X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=auto_tests%2Ftests%2Fcallback.js;h=a727fa5b16b06f0230a8b9324c4e340dfd971223;hb=ba6974629b86abd59888c2252c454a5de49fbc79;hp=e44e3971881427bc0f3735f1e0d1225e35792d14;hpb=870a309c8d693930baa69dd3b354d249d63b3307;p=dygraphs.git

diff --git a/auto_tests/tests/callback.js b/auto_tests/tests/callback.js
index e44e397..a727fa5 100644
--- a/auto_tests/tests/callback.js
+++ b/auto_tests/tests/callback.js
@@ -565,3 +565,49 @@ CallbackTestCase.prototype.testHighlightCallbackRow = function() {
   assertEquals(2, highlightRow);
   assertEquals('2: Y: 3 Z: 4', Util.getLegend());
 };
+
+/**
+ * Test that underlay callback is called even when there are no series,
+ * and that the y axis ranges are not NaN.
+ */
+CallbackTestCase.prototype.underlayCallback_noSeries = function() {
+  var called = false;
+  var yMin, yMax;
+
+  var callback = function(canvas, area, g) {
+    called = true;
+    yMin = g.yAxisRange(0)[0];
+    yMax = g.yAxisRange(0)[1];
+  };
+
+  var graph = document.getElementById("graph");
+  var g = new Dygraph(graph, "\n", {
+      underlayCallback: callback
+    });
+
+  assertTrue(called);
+  assertFalse(isNaN(yMin));
+  assertFalse(isNaN(yMax));
+};
+
+/**
+ * Test that underlay callback receives the correct y-axis range.
+ */
+CallbackTestCase.prototype.underlayCallback_yAxisRange = function() {
+  var called = false;
+  var yMin, yMax;
+
+  var callback = function(canvas, area, g) {
+    yMin = g.yAxisRange(0)[0];
+    yMax = g.yAxisRange(0)[1];
+  };
+
+  var graph = document.getElementById("graph");
+  var g = new Dygraph(graph, "\n", {
+      valueRange: [0,10],
+      underlayCallback: callback
+    });
+
+  assertEquals(0, yMin);
+  assertEquals(10, yMax);
+};