def test_source_stack_integrity():
"""Emitter checks source stack"""
em = EventEmitter(type="test_event")
def cb(ev):
ev._sources.append("x")
em.connect(cb)
try:
em()
except RuntimeError as err:
if str(err) != "Event source-stack mismatch.":
raise
em.disconnect()
def cb2(ev):
ev._sources = []
em.connect(cb2)
try:
em()
except IndexError:
pass
def test_chained_emitters():
"""Chained emitters"""
source = type("Source", (), {})()
em1 = EventEmitter(source=None, type="test_event1")
em2 = EventEmitter(source=source, type="test_event2")
em1.connect(em2)
em1.connect(record_event)
record_event.result = None
ev = em1()
record_event.assert_result(event=ev,
event_class=Event,
source=None,
type="test_event1",
sources=[None])
# sources look different from second emitter, but type is the same.
em1.disconnect(record_event)
em2.connect(record_event)
record_event.result = None
ev = em1()
record_event.assert_result(
event=ev,
event_class=Event,
source=source,
type="test_event1",
sources=[None, source],
)
def test_disconnect():
"""Emitter disconnection"""
em = EventEmitter(type="test_event")
def cb1(ev):
record_event.result = 1
def cb2(ev):
record_event.result = 2
em.connect((record_event, "__call__")) # type: ignore
em.connect(cb1)
em.connect(cb2)
record_event.result = None
em.disconnect(cb2)
em.disconnect(cb2) # should pass silently
ev = em()
record_event.assert_result(event=ev)
record_event.result = None
em.disconnect((record_event, "__call__")) # type: ignore
ev = em()
assert record_event.result == 1
record_event.result = None
em.connect(cb1)
em.connect(cb2)
em.connect((record_event, "__call__")) # type: ignore
em.disconnect()
em()
assert record_event.result is None
def test_emission_order():
"""Event emission order"""
em = EventEmitter(type="test_event")
def cb1(ev):
record_event.result = 1
def cb2(ev):
record_event.result = 2
em.connect(cb1)
em.connect(cb2)
record_event.result = None
em()
assert record_event.result == 1, "Events emitted in wrong order"
em.disconnect()
em.connect(cb2)
em.connect(cb1)
record_event.result = None
em()
assert record_event.result == 2, "Events emitted in wrong order"
def test_event_connect_order():
"""Test event connection order"""
def a(e):
return
def b(e):
return
def c(e):
return
def d(e):
return
def e(e):
return
def f(e):
return
em = EventEmitter(type="test_event")
assert_raises(ValueError, em.connect, c, before=["c", "foo"])
assert_raises(ValueError, em.connect, c, position="foo")
assert_raises(TypeError, em.connect, c, ref=dict())
em.connect(c, ref=True)
assert_equal((c, ), tuple(em.callbacks))
em.connect(c)
assert_equal((c, ), tuple(em.callbacks))
em.connect(d, ref=True, position="last")
assert_equal((c, d), tuple(em.callbacks))
em.connect(b, ref=True) # position='first'
assert_equal((b, c, d), tuple(em.callbacks))
assert_raises(RuntimeError, em.connect, a, before="c", after="d") # can't
em.connect(a, ref=True, before=["c", "d"]) # first possible pos == 0
assert_equal((a, b, c, d), tuple(em.callbacks))
em.connect(f, ref=True, after=["c", "d"])
assert_equal((a, b, c, d, f), tuple(em.callbacks))
em.connect(e, ref=True, after="d", before="f")
assert_equal(("a", "b", "c", "d", "e", "f"), tuple(em.callback_refs))
em.disconnect(e)
em.connect(e, ref=True, after="a", before="f", position="last")
assert_equal(("a", "b", "c", "d", "e", "f"), tuple(em.callback_refs))
em.disconnect(e)
em.connect(e, ref="e", after="d", before="f", position="last")
assert_equal(("a", "b", "c", "d", "e", "f"), tuple(em.callback_refs))
em.disconnect(e)
em.connect(e, after="d", before="f", position="first") # no name
assert_equal(("a", "b", "c", "d", None, "f"), tuple(em.callback_refs))
em.disconnect(e)
assert_raises(ValueError, em.connect, e, ref="d") # duplicate name
em.connect(e, ref=True, after=[], before="f", position="last")
assert_equal(("a", "b", "c", "d", "e", "f"), tuple(em.callback_refs))
assert_equal((a, b, c, d, e, f), tuple(em.callbacks))
old_e = e
def e(): # type: ignore
return
assert_raises(ValueError, em.connect, e, ref=True) # duplicate name
em.connect(e)
assert_equal((None, "a", "b", "c", "d", "e", "f"), tuple(em.callback_refs))
assert_equal((e, a, b, c, d, old_e, f), tuple(em.callbacks))