.find() succeeds if the filename is absolute, even
if envars is provided without $PATH and the executable is not
located under os.environ["PATH"].
"""
filename = self._write_executable("script")
os.environ["PATH"] = "/not/the/dir/we/want"
envvars = {
"SPAM": "eggs",
}
exe = Executable.find(filename, envvars)
self.assertEqual(exe.filename, filename)
self.assertEqual(exe.envvars, envvars)
def test_find_no_envvars_PATH_but_on_os_environs_PATH(self):
"""
Executable.find() succeeds if the provided envvars does not
have $PATH set, but os.environ does and the executable is
located under it.
"""
filename = self._write_executable("script")
os.environ["PATH"] = os.path.dirname(filename)
envvars = {
"SPAM": "eggs",
}
exe = Executable.find("script", envvars)
self.assertEqual(exe.filename, filename)
self.assertEqual(exe.envvars, envvars)