Fix 'No data' when the serie only contains Nones + add some tests

pygal/__init__.py

@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '0.12.1'
+__version__ = '0.12.2'
 import sys
 from pygal.config import Config
 from pygal.ghost import Ghost

pygal/graph/base.py

@@ -150,7 +150,7 @@ class BaseGraph(object):
 
     def _has_data(self):
         """Check if there is any data"""
-        return sum(map(len, map(lambda s: s.values, self.series))) != 0
+        return sum(map(len, map(lambda s: s.safe_values, self.series))) != 0
 
     def render(self, is_unicode):
         """Render the graph, and return the svg string"""

pygal/test/test_config.py

@@ -180,9 +180,9 @@ def test_logarithmic_small_scale():
 def test_human_readable():
     line = Line()
     line.add('_', [10 ** 4, 10 ** 5, 23 * 10 ** 4])
-    # q = line.render_pyquery()
-    # assert q(".axis.y text").map(texts) == map(
-        # str, range(20000, 240000, 20000))
+    q = line.render_pyquery()
+    assert q(".axis.y text").map(texts) == map(
+        str, map(float, range(20000, 240000, 20000)))
     line.human_readable = True
     q = line.render_pyquery()
     assert q(".axis.y text").map(texts) == map(

pygal/test/test_graph.py

@@ -93,14 +93,16 @@ def test_empty_lists(Chart):
     chart.add('B', [])
     chart.x_labels = ('red', 'green', 'blue')
     q = chart.render_pyquery()
-    assert len(q(".legend")) == 2
+    assert len(q(".legend")) == 1
 
+
+def test_empty_lists_with_nones(Chart):
     chart = Chart()
     chart.add('A', [None, None])
     chart.add('B', [None, 4, 4])
     chart.x_labels = ('red', 'green', 'blue')
     q = chart.render_pyquery()
-    assert len(q(".legend")) == 2
+    assert len(q(".legend")) == 1
 
 
 def test_non_iterable_value(Chart):
@@ -151,3 +153,46 @@ def test_values_by_dict(Chart):
     chart.x_labels = ('red', 'green', 'blue')
     chart2 = chart.render()
     assert chart1 == chart2
+
+
+def test_no_data_with_no_values(Chart):
+    chart = Chart()
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"
+
+
+def test_no_data_with_empty_serie(Chart):
+    chart = Chart()
+    chart.add('Serie', [])
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"
+
+
+def test_no_data_with_empty_series(Chart):
+    chart = Chart()
+    chart.add('Serie1', [])
+    chart.add('Serie2', [])
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"
+
+
+def test_no_data_with_none(Chart):
+    chart = Chart()
+    chart.add('Serie', None)
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"
+
+
+def test_no_data_with_list_of_none(Chart):
+    chart = Chart()
+    chart.add('Serie', [None])
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"
+
+
+def test_no_data_with_lists_of_nones(Chart):
+    chart = Chart()
+    chart.add('Serie1', [None, None, None, None])
+    chart.add('Serie2', [None, None, None])
+    q = chart.render_pyquery()
+    assert q("text").text() == "No data"

pygal/util.py

@@ -316,6 +316,8 @@ def prepare_values(raw, config, cls):
         else:
             raw_values = list(raw_values)
 
+        if not filter(lambda x: x is not None, raw_values):
+            continue
         for index, raw_value in enumerate(
                 raw_values + (
                     (width - len(raw_values)) * [None]  # aligning values