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import pytest
@pytest.fixture
def graph_strategy(target):
from labgrid.strategy import GraphStrategy
class TestStrategy(GraphStrategy):
def state_Root(self):
pass
@GraphStrategy.depends('Root')
def state_A1(self):
pass
@GraphStrategy.depends('Root')
def state_A2(self):
pass
@GraphStrategy.depends('A1', 'A2')
def state_B(self):
pass
@GraphStrategy.depends('B')
def state_C1(self):
pass
@GraphStrategy.depends('B')
def state_C2(self):
pass
@GraphStrategy.depends('C1', 'C2')
def state_D(self):
pass
return TestStrategy(target, 'strategy')
# api tests ###################################################################
@pytest.mark.dependency
def test_fixture(graph_strategy, target):
# test root state
assert graph_strategy.root_state == 'Root'
# test path
assert graph_strategy.path == []
# test state discovering
state_names = sorted(list(graph_strategy.states.keys()))
expected_state_names = ['A1', 'A2', 'B', 'C1', 'C2', 'D', 'Root']
assert state_names == expected_state_names
@pytest.mark.dependency(depends=['test_fixture'])
def test_strategy_without_states(target):
from labgrid.strategy import GraphStrategy, InvalidGraphStrategyError
class TestStrategy(GraphStrategy):
pass
with pytest.raises(InvalidGraphStrategyError) as e:
TestStrategy(target, 'strategy')
assert e.value.msg == 'GraphStrategies without states are invalid'
@pytest.mark.dependency(depends=['test_fixture'])
def test_strategy_without_root_state(target):
from labgrid.strategy import GraphStrategy, InvalidGraphStrategyError
class TestStrategy(GraphStrategy):
@GraphStrategy.depends('B')
def state_A(self):
pass
@GraphStrategy.depends('A')
def state_B(self):
pass
with pytest.raises(InvalidGraphStrategyError) as e:
TestStrategy(target, 'strategy')
assert e.value.msg == 'GraphStrategies without root state are invalid'
@pytest.mark.dependency(depends=['test_fixture'])
def test_multiple_root_states(target):
from labgrid.strategy import GraphStrategy, InvalidGraphStrategyError
class TestStrategy(GraphStrategy):
def state_Root(self):
pass
def state_Root2(self):
pass
with pytest.raises(InvalidGraphStrategyError) as e:
TestStrategy(target, 'strategy')
assert e.value.msg.startswith("Only one root state supported.")
@pytest.mark.dependency(depends=['test_fixture'])
def test_unknown_dependencies(target):
from labgrid.strategy import GraphStrategy, InvalidGraphStrategyError
class TestStrategy(GraphStrategy):
def state_Root(self):
pass
@GraphStrategy.depends('Root')
def state_A(self):
pass
@GraphStrategy.depends('Root', 'A', 'C')
def state_B(self):
pass
with pytest.raises(InvalidGraphStrategyError) as e:
TestStrategy(target, 'strategy')
assert e.value.msg.startswith("B: State 'C' is unknown")
@pytest.mark.dependency(depends=['test_fixture'])
def test_strategy_with_uncallable_states(target):
from labgrid.strategy import GraphStrategy, InvalidGraphStrategyError
class TestStrategy(GraphStrategy):
state_foo = 1
def state_Root(self):
pass
with pytest.raises(InvalidGraphStrategyError) as e:
TestStrategy(target, 'strategy')
assert e.value.msg.startswith(
"GraphStrategy state 'state_foo' is not callable")
@pytest.mark.dependency(name='api-works',
depends=[
'test_fixture',
'test_strategy_without_states',
'test_strategy_without_root_state',
'test_unknown_dependencies',
'test_strategy_with_uncallable_states',
])
def test_api_works():
pass
# functional tests ############################################################
@pytest.mark.dependency(depends=['api-works'])
def test_graphviz_graph(graph_strategy):
pytest.importorskip("graphviz")
graph_strategy.graph
graph_strategy.graph # trigger the caching branch in the graph code
graph_strategy.path = ['Root', 'A1', 'B'] # fake a post transition graph
graph_strategy.graph
@pytest.mark.dependency(depends=['api-works'])
def test_transition(graph_strategy):
assert graph_strategy.transition('B') == ['Root', 'A1', 'B']
assert graph_strategy.path == ['Root', 'A1', 'B']
assert graph_strategy.transition('B') == []
assert graph_strategy.path == ['Root', 'A1', 'B']
@pytest.mark.dependency(depends=['api-works', 'test_transition'])
def test_transition_to_unknown_state(graph_strategy):
from labgrid.strategy import GraphStrategyRuntimeError
with pytest.raises(GraphStrategyRuntimeError) as e:
graph_strategy.transition('G')
assert e.value.msg.startswith("Unknown state 'G'.")
@pytest.mark.dependency(depends=['api-works', 'test_transition'])
def test_interleaved_transitions(target):
from labgrid.strategy import GraphStrategy, GraphStrategyRuntimeError
class TestStrategy(GraphStrategy):
def state_Root(self):
pass
@GraphStrategy.depends('Root')
def state_A(self):
self.transition('B')
@GraphStrategy.depends('Root')
def state_B(self):
self.transition('A')
strategy = TestStrategy(target, 'strategy')
with pytest.raises(GraphStrategyRuntimeError) as e:
strategy.transition('A')
assert e.value.msg == 'Another transition is already running'
@pytest.mark.dependency(depends=['api-works', 'test_transition'])
def test_transition_via(graph_strategy):
assert graph_strategy.transition('D', via=['A2']) == ['Root', 'A2', 'B', 'C1', 'D']
assert graph_strategy.path == ['Root', 'A2', 'B', 'C1', 'D']
graph_strategy.invalidate()
assert graph_strategy.transition('D:A2') == ['Root', 'A2', 'B', 'C1', 'D']
assert graph_strategy.path == ['Root', 'A2', 'B', 'C1', 'D']
assert graph_strategy.transition('D:C2,A2') == ['Root', 'A2', 'B', 'C2', 'D']
assert graph_strategy.path == ['Root', 'A2', 'B', 'C2', 'D']
@pytest.mark.dependency(depends=['api-works',
'test_transition',
'test_transition_via'])
def test_incremental_transition(graph_strategy):
assert graph_strategy.transition('B') == ['Root', 'A1', 'B']
assert graph_strategy.transition('D') == ['C1', 'D']
graph_strategy.invalidate()
assert graph_strategy.transition('B', via=['A2']) == ['Root', 'A2', 'B']
assert graph_strategy.transition('D') == ['Root', 'A1', 'B', 'C1', 'D']
@pytest.mark.dependency(depends=['api-works', 'test_transition'])
def test_transition_error(target):
from labgrid.strategy import GraphStrategy
class TestStrategy(GraphStrategy):
def state_Root(self):
pass
@GraphStrategy.depends('Root')
def state_A(self):
pass
@GraphStrategy.depends('A')
def state_B(self):
raise Exception
strategy = TestStrategy(target, 'strategy')
strategy.transition('A')
assert strategy.path == ['Root', 'A']
with pytest.raises(Exception):
strategy.transition('B')
with pytest.raises(Exception):
strategy.transition('B', via='B')
assert strategy.path == []
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