"""Tests for flow.core.errors."""

from flow.core.errors import ConfigError, ExecutionError, FlowError, PlanConflict


def test_flow_error_is_exception():
    assert issubclass(FlowError, Exception)


def test_config_error_is_flow_error():
    assert issubclass(ConfigError, FlowError)


def test_plan_conflict_carries_conflicts():
    err = PlanConflict("2 conflicts", ["a exists", "b exists"])
    assert str(err) == "2 conflicts"
    assert err.conflicts == ["a exists", "b exists"]


def test_execution_error_is_flow_error():
    assert issubclass(ExecutionError, FlowError)