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for finding and fixing issues
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from typing import Optional
from lagom import Container
class MySimpleDep:
extra_stuff = "yes"
class MyComplexDep:
def __init__(self, something):
pass
class MyDepWithAnOptional:
success = "yes"
def __init__(self, dep: Optional[MySimpleDep] = None):
self.dep = dep
class MyDepWithAnOptionalThatCantBeBuilt:
def __init__(self, dep: Optional[MyComplexDep] = "weird default"): # type: ignore
def test_missing_optional_dependencies_cause_no_errors(container: Container):
resolved = container.resolve(MyDepWithAnOptionalThatCantBeBuilt)
assert resolved.success == "yes"
def test_defaults_for_optional_types_are_honoured(container: Container):
assert resolved.dep == "weird default"
def test_optional_dependencies_are_understood_and_injected(container: Container):
resolved = container.resolve(MyDepWithAnOptional)
assert resolved.dep.extra_stuff == "yes" # type: ignore
def test_we_can_ask_for_optional_things_that_cant_be_constructed(container: Container):
assert container.resolve(Optional[MyComplexDep]) is None # type: ignore
meadsteve /
lagom
