def test_promise_all():
p = Promise.all([])
assert p.is_resolved
assert p.value == []
p = Promise.all({})
assert p.is_resolved
assert p.value == {}
p = Promise.all([
Promise.resolved(1),
Promise.resolved(2),
Promise.resolved(3),
])
assert p.is_resolved
assert p.value == [1, 2, 3]
p = Promise.all({
'key1': Promise.resolved(1),
'key2': Promise.resolved(2),
'key3': Promise.resolved(3),
})
assert p.is_resolved
assert p.value == {'key1': 1, 'key2': 2, 'key3': 3}
p = Promise.all([
Promise.resolved(1),
Promise.rejected(2),
Promise.resolved(3),
])
assert p.is_rejected
assert p.reason == 2
def test_rejected_promise():
err = RuntimeError('So fail')
p = Promise.rejected(err)
assert not p.is_resolved
assert not p.is_pending
assert p.is_rejected
assert p.reason == err
def test_promise_all():
p = Promise.all([])
assert p.is_resolved
assert p.value == []
p = Promise.all({})
assert p.is_resolved
assert p.value == {}
p = Promise.all([
Promise.resolved(1),
Promise.resolved(2),
Promise.resolved(3),
])
assert p.is_resolved
assert p.value == [1, 2, 3]
p = Promise.all({
"key1": Promise.resolved(1),
"key2": Promise.resolved(2),
"key3": Promise.resolved(3),
})
assert p.is_resolved
assert p.value == {"key1": 1, "key2": 2, "key3": 3}
p = Promise.all([
Promise.resolved(1),
Promise.rejected(2),
Promise.resolved(3),
])
assert p.is_rejected
assert p.reason == 2
def test_failure_callbacks():
results = []
p = Promise()
assert p.is_pending
p.done(on_failure=results.append)
assert results == []
p.reject(42)
assert results == [42]
p = Promise.rejected(23)
p.done(on_failure=results.append)
assert results == [42, 23]
