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- add docs - add missing SIP bindings - remove unnecessary cast from double->float->double - add unit tests
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# -*- coding: utf-8 -*- | ||
"""QGIS Unit tests for QgsMapUnitScale. | ||
.. note:: This program is free software; you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation; either version 2 of the License, or | ||
(at your option) any later version. | ||
""" | ||
__author__ = 'Nyall Dawson' | ||
__date__ = '2015-09' | ||
__copyright__ = 'Copyright 2015, The QGIS Project' | ||
# This will get replaced with a git SHA1 when you do a git archive | ||
__revision__ = '$Format:%H$' | ||
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import qgis | ||
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from qgis.core import (QgsMapUnitScale, QgsRenderContext, QgsMapSettings, QgsRectangle) | ||
from PyQt4.QtCore import QSize | ||
from utilities import (TestCase, unittest) | ||
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class PyQgsMapUnitScale(TestCase): | ||
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def testConstructor(self): | ||
#test creating QgsMapUnitScale | ||
c = QgsMapUnitScale() | ||
self.assertEqual(c.minScale, 0) | ||
self.assertEqual(c.maxScale, 0) | ||
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c = QgsMapUnitScale(0.0001, 0.005) | ||
self.assertEqual(c.minScale, 0.0001) | ||
self.assertEqual(c.maxScale, 0.005) | ||
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def testEquality(self): | ||
#test equality operator | ||
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c1 = QgsMapUnitScale(0.0001, 0.005) | ||
c2 = QgsMapUnitScale(0.0001, 0.005) | ||
self.assertEqual(c1, c2) | ||
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c2.minScale = 0.0004 | ||
self.assertNotEqual(c1, c2) | ||
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c2.minScale = 0.0001 | ||
c2.maxScale = 0.007 | ||
self.assertNotEqual(c1, c2) | ||
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c2.maxScale = 0.005 | ||
self.assertEqual(c1, c2) | ||
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def testMapUnitsPerPixel(self): | ||
#test computeMapUnitsPerPixel | ||
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ms = QgsMapSettings() | ||
ms.setExtent(QgsRectangle(0, 0, 100, 100)) | ||
ms.setOutputSize(QSize(100, 50)) | ||
r = QgsRenderContext.fromMapSettings(ms) | ||
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#renderer scale should be about 1:291937841 | ||
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#start with no min/max scale | ||
c = QgsMapUnitScale() | ||
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mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 2.0, places=5) | ||
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#add a minimum scale less than the renderer scale, so should be no change | ||
c.minScale = 1 / 350000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 2.0, places=5) | ||
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#minimum scale greater than the renderer scale, so should be limited to minScale | ||
c.minScale = 1 / 150000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 1.0276160, places=5) | ||
c.minScale = 1 / 50000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 0.3425386, places=5) | ||
c.minScale = 1 / 350000000.0 | ||
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#add a maximum scale greater than the renderer scale, so should be no change | ||
c.maxScale = 1 / 150000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 2.0, places=5) | ||
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#maximum scale less than the renderer scale, so should be limited to maxScale | ||
c.maxScale = 1 / 350000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 2.3977706, places=5) | ||
c.maxScale = 1 / 500000000.0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 3.4253867, places=5) | ||
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#test resetting to min/max | ||
c.minScale = 0 | ||
c.maxScale = 0 | ||
mup = c.computeMapUnitsPerPixel(r) | ||
self.assertAlmostEqual(mup, 2.0, places=5) | ||
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if __name__ == '__main__': | ||
unittest.main() |