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test: add unit tests for tools.file_import and tools.get_experiment

Signed-off-by: Etienne Wodey <wodey@iqo.uni-hannover.de>
This commit is contained in:
Etienne Wodey 2021-02-11 22:08:07 +01:00 committed by Sébastien Bourdeauducq
parent d33a206f04
commit 2ca9b64ba1

118
artiq/test/test_tools.py Normal file
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from contextlib import contextmanager
import unittest
from pathlib import Path
import tempfile
from artiq import tools
# Helper to create temporary modules
# Very simplified version of CPython's
# Lib/test/test_importlib/util.py:create_modules
@contextmanager
def create_modules(*names):
mapping = {}
with tempfile.TemporaryDirectory() as temp_dir:
mapping[".root"] = Path(temp_dir)
for name in names:
file_path = Path(temp_dir) / f"{name}.py"
with file_path.open("w") as fp:
print(f"_MODULE_NAME = {name!r}", file=fp)
mapping[name] = file_path
yield mapping
MODNAME = "modname"
class TestFileImport(unittest.TestCase):
def test_import_and_prefix_is_present(self):
prefix = "prefix_"
with create_modules(MODNAME) as mods:
mod = tools.file_import(str(mods[MODNAME]), prefix=prefix)
self.assertEqual(prefix + MODNAME, mod.__name__)
def test_can_import_from_same_level(self):
m1_name, m2_name = "mod1", "mod2"
with create_modules(m1_name, m2_name) as mods:
with mods[m2_name].open("a") as fp:
print(f"from {m1_name} import _MODULE_NAME as _M1_NAME", file=fp)
mod1 = tools.file_import(str(mods[m1_name]))
mod2 = tools.file_import(str(mods[m2_name]))
self.assertEqual(mod2._M1_NAME, mod1._MODULE_NAME)
class TestGetExperiment(unittest.TestCase):
def test_fail_no_experiments(self):
with create_modules(MODNAME) as mods:
mod = tools.file_import(str(mods[MODNAME]))
with self.assertRaises(ValueError):
tools.get_experiment(mod)
def test_fail_hidden_experiment(self):
with create_modules(MODNAME) as mods:
with mods[MODNAME].open("a") as fp:
print(
"""
from artiq.experiment import *
class _Exp1(EnvExperiment):
pass
""",
file=fp,
)
mod = tools.file_import(str(mods[MODNAME]))
with self.assertRaises(ValueError):
tools.get_experiment(mod)
def test_multiple_experiments(self):
with create_modules(MODNAME) as mods:
with mods[MODNAME].open("a") as fp:
print(
"""
from artiq.experiment import *
class Exp1(EnvExperiment):
pass
class Exp2(EnvExperiment):
pass
""",
file=fp,
)
mod = tools.file_import(str(mods[MODNAME]))
# by class name
self.assertIs(mod.Exp1, tools.get_experiment(mod, "Exp1"))
self.assertIs(mod.Exp2, tools.get_experiment(mod, "Exp2"))
# by elimination should fail
with self.assertRaises(ValueError):
tools.get_experiment(mod)
def test_single_experiment(self):
with create_modules(MODNAME) as mods:
with mods[MODNAME].open("a") as fp:
print(
"""
from artiq.experiment import *
class Exp1(EnvExperiment):
pass
""",
file=fp,
)
mod = tools.file_import(str(mods[MODNAME]))
# by class name
self.assertIs(mod.Exp1, tools.get_experiment(mod, "Exp1"))
# by elimination
self.assertIs(mod.Exp1, tools.get_experiment(mod))