From 44477387f9e610d6d792bd06d0cd85d32d694752 Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <danvk@google.com>
Date: Thu, 16 Aug 2012 15:45:52 -0400
Subject: [PATCH] Fix issue 201:zero-series test broken

---
 auto_tests/tests/custom_bars.js | 18 ++++++++++++++++++
 dygraph.js                      |  3 ++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/auto_tests/tests/custom_bars.js b/auto_tests/tests/custom_bars.js
index e55b1c8..1e1b0c9 100644
--- a/auto_tests/tests/custom_bars.js
+++ b/auto_tests/tests/custom_bars.js
@@ -57,3 +57,21 @@ CustomBarsTestCase.prototype.testCustomBarsNoHang = function() {
   var graph = document.getElementById("graph");
   var g = new Dygraph(graph, data, opts);
 };
+
+// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=201
+CustomBarsTestCase.prototype.testCustomBarsZero = function() {
+  var opts = {
+    customBars: true
+  };
+  var data = "X,Y1,Y2\n" +
+"1,1;2;3,0;0;0\n" +
+"2,2;3;4,0;0;0\n" +
+"3,1;3;5,0;0;0\n";
+
+  var graph = document.getElementById("graph");
+  var g = new Dygraph(graph, data, opts);
+
+  var range = g.yAxisRange();
+  assertTrue('y-axis must include 0', range[0] <= 0);
+  assertTrue('y-axis must include 5', range[1] >= 5);
+};
diff --git a/dygraph.js b/dygraph.js
index c1764a1..471e4ee 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -2106,7 +2106,7 @@ Dygraph.prototype.extremeValues_ = function(series) {
     // With custom bars, maxY is the max of the high values.
     for (j = 0; j < series.length; j++) {
       y = series[j][1][0];
-      if (!y) continue;
+      if (y === null || isNaN(y)) continue;
       var low = y - series[j][1][1];
       var high = y + series[j][1][2];
       if (low > y) low = y;    // this can happen with custom bars,
@@ -2355,6 +2355,7 @@ Dygraph.prototype.drawGraph_ = function() {
   }
 
   this.computeYAxisRanges_(extremes);
+  console.log(extremes);
   this.layout_.setYAxes(this.axes_);
 
   this.addXTicks_();
-- 
2.7.4