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from typing import Optional |
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3
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import pytest |
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4
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5
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from lagom import Container, Singleton, ExplicitContainer |
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6
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from lagom.exceptions import InvalidDependencyDefinition, DependencyNotDefined |
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7
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8
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9
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class SomethingToBuild: |
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pass |
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11
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12
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class SomethingBiggerToBuild: |
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def __init__(self, inner: SomethingToBuild): |
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pass |
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18
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def test_dependencies_must_be_explicitly_defined(explicit_container: Container): |
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with pytest.raises(DependencyNotDefined) as e_info: |
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explicit_container.resolve(SomethingToBuild) |
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assert ( |
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str(e_info.value) |
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== "SomethingToBuild has not been defined. In an explict container all dependencies must be defined" |
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) |
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26
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28
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def test_the_error_suppression_flag_is_honoured(explicit_container: Container): |
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assert explicit_container.resolve(SomethingToBuild, suppress_error=True) is None |
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30
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31
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32
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def test_an_can_build_with_basic_lambdas(explicit_container: Container): |
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33
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explicit_container[SomethingToBuild] = lambda: SomethingToBuild() |
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34
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35
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built_object = explicit_container.resolve(SomethingToBuild) |
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36
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assert isinstance(built_object, SomethingToBuild) |
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37
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38
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39
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def test_aliases_arent_valid_as_they_require_reflection(explicit_container: Container): |
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40
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with pytest.raises(InvalidDependencyDefinition) as e_info: |
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explicit_container[SomethingBiggerToBuild] = SomethingBiggerToBuild |
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42
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43
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assert str(e_info.value) == "Aliases are not valid in an explicit container" |
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44
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45
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46
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def test_singletons_with_aliases_arent_valid_as_they_require_reflection( |
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47
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explicit_container: Container, |
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48
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): |
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with pytest.raises(InvalidDependencyDefinition) as e_info: |
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explicit_container[SomethingBiggerToBuild] = Singleton(SomethingBiggerToBuild) |
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51
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52
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assert ( |
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str(e_info.value) |
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== "Aliases are not valid inside singletons in an explicit container" |
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) |
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56
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57
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58
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def test_the_inner_dependencies_dont_have_to_be_defined_in_the_container( |
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59
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explicit_container: Container, |
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60
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): |
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61
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explicit_container[SomethingBiggerToBuild] = lambda: SomethingBiggerToBuild( |
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62
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SomethingToBuild() |
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63
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) |
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64
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65
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built_object = explicit_container.resolve(SomethingBiggerToBuild) |
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66
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assert isinstance(built_object, SomethingBiggerToBuild) |
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67
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68
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# We still can't build the inner object directly |
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69
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assert explicit_container.resolve(SomethingToBuild, suppress_error=True) is None |
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70
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71
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72
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def test_optional_deps_can_be_injected_if_they_can_be_built( |
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73
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explicit_container: Container, |
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74
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): |
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75
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explicit_container[SomethingToBuild] = lambda: SomethingToBuild() |
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76
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77
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built_object = explicit_container.resolve(Optional[SomethingToBuild]) # type: ignore |
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78
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assert isinstance(built_object, SomethingToBuild) |
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79
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80
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81
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def test_the_clone_of_an_explicit_container_is_also_an_explicit_container( |
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82
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explicit_container: Container, |
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83
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): |
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84
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clone = explicit_container.clone() |
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85
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assert isinstance(clone, ExplicitContainer) |
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86
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meadsteve /
lagom
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