def test_add_dependency_group_to_resource():
foo = Library('foo', '')
a1 = Resource(foo, 'a1.js')
b1 = Resource(foo, 'b1.js', depends=[a1])
c1 = Resource(foo, 'c1.js', depends=[b1])
assert a1.depends == set([])
assert a1.resources == set([a1])
assert b1.depends == set([a1])
assert b1.resources == set([a1, b1])
assert c1.depends == set([b1])
assert c1.resources == set([a1, b1, c1])
a2 = Resource(foo, 'a2.js')
a3 = Group([a1, a2])
b1.add_dependency(a3)
assert b1.depends == set([a1, a3])
assert b1.resources == set([a1, a2, b1])
assert c1.depends == set([b1])
assert c1.resources == set([a1, a2, b1, c1])
# Adding it twice does not change anything.
b1.add_dependency(a3)
assert b1.depends == set([a1, a3])
assert b1.resources == set([a1, a2, b1])
assert c1.depends == set([b1])
assert c1.resources == set([a1, a2, b1, c1])
def test_cannot_add_dependency_loop():
foo = Library('foo', '')
a1 = Resource(foo, 'a1.js')
b1 = Resource(foo, 'b1.js', depends=[a1])
with pytest.raises(ValueError):
a1.add_dependency(b1)