def test_watch_modules(self, tmpdir, monkeypatch):
mod1 = tmpdir.join("module1.py").ensure(file=True)
mod2 = tmpdir.join("module2.py").ensure(file=True)
monkeypatch.syspath_prepend(str(tmpdir))
iterator = watch_for_changes(modules=["module1", "module2"],
period=0.1)
# Initial iteration hits all known modules
paths, mods = next(iterator)
assert not paths
assert set(mods) == {"module1", "module2"}
# Later iterations only yield modules that are new or changed
timer = threading.Timer(0.15, lambda: mod1.setmtime())
timer.start()
paths, mods = next(iterator)
assert not paths
assert set(mods) == {"module1"}
# Deleting some original modules causes no errors
mod1.remove()
timer = threading.Timer(0.15, mod2.setmtime)
timer.start()
paths, mods = next(iterator)
assert set(mods) == {"module2"}
# If those modules are readded, next iteration picks them up
mod1.ensure(file=True)
mod2.setmtime()
paths, mods = next(iterator)
assert set(mods) == {"module1", "module2"}
def test_errors_path_does_not_exist(self, tmpdir):
missing = str(tmpdir.join("not-real"))
with pytest.raises(TerminalError) as exc:
for _, _ in watch_for_changes(paths=[missing]):
assert False, "Should never get here"
assert repr(missing) in str(exc.value)
def test_watch_paths(self, tmpdir):
dir_path = str(tmpdir.join("dir").mkdir())
path1 = str(tmpdir.join("test1.py").ensure(file=True))
path2 = str(tmpdir.join("test2.py").ensure(file=True))
path3 = os.path.join(dir_path, "test3.py")
path4 = os.path.join(dir_path, "test4.something")
iterator = watch_for_changes(paths=[dir_path, path1, path2],
period=0.1)
# Initial iteration hits all known paths
paths, mods = next(iterator)
assert not mods
assert set(paths) == {path1, path2}
# Later iterations only yield paths that are new or changed
def update():
with open(path3, "wb"):
pass
with open(path4, "wb"):
pass
os.utime(path1)
timer = threading.Timer(0.15, update)
timer.start()
paths, mods = next(iterator)
# path4 isn't included, since only `*.py` files are watched
assert set(paths) == {path1, path3}
# Deleting some original paths causes no errors
os.remove(path1)
os.remove(path3)
timer = threading.Timer(0.15, lambda: os.utime(path2))
timer.start()
paths, mods = next(iterator)
assert set(paths) == {path2}
# If those paths are readded, next iteration picks them up
with open(path1, "wb"):
pass
os.utime(path2)
paths, mods = next(iterator)
assert set(paths) == {path1, path2}
def test_errors_module_does_not_exist(self):
name = "not_a_real_module_name"
with pytest.raises(TerminalError, match=name):
for _, _ in watch_for_changes(modules=[name]):
assert False, "Should never get here"
