Test case for python bindings.

tests/visual_tests/test_python.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+import mapnik
+import sys
+
+class MyText(mapnik.FormatingNode):
+    def __init__(self):
+        mapnik.FormatingNode.__init__(self)
+        self.expr = mapnik.Expression("[name]")
+
+    def apply(self, properties, feature, output):
+        colors = [mapnik.Color('red'), 
+                  mapnik.Color('green'), 
+                  mapnik.Color('blue')]
+        text = "Test" #self.expr.evaluate(feature)
+        i = 0
+        my_properties = properties #mapnik.CharProperties(properties)
+        for char in text:
+            my_properties.fill = colors[i % len(colors)]
+            output.append(my_properties, char)
+            i += 1
+
+m = mapnik.Map(600,300)
+m.background = mapnik.Color('white')
+
+text = mapnik.TextSymbolizer()
+text.face_name = 'DejaVu Sans Book'
+
+point = mapnik.PointSymbolizer()
+
+rule = mapnik.Rule() 
+rule.symbols.append(text)
+rule.symbols.append(point)
+
+style = mapnik.Style() 
+style.rules.append(rule)
+
+m.append_style('Style', style)
+
+
+layer = mapnik.Layer('Layer')
+layer.datasource = mapnik.Shapefile(file="points.shp")
+layer.styles.append('Style')
+m.layers.append(layer)
+
+m.zoom_all()
+
+
+format_trees = [
+    ('TextNode', mapnik.FormatingTextNode(mapnik.Expression("[name]"))),
+    ('MyText', MyText())
+]
+
+for format_tree in format_trees:
+    text.placements.defaults.format_tree = format_tree[1]
+    mapnik.render_to_file(m, 'python-%s.png' % format_tree[0], 'png')