Add unit test for the MapLayers class

tests/layer_tests.py

@@ -0,0 +1,75 @@
+import unittest
+import io
+from configobj import ConfigObj
+from unittest.mock import MagicMock
+
+from core.layers import MapLayer, MapLayerGroup
+
+MAP_CONFIG = """
+revision=1
+[layers]
+
+## OpenStreetMap layers
+
+[[mapnik]]
+  label=Mapnik (default)
+  url="http://c.tile.openstreetmap.org/"
+  type=png
+  max_zoom=18
+  min_zoom=0
+  folder_prefix=OpenStreetMap I
+  coordinates=osm
+  group="osm"
+  icon="mapnik"
+  timeout=240.5
+
+[[osm_landscape]]
+  label=Landscape
+  url="http://b.tile3.opencyclemap.org/landscape/"
+  type=png
+  max_zoom=18
+  min_zoom=0
+  folder_prefix=osm_landscape
+  coordinates=osm
+  group="osm"
+
+[groups]
+
+[[osm]]
+  label="OpenStreetMap"
+  icon="osm_icon"
+"""
+
+config = ConfigObj(io.StringIO(MAP_CONFIG))
+
+class MapLayerTests(unittest.TestCase):
+
+    def layer_parsing_test(self):
+        """Check layer parsing works correctly."""
+        mapnik_config = config["layers"]["mapnik"]
+        layer = MapLayer(layerId="mapnik", config=mapnik_config)
+        self.assertEqual(layer.id, "mapnik")
+        self.assertEqual(layer.label, "Mapnik (default)")
+        self.assertEqual(layer.url, "http://c.tile.openstreetmap.org/")
+        self.assertEqual(layer.type, "png")
+        self.assertEqual(layer.max_zoom, 18)
+        self.assertEqual(layer.min_zoom, 0)
+        self.assertEqual(layer.folder_name, "OpenStreetMap I")
+        self.assertEqual(layer.group_id, "osm")
+        self.assertEqual(layer.icon, "mapnik")
+        self.assertEqual(layer.timeout, 240.5)
+
+        expected_dict = {
+            "id": "mapnik",
+            "label": "Mapnik (default)",
+            "url": "http://c.tile.openstreetmap.org/",
+            "type": "png",
+            "max_zoom": 18,
+            "min_zoom": 0,
+            "folder_name": "OpenStreetMap I",
+            "coordinates": "osm",
+            "group_id": "osm",
+            "icon": "mapnik",
+            "timeout": 240.5
+        }
+        self.assertDictEqual(layer.dict, expected_dict)