Add tests to write and read 3D vector points

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@60910 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/python/pygrass/vector/testsuite/test_geometry.py

@@ -0,0 +1,130 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Jun 19 14:13:53 2014
+
+@author: pietro
+"""
+import sys
+import unittest
+import numpy as np
+
+import grass.lib.vector as libvect
+
+from grass.pygrass.vector.geometry import Point, Line
+
+
+class PointTestCase(unittest.TestCase):
+
+    def test_empty_init(self):
+        """Test Point()"""
+        point = Point()
+        self.assertEqual(point.gtype, libvect.GV_POINT)
+        self.assertEqual(point.x, 0)
+        self.assertEqual(point.y, 0)
+        self.assertIsNone(point.z)
+        self.assertTrue(point.is2D)
+
+    def test_init_3d(self):
+        """Test 3D Point(1, 2, 3)"""
+        point = Point(1, 2, 3)
+        self.assertEqual(point.x, 1)
+        self.assertEqual(point.y, 2)
+        self.assertEqual(point.z, 3)
+        self.assertFalse(point.is2D)
+
+    def test_switch_2D_3D_2D(self):
+        """Test switch between: 2D => 3D => 2D"""
+        point = Point()
+        self.assertIsNone(point.z)
+        self.assertTrue(point.is2D)
+        point.z = 1
+        self.assertFalse(point.is2D)
+        point.z = None
+        self.assertTrue(point.is2D, True)
+
+    def test_coords(self):
+        """Test coords method"""
+        self.assertEqual(Point(1, 2).coords(), (1, 2))
+        self.assertEqual(Point(1, 2, 3).coords(), (1, 2, 3))
+
+    def test_get_wkt(self):
+        """Test coords method"""
+        self.assertEqual(Point(1, 2).get_wkt(), 'POINT(1.000000 2.000000)')
+        self.assertEqual(Point(1, 2, 3).get_wkt(),
+                         'POINT(1.000000 2.000000 3.000000)')
+
+    def test_distance(self):
+        """Test distance method"""
+        point0 = Point(0, 0, 0)
+        point1 = Point(1, 0)
+        self.assertEqual(point0.distance(point1), 1.0)
+        point1.z = 1
+        self.assertAlmostEqual(point0.distance(point1), np.sqrt(2.))
+
+    def test_eq(self):
+        """Test __eq__"""
+        point0 = Point(0, 0)
+        point1 = Point(1, 0)
+        self.assertFalse(point0 == point1)
+        self.assertFalse(point0 == (1, 0))
+        self.assertTrue(point0 == point0)
+        self.assertTrue(point0 == (0, 0))
+
+    def test_repr(self):
+        """Test __eq__"""
+        self.assertEqual(repr(Point(1, 2)), 'Point(1.000000, 2.000000)')
+        self.assertEqual(repr(Point(1, 2, 3)),
+                         'Point(1.000000, 2.000000, 3.000000)')
+
+    @unittest.skip("Not implemented yet.")
+    def test_buffer(self):
+        """Test buffer method"""
+        # TODO: verify if the buffer depends from the mapset's projection
+        pass
+
+
+class LineTestCase(unittest.TestCase):
+
+    def test_len(self):
+        """Test __len__ magic method"""
+        self.assertEqual(len(Line()), 0)
+        self.assertEqual(len(Line([(0, 0), (1, 1)])), 2)
+
+    @unittest.skipIf(sys.version_info[:2] < (2, 7), "Require Python >= 2.7")
+    def test_getitem(self):
+        """Test __getitem__ magic method"""
+        line = Line([(0, 0), (1, 1), (2, 2), (3, 3), (4, 4)])
+        self.assertTupleEqual(line[0].coords(), (0, 0))
+        self.assertTupleEqual(line[1].coords(), (1, 1))
+        self.assertTupleEqual(line[-2].coords(), (3, 3))
+        self.assertTupleEqual(line[-1].coords(), (4, 4))
+        self.assertListEqual([p.coords() for p in line[:2]], [(0, 0), (1, 1)])
+        self.assertListEqual([p.coords() for p in line[::2]],
+                             [(0, 0), (2, 2), (4, 4)])
+        with self.assertRaises(IndexError):
+            line[5]
+
+    @unittest.skipIf(sys.version_info[:2] < (2, 7), "Require Python >= 2.7")
+    def test_setitem(self):
+        """Test __setitem__ magic method"""
+        line = Line([(0, 0), (1, 1)])
+        self.assertTupleEqual(line[0].coords(), (0., 0.))
+        line[0] = (10, 10)
+        self.assertTupleEqual(line[0].coords(), (10., 10.))
+
+    @unittest.skipIf(sys.version_info[:2] < (2, 7), "Require Python >= 2.7")
+    def test_get_pnt(self):
+        """Test get_pnt method"""
+        line = Line([(0, 0), (1, 1)])
+        with self.assertRaises(ValueError):
+            line.get_pnt(5)
+        vals = (0.7071067811865475, 0.7071067811865475)
+        self.assertTupleEqual(line.get_pnt(1).coords(), vals)
+
+    def test_bbox(self):
+        line = Line([(0, 0), (0, 1), (2, 1), (2, 0)])
+        bbox = line.bbox()
+
+
+if __name__ == '__main__':
+    unittest.main()

lib/python/pygrass/vector/testsuite/test_vector3d.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Jun 18 17:21:42 2014
+
+@author: pietro
+"""
+import unittest
+import numpy as np
+
+from grass.script.core import run_command
+
+from grass.pygrass.vector import VectorTopo
+from grass.pygrass.vector.geometry import Point
+from grass.pygrass.gis.region import Region
+from grass.pygrass.functions import get_mapset_vector
+
+
+def generate_coordinates(number, bbox=None, with_z=False):
+    """Return 2 or 3 random arrays of coordinates"""
+    bbox = Region() if bbox is None else bbox
+    x = bbox.south + (bbox.north - bbox.south) * np.random.random(number)
+    y = bbox.west + (bbox.east - bbox.west) * np.random.random(number)
+    if with_z:
+        z = np.random.random(number) * 1000
+        return x, y, z
+    return x, y
+
+
+class VectorTopo3DTestCase(unittest.TestCase):
+
+    npoints = 10
+    tmpname = "tmp_vect3d"
+
+    @classmethod
+    def setUpClass(cls):
+        """Generate a number (NPOINTS) of random points"""
+        cls.x, cls.y, cls.z = generate_coordinates(cls.npoints, with_z=True)
+
+    def writing_points(self):
+        """Write the generated random points to a vector map"""
+        with VectorTopo(self.tmpname, mode="w", with_z=True) as vect:
+            for x, y, z in zip(self.x, self.y, self.z):
+                vect.write(Point(x, y, z))
+
+    def reading_points(self):
+        """Read the generated random points from a vector map"""
+        with VectorTopo(self.tmpname, mode="r") as vect:
+            # reading the generated vector points map
+            arr = np.array([(p.x, p.y, p.z) for p in vect])
+            # verify the correspondance
+            for i, coords in enumerate((self.x, self.y, self.z)):
+                np.testing.assert_almost_equal(arr.T[i], coords)
+
+    def test_writing_reading_points(self):
+        self.writing_points()
+        self.reading_points()
+
+    @classmethod
+    def tearDownClass(cls):
+        """Remove the generated vector map, if exist"""
+        mset = get_mapset_vector(cls.tmpname, mapset='')
+        if mset:
+            run_command("g.remove", vect="%s@%s" % (cls.tmpname, mset))
+
+
+if __name__ == '__main__':
+    unittest.main()