# Project:  MapServer
# Purpose:  xUnit style Python mapscript tests of Map "zooming"
# Author:   Sean Gillies, sgillies@frii.com
#
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# Copyright (c) 2004, Sean Gillies
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import unittest
import mapscript
from .testing import MapPrimitivesTestCase


class LineObjTestCase(MapPrimitivesTestCase):
    """Testing the lineObj class in stand-alone mode"""

    def setUp(self):
        """The test fixture is a line with two points"""
        self.points = (mapscript.pointObj(0.0, 1.0),
                       mapscript.pointObj(2.0, 3.0))
        self.line = mapscript.lineObj()
        self.addPointToLine(self.line, self.points[0])
        self.addPointToLine(self.line, self.points[1])

    def testCreateLine(self):
        """created line has the correct number of points"""
        assert self.line.numpoints == 2

    def testGetPointsFromLine(self):
        """points in the line share are the same that were input"""
        for i in range(len(self.points)):
            got_point = self.getPointFromLine(self.line, i)
            self.assertPointsEqual(got_point, self.points[i])

    def testAddPointToLine(self):
        """adding a point to a line behaves correctly"""
        new_point = mapscript.pointObj(4.0, 5.0)
        self.addPointToLine(self.line, new_point)
        assert self.line.numpoints == 3

    def xtestAlterNumPoints(self):
        """
        numpoints is immutable, this should raise error
        """
        # The following works locally but fails on Appveyor (error is not raised)
        # with self.assertRaises(AttributeError):
        #    self.line.numpoints = 3

        # the following approach also fails on appveyor
        error_thrown = False
        try:
            self.line.numpoints = 3
        except AttributeError:
            error_thrown = True

        assert error_thrown is True

    def testLineGeoInterface(self):
        """return line using the  __geo_interface__ protocol"""
        assert self.line.__geo_interface__ == {"type": "LineString", "coordinates": [(0.0, 1.0), (2.0, 3.0)]}


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