def test_services_dependency_common2(self):
# given
service_a = CoreService()
service_a.name = "a"
service_b = CoreService()
service_b.name = "b"
service_c = CoreService()
service_c.name = "c"
service_d = CoreService()
service_d.name = "d"
service_a.dependencies = (service_b.name,)
service_b.dependencies = (service_c.name, service_d.name)
service_c.dependencies = (service_d.name,)
services = [service_a, service_b, service_c, service_d]
expected = {service_a.name, service_b.name, service_c.name, service_d.name}
# when
permutations = itertools.permutations(services)
for permutation in permutations:
permutation = list(permutation)
results = ServiceDependencies(permutation).boot_order()
# then
for result in results:
assert len(result) == 4
result_set = {x.name for x in result}
a_index = result.index(service_a)
b_index = result.index(service_b)
c_index = result.index(service_c)
d_index = result.index(service_d)
assert b_index < a_index
assert c_index < b_index
assert d_index < b_index
assert d_index < c_index
assert expected == result_set
def test_services_dependencies_cycle(self):
# given
service_d = ServiceD()
service_d.dependencies = ("C", )
services = [ServiceA, ServiceB, ServiceC, service_d, ServiceF]
# when, then
with pytest.raises(ValueError):
ServiceDependencies(services).boot_paths()
def test_services_dependencies(self):
# given
services = [ServiceA, ServiceB, ServiceC, ServiceD, ServiceF]
# when
boot_paths = ServiceDependencies(services).boot_paths()
# then
assert len(boot_paths) == 2
def test_services_dependencies_not_present(self):
# given
services = [
ServiceA, ServiceB, ServiceC, ServiceD, ServiceF,
ServiceBadDependency
]
# when, then
with pytest.raises(ValueError):
ServiceDependencies(services).boot_paths()
def test_services_dependency(self):
# given
service_a = CoreService()
service_a.name = "a"
service_b = CoreService()
service_b.name = "b"
service_c = CoreService()
service_c.name = "c"
service_d = CoreService()
service_d.name = "d"
service_e = CoreService()
service_e.name = "e"
service_a.dependencies = (service_b.name, )
service_b.dependencies = ()
service_c.dependencies = (service_b.name, service_d.name)
service_d.dependencies = ()
service_e.dependencies = ()
services = [service_a, service_b, service_c, service_d, service_e]
expected1 = {
service_a.name, service_b.name, service_c.name, service_d.name
}
expected2 = [service_e]
# when
permutations = itertools.permutations(services)
for permutation in permutations:
permutation = list(permutation)
results = ServiceDependencies(permutation).boot_order()
# then
for result in results:
result_set = {x.name for x in result}
if len(result) == 4:
a_index = result.index(service_a)
b_index = result.index(service_b)
c_index = result.index(service_c)
d_index = result.index(service_d)
assert b_index < a_index
assert b_index < c_index
assert d_index < c_index
assert result_set == expected1
elif len(result) == 1:
assert expected2 == result
else:
raise ValueError(
f"unexpected result: {results}, perm({permutation})")
def test_services_dependency_cycle(self):
# given
service_a = CoreService()
service_a.name = "a"
service_b = CoreService()
service_b.name = "b"
service_c = CoreService()
service_c.name = "c"
service_a.dependencies = (service_b.name,)
service_b.dependencies = (service_c.name,)
service_c.dependencies = (service_a.name,)
services = [service_a, service_b, service_c]
# when, then
permutations = itertools.permutations(services)
for permutation in permutations:
permutation = list(permutation)
with pytest.raises(ValueError):
ServiceDependencies(permutation).boot_order()