Nguyen Minh Phuc
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Complete working build of the system learn-python/ teaches. 164 tests, mypy --strict clean, domain coverage 99%.
43 lines
1.6 KiB
Python
43 lines
1.6 KiB
Python
"""Unit tests for the instance state machine."""
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import pytest
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from svcforge_core.domain.states import LEGAL, IllegalTransition, InstanceState, transition
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def test_requested_to_provisioning_is_legal() -> None:
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assert transition(InstanceState.REQUESTED, InstanceState.PROVISIONING) is InstanceState.PROVISIONING
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def test_deleted_to_ready_raises() -> None:
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with pytest.raises(IllegalTransition):
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transition(InstanceState.DELETED, InstanceState.READY)
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def test_failed_to_provisioning_is_legal_retry() -> None:
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assert transition(InstanceState.FAILED, InstanceState.PROVISIONING) is InstanceState.PROVISIONING
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@pytest.mark.parametrize("state", list(InstanceState))
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def test_every_state_has_a_legal_entry(state: InstanceState) -> None:
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"""A new state with no LEGAL entry must fail the suite, not KeyError at runtime."""
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assert state in LEGAL
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assert isinstance(LEGAL[state], frozenset)
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@pytest.mark.parametrize("state", list(InstanceState))
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def test_every_legal_target_is_an_instance_state(state: InstanceState) -> None:
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for target in LEGAL[state]:
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assert isinstance(target, InstanceState)
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def test_deleted_is_terminal_with_an_empty_frozenset() -> None:
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assert LEGAL[InstanceState.DELETED] == frozenset()
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def test_strenum_compares_equal_to_its_value() -> None:
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# mypy calls this non-overlapping by declared type. That is exactly what is being
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# tested: StrEnum members ARE their values at runtime, which is why psycopg can
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# adapt them straight to text and model_validate round-trips them for free.
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assert (InstanceState.READY == "ready") is True # type: ignore[comparison-overlap]
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