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from abc import ABC, abstractmethod |
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3
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import pytest |
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5
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from lagom import Container, Alias |
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6
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from lagom.exceptions import UnresolvableType |
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7
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8
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9
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class MySimpleAbc(ABC): |
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stuff: str = "empty" |
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12
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@abstractmethod |
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def bloop(self): |
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pass |
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class MySimpleDep(MySimpleAbc): |
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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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23
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def bloop(self): |
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return "beep" |
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class MyMoreComplicatedDep: |
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complicated_stuff: str |
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def __init__(self, dep: MySimpleAbc): |
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self.stuff = dep.stuff |
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34
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class AnotherAbc(ABC): |
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stuff: str = "empty" |
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37
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38
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class AnotherConcrete(AnotherAbc): |
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stuff = "full" |
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40
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41
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42
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@pytest.fixture |
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def container_with_abc(container: Container): |
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container.define(MySimpleAbc, lambda: MySimpleDep("hooray")) # type: ignore |
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return container |
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47
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48
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def test_registered_concrete_class_is_loaded(container_with_abc: Container): |
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resolved = container_with_abc.resolve(MySimpleAbc) # type: ignore |
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assert resolved.stuff == "hooray" |
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51
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52
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53
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def test_registered_concrete_class_is_used_for_other_objects( |
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container_with_abc: Container, |
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): |
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resolved = container_with_abc.resolve(MyMoreComplicatedDep) |
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assert resolved.stuff == "hooray" |
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58
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59
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60
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def test_alias_can_be_defined(container_with_abc: Container): |
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container_with_abc.define(AnotherAbc, Alias(AnotherConcrete)) |
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resolved = container_with_abc.resolve(AnotherAbc) |
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assert resolved.stuff == "full" |
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64
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65
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66
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def test_trying_to_build_an_abc_raises_an_error(container: Container): |
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with pytest.raises(UnresolvableType) as e_info: |
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container.resolve(MySimpleAbc) # type: ignore |
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assert "Unable to construct Abstract type MySimpleAbc" in str(e_info.value) |
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assert "Try defining an alias or a concrete class to construct" in str(e_info.value) |
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71
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meadsteve /
lagom
