cadquery/tests/TestImporters.py

"""
    Tests file importers such as STEP
"""
#core modules
import StringIO

from cadquery import *
from cadquery import exporters
from cadquery import importers
from tests import BaseTest

#where unit test output will be saved
import sys
if sys.platform.startswith("win"):
    OUTDIR = "c:/temp"
else:
    OUTDIR = "/tmp"


class TestImporters(BaseTest):
    def importBox(self, importType, fileName):
        """
        Exports a simple box to a STEP file and then imports it again
        :param importType: The type of file we're importing (STEP, STL, etc)
        :param fileName: The path and name of the file to write to
        """
        #We're importing a STEP file
        if importType == importers.ImportTypes.STEP:
            #We first need to build a simple shape to export
            shape = Workplane("XY").box(1, 2, 3).val()

            #Export the shape to a temporary file
            shape.exportStep(fileName)

            # Reimport the shape from the new STEP file
            importedShape = importers.importShape(importType,fileName)

            #Check to make sure we got a solid back
            self.assertTrue(importedShape.val().ShapeType() == "Solid")

            #Check the number of faces and vertices per face to make sure we have a box shape
            self.assertTrue(importedShape.faces("+X").size() == 1 and importedShape.faces("+X").vertices().size() == 4)
            self.assertTrue(importedShape.faces("+Y").size() == 1 and importedShape.faces("+Y").vertices().size() == 4)
            self.assertTrue(importedShape.faces("+Z").size() == 1 and importedShape.faces("+Z").vertices().size() == 4)

    def testSTEP(self):
        """
        Tests STEP file import
        """
        self.importBox(importers.ImportTypes.STEP, OUTDIR + "/tempSTEP.step")

if __name__ == '__main__':
    import unittest
    unittest.main()