Add test for DualMap

Author: Conengmo

tests/plugins/test_dual_map.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+
+"""
+Test DualMap
+------------
+"""
+
+from __future__ import (absolute_import, division, print_function)
+
+from jinja2 import Template
+
+import folium
+import folium.plugins
+
+
+def test_dual_map():
+    m = folium.plugins.DualMap((0, 0))
+
+    folium.FeatureGroup(name='both').add_to(m)
+    folium.FeatureGroup(name='left').add_to(m.m1)
+    folium.FeatureGroup(name='right').add_to(m.m2)
+
+    figure = m.get_root()
+    assert isinstance(figure, folium.Figure)
+    out = figure.render()
+
+    script = '<script src="https://rawcdn.githack.com/jieter/Leaflet.Sync/master/L.Map.Sync.js"></script>'  # noqa
+    assert script in out
+
+    tmpl = Template("""
+        {{ this.m1.get_name() }}.sync({{ this.m2.get_name() }});
+        {{ this.m2.get_name() }}.sync({{ this.m1.get_name() }});
+    """)
+
+    assert tmpl.render(this=m) in out