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1
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import pytest |
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2
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3
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from lagom import Container, compose |
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4
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5
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6
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class A: |
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7
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def __init__(self, something: str): |
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8
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pass |
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9
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10
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11
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class B: |
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12
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def __init__(self, something: str): |
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13
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pass |
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14
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15
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16
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class C: |
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def __init__(self, something: str): |
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18
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pass |
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19
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20
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21
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container_a = Container() |
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22
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container_a[A] = lambda: A("hello") |
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23
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24
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container_b = Container() |
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25
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container_b[B] = lambda: B("world") |
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26
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27
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container_c = Container() |
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28
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container_c[C] = lambda: C("!!!!") |
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29
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30
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31
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def test_two_containers_can_be_composed_together_and_all_dependencies_resolved(): |
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32
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composed_container = compose(container_a, container_b) |
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33
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34
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assert composed_container[A] |
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35
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assert composed_container[B] |
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36
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37
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38
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def test_the_composed_container_can_list_all_defined_deps(): |
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39
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composed_container = compose(container_a, container_b) |
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40
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41
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assert A in composed_container.defined_types |
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42
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assert B in composed_container.defined_types |
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43
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44
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45
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def test_composed_container_definitions_cannot_overlap(): |
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46
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with pytest.raises(ValueError): |
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47
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compose(container_a, container_a) |
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48
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49
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50
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def test_the_result_of_a_composition_can_be_composed(): |
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51
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composed_container = compose(container_a, container_b) |
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52
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next_composed_container = compose(composed_container, container_c) |
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53
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54
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assert A in next_composed_container.defined_types |
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55
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assert B in next_composed_container.defined_types |
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56
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assert C in next_composed_container.defined_types |
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57
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assert C not in composed_container.defined_types |
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58
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meadsteve /
lagom
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