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Viewing changes to enthought/chaco2/tests/instantiation_order_test_case.py

  • Committer: Bazaar Package Importer
  • Author(s): Varun Hiremath
  • Date: 2010-02-28 14:05:25 UTC
  • mfrom: (1.1.3 upstream)
  • Revision ID: james.westby@ubuntu.com-20100228140525-1eo43ddoakb2j3j9
Tags: 3.3.0-1
* New upstream release
* Switch to source format 3.0 (quilt)
* Bump Standards-Version to 3.8.4
* Remove transition package: python-enthought-chaco2

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enthought/chaco2/tests/instantiation_order_test_case.py
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"""
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Tests that various plot and data objects can be instantiated, assigned, and
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re-assigned in any order.
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"""
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import unittest
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from numpy import array
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from enthought.chaco2.api import ArrayDataSource, DataRange1D, \
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                                 LinearMapper
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class DataPipelineTestCase(unittest.TestCase):
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    def test_piecewise_construction(self):
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        ary = array([1,2,3,4,5,6,7])
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        ds = ArrayDataSource()
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        ds.set_data(ary)
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        r = DataRange1D()
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        r.add(ds)
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        self.assert_(r.low_setting == "auto")
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        self.assert_(r.high_setting == "auto")
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        self.assert_(r.low == 1)
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        self.assert_(r.high == 7)
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        mapper = LinearMapper()
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        mapper.range = r
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        mapper.low_pos = 1.0
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        mapper.high_pos = 7.0
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        screen_pts = mapper.map_screen(array([1,3,7]))
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        self.assert_(tuple(screen_pts) == (1.0, 3.0, 7.0))
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        return
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    def test_reverse_construction(self):
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        mapper = LinearMapper()
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        r = DataRange1D()
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        ds = ArrayDataSource()
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        ary = array([1,2,3,4,5,6,7])
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        mapper.range = r
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        mapper.low_pos = 1.0
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        mapper.high_pos = 7.0
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        r.add(ds)
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        ds.set_data(ary)
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        self.assert_(r.low == 1)
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        self.assert_(r.high == 7)
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        screen_pts = mapper.map_screen(array([1,3,7]))
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        self.assert_(tuple(screen_pts) == (1.0, 3.0, 7.0))
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        return
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if __name__ == '__main__':
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    import nose
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    nose.run()