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# Author: Suyog Dutt Jain <suyog.jain@aero.iitb.ac.in>
# Prabhu Ramachandran <prabhu_r@users.sf.net>
# Copyright (c) 2008-2020, Enthought, Inc.
# License: BSD Style.
# Standard library imports.
from os.path import abspath
from io import BytesIO
import copy
import unittest
# Enthought library imports
from mayavi.core.null_engine import NullEngine
from mayavi.core.common import get_output
from mayavi.sources.api import VTKXMLFileReader
from mayavi.filters.contour import Contour
from mayavi.filters.api import PolyDataNormals
from mayavi.filters.set_active_attribute import SetActiveAttribute
from mayavi.modules.api import Surface, Outline
# Local imports.
from mayavi.tests.common import get_example_data
class TestSetActiveAttribute(unittest.TestCase):
def setUp(self):
"""Initial setting up of test fixture, automatically called by TestCase before any other test method is invoked"""
e = NullEngine()
# Uncomment to see visualization for debugging etc.
#e = Engine()
e.start()
e.new_scene()
self.e=e
r = VTKXMLFileReader()
r.initialize(get_example_data('pyramid_ug.vtu'))
e.add_source(r)
r.point_scalars_name = 'temperature'
o = Outline()
e.add_module(o)
c = Contour()
e.add_filter(c)
n = PolyDataNormals()
e.add_filter(n)
aa = SetActiveAttribute()
e.add_filter(aa)
aa.point_scalars_name = 'pressure'
s = Surface()
e.add_module(s)
self.scene = e.current_scene
return
def tearDown(self):
"""For necessary clean up, automatically called by TestCase after the test methods have been invoked"""
self.e.stop()
return
def check(self):
"""Do the actual testing"""
scene = self.scene
src = scene.children[0]
self.assertEqual(src.point_scalars_name,'temperature')
c = src.children[1]
sc = get_output(c.outputs[0]).point_data.scalars
self.assertEqual(sc.name,'temperature')
# It is an iso-contour! Allow rounding differences
self.assertAlmostEqual(sc.range[0], sc.range[1], places=5)
aa = c.children[0].children[0]
self.assertEqual(aa.point_scalars_name,'pressure')
sc = get_output(aa.outputs[0]).point_data.scalars
self.assertEqual(sc.name, 'pressure')
self.assertEqual((abs(sc.range[0] - 70) < 1.0),True)
self.assertEqual((abs(sc.range[1] - 70) < 1.0),True)
s = aa.children[0].children[0]
def test_set_active_attribute(self):
"Test if the test fixture works"
#Now test.
self.check()
#from mayavi.tools.show import show
#show()
def test_save_and_restore(self):
"""Test if saving a visualization and restoring it works."""
engine = self.e
scene = self.scene
# Save visualization.
f = BytesIO()
f.name = abspath('test.mv2') # We simulate a file.
engine.save_visualization(f)
f.seek(0) # So we can read this saved data.
# Remove existing scene.
engine.close_scene(scene)
# Load visualization
engine.load_visualization(f)
self.scene = engine.current_scene
self.check()
def test_deepcopied(self):
"""Test if the MayaVi2 visualization can be deep-copied."""
############################################################
# Test if the MayaVi2 visualization can be deep-copied.
# Pop the source object.
s = self.scene
source = s.children.pop()
# Add it back to see if that works without error.
s.children.append(source)
self.check()
# Now deepcopy the source and replace the existing one with
# the copy. This basically simulates cutting/copying the
# object from the UI via the right-click menu on the tree
# view, and pasting the copy back.
source1 = copy.deepcopy(source)
s.children[0] = source1
self.check()
#from mayavi.tools.show import show
#show()
if __name__ == '__main__':
unittest.main()
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