def test_1(self):
        sym = self.lines_layer.rendererV2().symbol()
        sym_layer = QgsArrowSymbolLayer.create({'head_size': '6.5'})
        dd = QgsDataDefined("(@geometry_point_num % 4) * 2")
        sym_layer.setDataDefinedProperty("arrow_width", dd)
        dd2 = QgsDataDefined("(@geometry_point_num % 4) * 2")
        sym_layer.setDataDefinedProperty("head_size", dd2)
        fill_sym = QgsFillSymbolV2.createSimple({'color': '#8bcfff', 'outline_color': '#000000', 'outline_style': 'solid', 'outline_width': '1'})
        sym_layer.setSubSymbol(fill_sym)
        sym.changeSymbolLayer(0, sym_layer)

        rendered_layers = [self.lines_layer.id()]
        self.mapsettings.setLayers(rendered_layers)

        renderchecker = QgsMultiRenderChecker()
        renderchecker.setMapSettings(self.mapsettings)
        renderchecker.setControlName('expected_arrowsymbollayer_1')
        self.assertTrue(renderchecker.runTest('arrowsymbollayer_1'))

    def test_unrepeated(self):
        sym = self.lines_layer.rendererV2().symbol()
        # double headed
        sym_layer = QgsArrowSymbolLayer.create({'arrow_width': '7', 'head_length': '6', 'head_thickness': '8', 'head_type': '0', 'arrow_type': '0'})
        # no repetition
        sym_layer.setIsRepeated(False)
        fill_sym = QgsFillSymbolV2.createSimple({'color': '#8bcfff', 'outline_color': '#000000', 'outline_style': 'solid', 'outline_width': '1'})
        sym_layer.setSubSymbol(fill_sym)
        sym.changeSymbolLayer(0, sym_layer)

        rendered_layers = [self.lines_layer.id()]
        self.mapsettings.setLayers(rendered_layers)

        renderchecker = QgsMultiRenderChecker()
        ms = self.mapsettings
        ms.setExtent(QgsRectangle(-119, 17, -82, 50))
        renderchecker.setMapSettings(ms)
        renderchecker.setControlName('expected_arrowsymbollayer_4')
        self.assertTrue(renderchecker.runTest('arrowsymbollayer_4'))