X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=auto_tests%2Ftests%2Fstacked.js;h=e365c583f0e73fcfe3b56af8d378f5e20e8dfabb;hb=c432a749fa6d9dba4dbdf25e4e56935b91f5a984;hp=b0ad49264695e135bbabe1f86819ea49824c4889;hpb=277f6bfc262687d7f90152d496177c777e945306;p=dygraphs.git

diff --git a/auto_tests/tests/stacked.js b/auto_tests/tests/stacked.js
index b0ad492..e365c58 100644
--- a/auto_tests/tests/stacked.js
+++ b/auto_tests/tests/stacked.js
@@ -155,3 +155,27 @@ stackedTestCase.prototype.testNullValues = function() {
   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());
+};