Added ethnicity attribute ratio test.

tests/test_spawning.py

@@ -0,0 +1,25 @@
+from flee import flee, spawning
+from flee.datamanager import handle_refugee_data
+
+
+def test_get_attribute_ratio():
+    flee.SimulationSettings.ReadFromYML("empty.yml")
+
+    e = flee.Ecosystem()
+
+    l1 = e.addLocation(name="A", x=0.0, y=0.0, movechance=1.0, foreign=False)
+    l2 = e.addLocation(name="B", x=1.0, y=1.0, movechance=1.0, foreign=False)
+    l3 = e.addLocation(name="C", x=100.0, y=100.0, movechance=1.0, foreign=False)
+
+    e.linkUp(endpoint1="A", endpoint2="B", distance=100.0)
+    e.linkUp(endpoint1="B", endpoint2="C", distance=100.0)
+
+    # Insert refugee agents
+    for _ in range(0, 1):
+        e.addAgent(location=l1, attributes={})
+
+    l1.pop = 1000
+    l1.attributes["british"] = 20
+
+    assert spawning.getAttributeRatio(l1, "british") == 0.02
+