Add tests that fails referencing #188

demo/moulinrouge/tests.py

@@ -8,6 +8,7 @@
 from pygal.colors import rotate
 from pygal.graph.frenchmap import DEPARTMENTS, REGIONS
 from random import randint, choice
+from datetime import datetime
 
 
 def get_test_routes(app):
@@ -218,6 +219,12 @@ def test_no_data_for(chart):
         graph.title = '123456789 ' * 30
         return graph.render_response()
 
+    @app.route('/test/datey_single')
+    def test_datey_single():
+        graph = DateY(interpolate='cubic')
+        graph.add('Single', [(datetime.now(), 1)])
+        return graph.render_response()
+
     @app.route('/test/no_data/at_all/<chart>')
     def test_no_data_at_all_for(chart):
         graph = CHARTS_BY_NAME[chart]()

pygal/test/test_graph.py

@@ -132,6 +132,31 @@ def test_empty_lists_with_nones(Chart):
     q = chart.render_pyquery()
     assert len(q(".legend")) == 2
 
+
+def test_only_one_value(Chart):
+    chart = Chart()
+    chart.add('S', [1])
+    chart.x_labels = ('single')
+    q = chart.render_pyquery()
+    assert len(q(".legend")) == 1
+
+
+def test_only_one_value_log(Chart):
+    chart = Chart(logarithmic=True)
+    chart.add('S', [1])
+    chart.x_labels = ('single')
+    q = chart.render_pyquery()
+    assert len(q(".legend")) == 1
+
+
+def test_only_one_value_intrp(Chart):
+    chart = Chart(interpolate='cubic')
+    chart.add('S', [1])
+    chart.x_labels = ('single')
+    q = chart.render_pyquery()
+    assert len(q(".legend")) == 1
+
+
 def test_non_iterable_value(Chart):
     chart = Chart(no_prefix=True)
     chart.add('A', 1)