text: #!/pxrpythonsubst
  #
  # Copyright 2018 Pixar
  #
  # Licensed under the Apache License, Version 2.0 (the "Apache License")
  # with the following modification; you may not use this file except in
  # compliance with the Apache License and the following modification to it:
  # Section 6. Trademarks. is deleted and replaced with:
  #
  # 6. Trademarks. This License does not grant permission to use the trade
  #    names, trademarks, service marks, or product names of the Licensor
  #    and its affiliates, except as required to comply with Section 4(c) of
  #    the License and to reproduce the content of the NOTICE file.
  #
  # You may obtain a copy of the Apache License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the Apache License with the above modification is
  # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied. See the Apache License for the specific
  # language governing permissions and limitations under the Apache License.
  #
  
  
  import os
  import unittest
  
  from maya import cmds
  from maya import standalone
  
  from pxr import Usd
  from pxr import UsdGeom
  from pxr import Vt
  from pxr import Gf
  
  
  class testUsdExportParticles(unittest.TestCase):
  
      @classmethod
      def setUpClass(cls):
          standalone.initialize('usd')
  
          cmds.file(os.path.abspath('UsdExportParticlesTest.ma'), open=True,
              force=True)
  
          cmds.loadPlugin('pxrUsd', quiet=True)
  
      @classmethod
      def tearDownClass(cls):
          standalone.uninitialize()
  
      def testExportInstances(self):
          usdFile = os.path.abspath('UsdExportParticles_particles.usda')
          cmds.usdExport(mergeTransformAndShape=False, exportInstances=False,
              shadingMode='none', file=usdFile, frameRange=(1, 1))
  
          stage = Usd.Stage.Open(usdFile)
  
          p = UsdGeom.Points.Get(stage, '/particle1/particleShape1')
          self.assertTrue(p.GetPrim().IsValid())
          self.assertEqual(p.GetPointsAttr().Get(1), Vt.Vec3fArray(5, (Gf.Vec3f(5.0, 0.0, -6.0), Gf.Vec3f(-4.0, 0.0, -4.5), Gf.Vec3f(-4.5, 0.0, 3.0), Gf.Vec3f(-2.0, 0.0, 8.5), Gf.Vec3f(3.0, 0.0, 3.5))))
          self.assertEqual(p.GetVelocitiesAttr().Get(1), Vt.Vec3fArray(5, (Gf.Vec3f(0.0, 0.0, 0.0), Gf.Vec3f(1.0, 1.0, 1.0), Gf.Vec3f(2.0, 3.0, 4.0), Gf.Vec3f(5.0, 6.0, 7.0), Gf.Vec3f(8.0, 9.0, 10.0))))
          self.assertEqual(p.GetWidthsAttr().Get(1), Vt.FloatArray(5, (2.0, 2.0, 2.0, 2.0, 2.0)))
          self.assertEqual(p.GetIdsAttr().Get(1), Vt.Int64Array(5, (0, 1, 2, 3, 4)))
  
  if __name__ == '__main__':
      unittest.main(verbosity=2)
  