assertEquals([0, 255, 0, 38], Util.samplePixel(g.hidden_, 200, 250));
assertEquals([0, 255, 0, 38], Util.samplePixel(g.hidden_, 317, 250));
}
+
+// Validates regression when null values in stacked graphs show up
+// incorrectly in the legend.
+stackedTestCase.prototype.testNullValues = function() {
+ var opts = {
+ stackedGraph: true,
+ stepPlot:true
+ };
+ var data = "X,Y1,Y2,Y3\n" +
+ "0,-5,-1,1\n" +
+ "1,1,,1\n" +
+ "2,1,2,3\n" +
+ "3,3,,4\n" +
+ "4,3,2,3\n"
+ ;
+
+ var graph = document.getElementById("graph");
+ g = new Dygraph(graph, data, opts);
+
+ g.setSelection(0);
+ assertEquals("0: Y1: -5 Y2: -1 Y3: 1", Util.getLegend());
+
+ g.setSelection(1);
+ assertEquals("1: Y1: 1 Y3: 1", Util.getLegend());
+
+ g.setSelection(2);
+ assertEquals("2: Y1: 1 Y2: 2 Y3: 3", Util.getLegend());
+
+ g.setSelection(3);
+ assertEquals("3: Y1: 3 Y3: 4", Util.getLegend());
+
+ g.setSelection(4);
+ assertEquals("4: Y1: 3 Y2: 2 Y3: 3", Util.getLegend());
+};
+
+// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=438
+stackedTestCase.prototype.testMissingValueAtZero = function() {
+ var opts = {
+ stackedGraph: true
+ };
+ var data = "X,Y1,Y2\n" +
+ "0,,1\n" +
+ "1,1,2\n" +
+ "2,,3\n"
+ ;
+
+ var graph = document.getElementById("graph");
+ g = new Dygraph(graph, data, opts);
+
+ g.setSelection(0);
+ assertEquals("0: Y2: 1", Util.getLegend());
+
+ g.setSelection(1);
+ assertEquals("1: Y1: 1 Y2: 2", Util.getLegend());
+
+ g.setSelection(2);
+ assertEquals("2: Y2: 3", Util.getLegend());
+};