added comparison of grid points approximately using a sorted set

Author: yucongalicechen

src/diffpy/labpdfproc/tests/test_functions.py

@@ -2,21 +2,17 @@
 
 from diffpy.labpdfproc.functions import Gridded_circle
 
-# Define test parameters
 params1 = [
     ([0.5, 3, 1], {(0.0, -0.5), (0.0, 0.0), (0.5, 0.0), (-0.5, 0.0), (0.0, 0.5)}),
     ([1, 4, 1], {(-0.333333, -0.333333), (0.333333, -0.333333), (-0.333333, 0.333333), (0.333333, 0.333333)}),
 ]
 
 
-# Define the test function
 @pytest.mark.parametrize("inputs, expected", params1)
 def test_get_grid_points(inputs, expected):
     expected_grid = expected
     actual_gs = Gridded_circle(radius=inputs[0], n_points_on_diameter=inputs[1], mu=inputs[2])
-    assert actual_gs.grid == expected_grid
-
-
-#    assert actual_gs.grid == pytest.approx(expected_grid)
-# for actual_point, expected_point in zip(actual_grid_sorted, expected_grid_sorted):
-#     assert actual_point == pytest.approx(expected_point, rel=1e-4, abs=1e-6)
+    actual_grid_sorted = sorted(actual_gs.grid)
+    expected_grid_sorted = sorted(expected_grid)
+    for actual_point, expected_point in zip(actual_grid_sorted, expected_grid_sorted):
+        assert actual_point == pytest.approx(expected_point, rel=1e-4, abs=1e-6)