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linearmapper_test_case.py
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linearmapper_test_case.py
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import unittest
from numpy import array
from numpy.testing import assert_array_almost_equal, assert_equal
from chaco.api import ArrayDataSource, DataRange1D, LinearMapper
class LinearMapperTestCase(unittest.TestCase):
def test_basic(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r)
self.assertFalse(mapper._low_bound_initialized)
self.assertFalse(mapper._high_bound_initialized)
mapper.low_pos=50
self.assertTrue(mapper._low_bound_initialized)
mapper.high_pos=100
self.assertTrue(mapper._high_bound_initialized)
result = mapper.map_screen(ary)
assert_equal(result , array([50, 60, 70, 80, 90, 100]))
return
def test_reversed(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r)
self.assertFalse(mapper._low_bound_initialized)
self.assertFalse(mapper._high_bound_initialized)
mapper.low_pos=100
self.assertTrue(mapper._low_bound_initialized)
mapper.high_pos=0
self.assertTrue(mapper._high_bound_initialized)
result = mapper.map_screen(ary)
assert_equal(result , array([100, 80, 60, 40, 20, 0]))
return
def test_set_screen_bounds(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r)
self.assertFalse(mapper._low_bound_initialized)
self.assertFalse(mapper._high_bound_initialized)
mapper.screen_bounds = (50.0, 100.0)
self.assertTrue(mapper._low_bound_initialized)
self.assertTrue(mapper._high_bound_initialized)
result = mapper.map_screen(ary)
assert_equal(result , array([50, 60, 70, 80, 90, 100]))
return
def test_reversed_set_screen_bounds(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r)
self.assertFalse(mapper._low_bound_initialized)
self.assertFalse(mapper._high_bound_initialized)
mapper.screen_bounds = (100.0, 0.0)
self.assertTrue(mapper._low_bound_initialized)
self.assertTrue(mapper._high_bound_initialized)
result = mapper.map_screen(ary)
assert_equal(result , array([100, 80, 60, 40, 20, 0]))
return
def test_update_screen_bounds_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.screen_bounds = (40.0, 120.0)
result = mapper.map_screen(ary)
assert_array_almost_equal(
result, array([40.0, 56.0, 72.0, 88.0, 104.0, 120.0]))
def test_update_screen_bounds_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.screen_bounds = (40.0, 120.0)
result = mapper.map_screen(ary)
assert_array_almost_equal(
result, array([40.0, 50.0, 60.0, 70.0, 80.0, 90.0]))
def test_reversed_update_screen_bounds_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 0.0)
mapper.screen_bounds = (120.0, -10.0)
result = mapper.map_screen(ary)
assert_array_almost_equal(
result, array([120.0, 94.0, 68.0, 42.0, 16.0, -10.0]))
def test_reversed_update_screen_bounds_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 0.0)
mapper.screen_bounds = (120.0, -10.0)
result = mapper.map_screen(ary)
assert_array_almost_equal(
result, array([120.0, 100.0, 80.0, 60.0, 40.0, 20.0]))
def test_update_low_pos_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 40.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([40, 52, 64, 76, 88, 100]))
def test_update_low_pos_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 40.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([40, 50, 60, 70, 80, 90]))
def test_reversed_update_low_pos_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 50.0)
mapper.low_pos = 110.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([110, 98, 86, 74, 62, 50]))
def test_reversed_update_low_pos_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 50.0)
mapper.low_pos = 110.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([110, 100, 90, 80, 70, 60]))
def test_update_high_pos_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 110.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 62, 74, 86, 98, 110]))
def test_update_high_pos_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 110.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 60, 70, 80, 90, 100]))
def test_reversed_update_high_pos_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 50.0)
mapper.high_pos = 40.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([100, 88, 76, 64, 52, 40]))
def test_reversed_update_high_pos_dont_stretch_data(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (100.0, 50.0)
mapper.high_pos = 40.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([100, 90, 80, 70, 60, 50]))
def test_update_low_pos_stretch_data_with_reverse(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 150.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([150, 140, 130, 120, 110, 100]))
def test_update_low_pos_dont_stretch_data_with_reverse(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 150.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([150, 160, 170, 180, 190, 200]))
def test_update_high_pos_stretch_data_with_reverse(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 0.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 40, 30, 20, 10, 0]))
def test_update_high_pos_dont_stretch_data_with_reverse(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 0.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 60, 70, 80, 90, 100]))
def test_update_low_pos_stretch_data_with_zero(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 100.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([100, 100, 100, 100, 100, 100]))
def test_update_low_pos_dont_stretch_data_with_zero(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.low_pos = 100.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([100, 100, 100, 100, 100, 100]))
def test_update_high_pos_stretch_data_with_zero(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=True)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 50.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 50, 50, 50, 50, 50]))
def test_update_high_pos_dont_stretch_data_with_zero(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, stretch_data=False)
# Initialize the bounds, then modify them.
mapper.screen_bounds = (50.0, 100.0)
mapper.high_pos = 100.0
result = mapper.map_screen(ary)
assert_array_almost_equal(result, array([50, 60, 70, 80, 90, 100]))
if __name__ == '__main__':
import nose
nose.run()