def test_timeintervaltools_TimeInterval_scale_by_rational_01():
r'''TimeInterval.scale_by_rational returns a new TimeInterval instance unless offset is 1.
'''
i1 = TimeInterval(3, 23)
i2 = i1.scale_by_rational(2)
assert i1 != i2
i2 = i1.scale_by_rational(1)
assert i1 == i2
def test_timeintervaltools_TimeInterval_scale_by_rational_03():
r'''TimeInterval duration can be scaled with Fractions.
'''
i1 = TimeInterval(3, 23)
i2 = i1.scale_by_rational(Fraction(1, 2))
assert i2.start_offset == 3
assert i2.duration == 10
def test_timeintervaltools_TimeInterval_scale_by_rational_02():
r'''TimeInterval duration can be scaled with ints.
'''
i1 = TimeInterval(3, 23)
i2 = i1.scale_by_rational(2)
assert i2.start_offset == 3
assert i2.duration == 40
