def test_outdated_data_simple_dependency(tmp_directory):
""" A -> B
"""
dag = DAG()
fa = Path('a.txt')
fb = Path('b.txt')
ta = PythonCallable(touch_root, File(fa), dag, 'ta')
tb = PythonCallable(touch, File(fb), dag, 'tb')
ta >> tb
ta.render()
tb.render()
assert not ta.product.exists()
assert not tb.product.exists()
assert ta.product._is_outdated()
assert tb.product._is_outdated()
dag.build()
dag._clear_metadata()
# they both exist now
assert ta.product.exists()
assert tb.product.exists()
# and arent outdated...
assert not ta.product._is_outdated()
assert not tb.product._is_outdated()
# let's make b outdated
ta.build(force=True)
dag._clear_metadata()
assert not ta.product._is_outdated()
assert tb.product._is_outdated()
def test_many_upstream(tmp_directory):
""" {A, B} -> C
"""
dag = DAG()
fa = Path('a.txt')
fb = Path('b.txt')
fc = Path('c.txt')
ta = PythonCallable(touch_root, File(fa), dag, 'ta')
tb = PythonCallable(touch_root, File(fb), dag, 'tb')
tc = PythonCallable(touch, File(fc), dag, 'tc')
(ta + tb) >> tc
dag.build()
assert ta.product.exists()
assert tb.product.exists()
assert tc.product.exists()
assert not ta.product._is_outdated()
assert not tb.product._is_outdated()
assert not tc.product._is_outdated()
ta.build(force=True)
dag._clear_metadata()
assert not ta.product._is_outdated()
assert not tb.product._is_outdated()
assert tc.product._is_outdated()
dag.build()
tb.build(force=True)
dag._clear_metadata()
assert not ta.product._is_outdated()
assert not tb.product._is_outdated()
assert tc.product._is_outdated()
