One more case in which ticks across DST boundaries are still broken

[dygraphs.git] / auto_tests / tests / axis_labels.js

diff --git a/auto_tests/tests/axis_labels.js b/auto_tests/tests/axis_labels.js
index 787a3c3..c95f35a 100644 (file)
--- a/auto_tests/tests/axis_labels.js
+++ b/auto_tests/tests/axis_labels.js
@@ -728,7 +728,7 @@ AxisLabelsTestCase.prototype.testLabelFormatterOverridesLabelsKMB = function() {
  * This test shows that you can override labelsKMB on the axis level.
  */
 AxisLabelsTestCase.prototype.testLabelsKMBIgnoredWhenOverridden = function() {
-  g = new Dygraph(
+  var g = new Dygraph(
       document.getElementById("graph"),
       "x,a,b\n" +
       "1,0,2000\n" +
@@ -750,3 +750,80 @@ AxisLabelsTestCase.prototype.testLabelsKMBIgnoredWhenOverridden = function() {
   assertEquals(["0","500","1K","1.5K","2K"], Util.getYLabels(1));
   assertEquals(["0","500","1000","1500","2000"], Util.getYLabels(2));
 };
+
+// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=147
+// Checks that axis labels stay sane across a DST change.
+AxisLabelsTestCase.prototype.testLabelsCrossDstChange = function() {
+  // (From tests/daylight-savings.html)
+  var g = new Dygraph(
+      document.getElementById("graph"),
+      "Date/Time,Purchases\n" +
+      "2010-11-05 00:00:00,167082\n" +
+      "2010-11-06 00:00:00,168571\n" +
+      "2010-11-07 00:00:00,177796\n" +
+      "2010-11-08 00:00:00,165587\n" +
+      "2010-11-09 00:00:00,164380\n",
+      { width: 1024 }
+      );
+
+  // Dates and "nice" hours: 6AM/PM and noon, not 5AM/11AM/...
+  var okLabels = {
+    '05Nov': true,
+    '06Nov': true,
+    '07Nov': true,
+    '08Nov': true,
+    '09Nov': true,
+    '06:00': true,
+    '12:00': true,
+    '18:00': true
+  };
+
+  var xLabels = Util.getXLabels();
+  for (var i = 0; i < xLabels.length; i++) {
+    assertTrue(okLabels[xLabels[i]]);
+  }
+
+  // This range had issues of its own on tests/daylight-savings.html.
+  g.updateOptions({
+    dateWindow: [1289109997722.8127, 1289261208937.7659]
+  });
+  xLabels = Util.getXLabels();
+  for (var i = 0; i < xLabels.length; i++) {
+    assertTrue(okLabels[xLabels[i]]);
+  }
+};
+
+
+// Tests data which crosses a "fall back" at a high enough frequency that you
+// can see both 1:00 A.M.s.
+AxisLabelsTestCase.prototype.testLabelsCrossDstChangeHighFreq = function() {
+  // Generate data which crosses the EST/EDT boundary.
+  var dst_data = [];
+  var base_ms = 1383454200000;
+  for (var x = base_ms; x < base_ms + 1000 * 60 * 80; x += 1000) {
+    dst_data.push([new Date(x), x]);
+  }
+
+  var g = new Dygraph(
+          document.getElementById("graph"),
+          dst_data,
+      { width: 1024, labels: ['Date', 'Value'] }
+      );
+
+  assertEquals([
+    '00:50', '00:55',
+    '01:00', '01:05', '01:10', '01:15', '01:20', '01:25',
+    '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
+    '01:00', '01:05'  // 1 AM number two!
+  ], Util.getXLabels());
+
+  // Now zoom past the initial 1 AM. This used to cause trouble.
+  g.updateOptions({
+    dateWindow: [1383454200000 + 15*60*1000, g.xAxisExtremes()[1]]}
+  );
+  assertEquals([
+    '01:05', '01:10', '01:15', '01:20', '01:25',
+    '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
+    '01:00', '01:05'  // 1 AM number two!
+  ], Util.getXLabels());
+};