def test_compute_clear(self):
def test_function():
self.is_called = True
return 42
lazy_constant = LazyConstant(test_function)
assert_eq(42, lazy_constant.compute())
assert self.is_called, 'test_function has not been called'
self.is_called = False
assert_eq(42, lazy_constant.compute())
assert self.is_called, 'test_function has not been called'
def test_not_compute(self):
lazy_constant = ThreadLocalLazyConstant(lambda: not_computed)
assert_is(None, lazy_constant.compute())
assert_is(None, lazy_constant.get_value())
