def test_3_2_6_3_if_rejected():
"""
Testing return of pending promises to make
sure they are properly chained.
This covers the case where the root promise
is rejected before the chaining is defined.
"""
p1 = Promise()
p1.reject("Error")
pending = Promise()
pending.fulfill(10)
pr = p1.then(None, lambda r: pending)
assert pending.isFulfilled()
assert_equals(10, pending.value)
assert pr.isFulfilled()
assert_equals(10, pr.value)
p2 = Promise()
p2.reject("Error")
bad = Promise()
bad.reject("Assertion")
pr = p2.then(None, lambda r: bad)
assert bad.isRejected()
assert_equals("Assertion", bad.reason)
assert pr.isRejected()
assert_equals("Assertion", pr.reason)
def test_3_2_6_3_when_fulfilled():
"""
Testing return of pending promises to make
sure they are properly chained.
This covers the case where the root promise
is fulfilled after the chaining is defined.
"""
p1 = Promise()
pending = Promise()
pf = p1.then(lambda r: pending)
assert pending.isPending()
assert pf.isPending()
p1.fulfill(10)
pending.fulfill(5)
assert pending.isFulfilled()
assert_equals(5, pending.value)
assert pf.isFulfilled()
assert_equals(5, pf.value)
p2 = Promise()
bad = Promise()
pr = p2.then(lambda r: bad)
assert bad.isPending()
assert pr.isPending()
p2.fulfill(10)
bad.reject("Error")
assert bad.isRejected()
assert_equals("Error", bad.reason)
assert pr.isRejected()
assert_equals("Error", pr.reason)
