test: add unit tests for OffsetRadialAperture class methods

tests/test_physical_apertures.py

@@ -42,3 +42,62 @@ def test_from_dict(self):
         assert aperture.r_max == 5
         assert aperture.r_min == 2
         assert isinstance(aperture, physical_apertures.RadialAperture)
+
+
+class TestOffsetRadialAperture:
+    def test_clip(self):
+        aperture = physical_apertures.OffsetRadialAperture(
+            r_max=5, r_min=2, offset_x=1, offset_y=1
+        )
+        rays = RealRays([0, 1, 2, 3, 4, 5], [0, 1, 2, 3, 4, 5],
+                        [0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0],
+                        [0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1],
+                        [1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1])
+        aperture.clip(rays)
+        assert np.all(rays.i == [0, 0, 0, 1, 1, 0])
+
+    def test_scale(self):
+        aperture = physical_apertures.OffsetRadialAperture(
+            r_max=5, r_min=2, offset_x=1, offset_y=1
+        )
+        aperture.scale(2)
+        assert aperture.r_max == 10
+        assert aperture.r_min == 4
+        assert aperture.offset_x == 2
+        assert aperture.offset_y == 2
+
+        aperture = physical_apertures.OffsetRadialAperture(
+            r_max=5, r_min=2, offset_x=1, offset_y=1
+        )
+        aperture.scale(0.5)
+        assert aperture.r_max == 2.5
+        assert aperture.r_min == 1
+        assert aperture.offset_x == 0.5
+        assert aperture.offset_y == 0.5
+
+    def test_to_dict(self):
+        aperture = physical_apertures.OffsetRadialAperture(
+            r_max=5, r_min=2, offset_x=1, offset_y=1
+        )
+        assert aperture.to_dict() == {
+            'type': 'OffsetRadialAperture',
+            'r_max': 5,
+            'r_min': 2,
+            'offset_x': 1,
+            'offset_y': 1
+        }
+
+    def test_from_dict(self):
+        data = {
+            'type': 'OffsetRadialAperture',
+            'r_max': 5,
+            'r_min': 2,
+            'offset_x': 1,
+            'offset_y': 1
+        }
+        aperture = physical_apertures.OffsetRadialAperture.from_dict(data)
+        assert aperture.r_max == 5
+        assert aperture.r_min == 2
+        assert aperture.offset_x == 1
+        assert aperture.offset_y == 1
+        assert isinstance(aperture, physical_apertures.OffsetRadialAperture)