def test_sequencetools_all_are_equal_01():
r'''True when all elements in sequence are equal.
'''
assert sequencetools.all_are_equal([-1, -1, -1, -1, -1])
assert sequencetools.all_are_equal([0, 0, 0, 0, 0])
assert sequencetools.all_are_equal([1, 1, 1, 1, 1])
assert sequencetools.all_are_equal([2, 2, 2, 2, 2])
def test_sequencetools_all_are_equal_03():
r'''False otherwise.
'''
assert not sequencetools.all_are_equal([-1, -1, -1, -1, 99])
assert not sequencetools.all_are_equal([0, 0, 0, 0, 99])
assert not sequencetools.all_are_equal([1, 1, 1, 1, 99])
assert not sequencetools.all_are_equal([2, 2, 2, 2, 99])
def all_leaves_are_in_same_parent(self):
r"""True when all leaves in tie chain are in same parent.
Returns boolean.
"""
return sequencetools.all_are_equal([leaf._parent for leaf in self.leaves])
def test_sequencetools_all_are_equal_04():
r'''False when expr is not a sequence.
'''
assert not sequencetools.all_are_equal(17)
def test_sequencetools_all_are_equal_02():
r'''True on empty sequence.
'''
assert sequencetools.all_are_equal([])
