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# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# gst-python - Python bindings for GStreamer
# Copyright (C) 2007 Johan Dahlin
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import gobject
gobject.threads_init()
from common import gst, TestCase
F = gst.Fraction
class TestFraction(TestCase):
def testConstructor(self):
frac = F(1, 2)
self.assertEquals(frac.num, 1)
self.assertEquals(frac.denom, 2)
frac = F(1)
self.assertEquals(frac.num, 1)
self.assertEquals(frac.denom, 1)
self.assertRaises(TypeError, F)
def testRepr(self):
self.assertEquals(repr(F(1, 2)), '<gst.Fraction 1/2>')
def testEqNe(self):
frac = F(1, 2)
self.assertEquals(frac, frac)
self.assertEquals(F(1, 2), F(1, 2))
self.assertEquals(F(2, 4), F(1, 2))
self.assertNotEquals(F(1, 3), F(1, 2))
self.assertNotEquals(F(2, 1), F(1, 2))
def testMul(self):
self.assertEquals(F(1, 2) * F(1, 2), F(1, 4))
self.assertEquals(F(2, 3) * F(4, 5), F(8, 15))
self.assertEquals(F(1, 3) * F(4), F(4, 3))
self.assertEquals(F(1, 3) * 4, F(4, 3))
def testRMul(self):
self.assertEquals(2 * F(1, 2), F(1))
self.assertEquals(4 * F(1, 2), F(2))
self.assertEquals(-10 * F(1, 2), F(-5))
def testDiv(self):
self.assertEquals(F(1, 3) / F(1, 4), F(4, 3))
self.assertEquals(F(2, 3) / F(4, 5), F(10, 12))
self.assertEquals(F(1, 3) / F(4), F(1, 12))
self.assertEquals(F(1, 3) / 4, F(1, 12))
self.assertEquals(F(1, 3) / 2, F(1, 6))
self.assertEquals(F(1, 5) / -4, F(1, -20))
def testRDiv(self):
self.assertEquals(2 / F(1, 3), F(6, 1))
self.assertEquals(-4 / F(1, 5), F(-20, 1))
def testFloat(self):
self.assertEquals(float(F(1, 2)), 0.5)
def testPropertyMarshalling(self):
try:
obj = gst.element_factory_make("videoparse")
except gst.ElementNotFoundError:
# no videoparse and I don't know of any elements in core or -base using
# fraction properties. Skip this test.
return
value = obj.props.framerate
self.failUnlessEqual(value.num, 25)
self.failUnlessEqual(value.denom, 1)
obj.props.framerate = gst.Fraction(2, 1)
value = obj.props.framerate
self.failUnlessEqual(value.num, 2)
self.failUnlessEqual(value.denom, 1)
def bad():
obj.props.framerate = 1
self.failUnlessRaises(TypeError, bad)
value = obj.props.framerate
self.failUnlessEqual(value.num, 2)
self.failUnlessEqual(value.denom, 1)
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