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# Copyright (c) 2002 by Intevation GmbH
# Authors:
# Frank Koormann <frank.koormann@intevation.de>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.
"""
Test the Thuban scalebar calculations
"""
__version__ = "$Revision: 1674 $"
# $Source$
# $Id: test_scalebar.py 1674 2003-08-28 13:07:58Z bh $
import unittest
import os
import support
support.initthuban()
from Thuban.Model.scalebar import deriveInterval, roundInterval
class TestScalebar(unittest.TestCase, support.FloatComparisonMixin):
"""Test cases for the Thuban scalebar calculations
"""
def test_deriveInterval(self):
"""Test scalebar.deriveInterval()"""
# Zero savety
interval, unit = deriveInterval(100, 0.0)
self.assertEquals(interval, -1)
self.assertEquals(unit, '')
# meters
interval, unit = deriveInterval(100, 0.5)
self.assertEquals(interval, 200)
self.assertEquals(unit, 'm')
# kilometer conversion
interval, unit = deriveInterval(100, 0.05)
self.assertEquals(interval, 2)
self.assertEquals(unit, 'km')
def test_roundInterval(self):
"""Test scalebar.roundInterval()"""
# 0.0005
interval, label = roundInterval(0.000545943795)
self.assertFloatEqual(interval, 0.0005)
self.assertEquals(label, '0.0005')
# 0.005
interval, label = roundInterval(0.00545943795)
self.assertFloatEqual(interval, 0.005)
self.assertEquals(label, '0.005')
# 0.05
interval, label = roundInterval(0.0545943795)
self.assertFloatEqual(interval, 0.05)
self.assertEquals(label, '0.05')
# 0.5
interval, label = roundInterval(0.545943795)
self.assertFloatEqual(interval, 0.5)
self.assertEquals(label, '0.5')
# 5
interval, label = roundInterval(5.45943795)
self.assertFloatEqual(interval, 5)
self.assertEquals(label, '5')
# 50
interval, label = roundInterval(54.5943795)
self.assertFloatEqual(interval, 50)
self.assertEquals(label, '50')
# 500
interval, label = roundInterval(545.943795)
self.assertFloatEqual(interval, 500)
self.assertEquals(label, '500')
# 5000
interval, label = roundInterval(5459.43795)
self.assertFloatEqual(interval, 5000)
self.assertEquals(label, '5000')
# 50000
interval, label = roundInterval(54594.3795)
self.assertFloatEqual(interval, 50000)
self.assertEquals(label, '50000')
# 500000
interval, label = roundInterval(545943.795)
self.assertFloatEqual(interval, -1)
self.assertEquals(label, '')
if __name__ == "__main__":
unittest.main()
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