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import unittest
import sys
import os
import IECore
import IECoreScene

class TestOBJReader( unittest.TestCase ) :

	def testRead( self ) :

		self.testfile = os.path.join( "test", "IECore", "data", "obj", "triangle.obj" )

		r = IECore.Reader.create(self.testfile)
		self.assertEqual(type(r), IECoreScene.OBJReader)

		mesh = r.read()

		self.assertTrue( mesh.isInstanceOf( IECoreScene.MeshPrimitive.staticTypeId() ) )
		self.assertTrue( mesh.arePrimitiveVariablesValid() )
		self.assertEqual( len( mesh ), 1 )
		self.assertTrue( "P" in mesh )

	def testReadNormals( self ) :

		self.testfile = os.path.join( "test", "IECore", "data", "obj", "triangle_normals.obj" )

		r = IECore.Reader.create(self.testfile)
		self.assertEqual(type(r), IECoreScene.OBJReader)

		mesh = r.read()

		self.assertTrue( mesh.isInstanceOf( IECoreScene.MeshPrimitive.staticTypeId() ) )
		self.assertTrue( mesh.arePrimitiveVariablesValid() )
		self.assertEqual( len( mesh ), 4 )
		self.assertTrue( "P" in mesh )
		self.assertTrue( "N" in mesh )
		self.assertTrue( "s" in mesh )
		self.assertTrue( "t" in mesh )

	def testReadNoTexture( self ) :

		self.testfile = os.path.join( "test", "IECore", "data", "obj", "triangle_no_texture.obj" )

		r = IECore.Reader.create(self.testfile)
		self.assertEqual(type(r), IECoreScene.OBJReader)

		mesh = r.read()

		self.assertTrue( mesh.isInstanceOf( IECoreScene.MeshPrimitive.staticTypeId() ) )
		self.assertTrue( mesh.arePrimitiveVariablesValid() )
		self.assertEqual( len( mesh ), 2 )
		self.assertTrue( "P" in mesh )
		self.assertTrue( "N" in mesh )

	def testGroups( self ) :

		self.testfile = os.path.join( "test", "IECore", "data", "obj", "groups.obj" )

		r = IECore.Reader.create(self.testfile)
		self.assertEqual(type(r), IECoreScene.OBJReader)

		mesh = r.read()

		self.assertTrue( mesh.isInstanceOf( IECoreScene.MeshPrimitive.staticTypeId() ) )
		self.assertTrue( mesh.arePrimitiveVariablesValid() )

if __name__ == "__main__":

	unittest.main()
