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import pytest |
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from lagom import Container |
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class MySimpleDep: |
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stuff: str |
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def __init__(self, stuff): |
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self.stuff = stuff |
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class MyMoreComplicatedDep: |
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complicated_stuff: str |
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def __init__(self, dep: MySimpleDep): |
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self.stuff = "complicated " + dep.stuff |
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class DepAsAForwardRef: |
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def __init__(self, dep: "SomethingDefinedLater") -> None: |
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pass |
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class SomethingDefinedLater: |
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pass |
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class TypedSelf: |
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def __init__(self: "TypedSelf"): |
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pass |
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@pytest.fixture |
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def container_with_simple_dep(container: Container): |
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container.define(MySimpleDep, lambda: MySimpleDep("Top stuff")) |
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return container |
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def test_works_for_registered_types(container_with_simple_dep): |
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resolved = container_with_simple_dep.resolve(MySimpleDep) |
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assert resolved.stuff == "Top stuff" |
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def test_works_if_every_item_in_the_constructor_can_be_figured_out( |
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container_with_simple_dep, |
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): |
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resolved = container_with_simple_dep.resolve(MyMoreComplicatedDep) |
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assert resolved.stuff == "complicated Top stuff" |
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51
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52
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@pytest.mark.parametrize("dep", [MySimpleDep, MyMoreComplicatedDep]) |
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def test_dependencies_are_built_each_request(container_with_simple_dep: Container, dep): |
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first = container_with_simple_dep.resolve(dep) |
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second = container_with_simple_dep.resolve(dep) |
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assert first is not second |
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def test_forward_refs_are_fine(container: Container): |
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resolved = container.resolve(DepAsAForwardRef) |
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assert isinstance(resolved, DepAsAForwardRef) |
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63
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64
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def test_explicitly_typing_self_doesnt_cause_problems(container: Container): |
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resolved = container.resolve(TypedSelf) |
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assert isinstance(resolved, TypedSelf) |
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meadsteve /
lagom
