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import pytest
from stator.graph import State, StateGraph
def test_declare():
"""
Tests a basic graph declaration and various kinds of handler
lookups.
"""
class TestGraph(StateGraph):
initial = State(try_interval=3600)
second = State(try_interval=1)
third = State()
initial.transitions_to(second)
second.transitions_to(third)
@classmethod
def handle_initial(cls):
pass
@classmethod
def handle_second(cls):
pass
assert TestGraph.initial_state == TestGraph.initial
assert TestGraph.terminal_states == {TestGraph.third}
assert TestGraph.initial.handler == TestGraph.handle_initial
assert TestGraph.initial.try_interval == 3600
assert TestGraph.second.handler == TestGraph.handle_second
assert TestGraph.second.try_interval == 1
def test_bad_declarations():
"""
Tests that you can't declare an invalid graph.
"""
# More than one initial state
with pytest.raises(ValueError):
class TestGraph2(StateGraph):
initial = State()
initial2 = State()
# No initial states
with pytest.raises(ValueError):
class TestGraph3(StateGraph):
loop = State()
loop2 = State()
loop.transitions_to(loop2)
loop2.transitions_to(loop)
def test_state():
"""
Tests basic values of the State class
"""
class TestGraph(StateGraph):
initial = State()
assert "initial" == TestGraph.initial
assert TestGraph.initial == "initial"
assert TestGraph.initial == TestGraph.initial
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