- // returns an (r, g, b, alpha) tuple for the pixel.
- // values are in [0, 255].
- var getPixel = function(imageData, x, y) {
- var i = 4 * (x + imageData.width * y);
- var d = imageData.data;
- return [d[i], d[i+1], d[i+2], d[i+3]];
- };
-
- assertEquals([0, 0, 255, 38], getPixel(imageData, 200, 75));
- assertEquals([0, 0, 255, 38], getPixel(imageData, 200, 125));
- assertEquals([0, 255, 0, 38], getPixel(imageData, 200, 175));
- assertEquals([0, 255, 0, 38], getPixel(imageData, 200, 225));
-}
+// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=392
+it('testRollingAveragePreservesNaNs', function() {
+ var graph = document.getElementById("graph");
+ var data =
+ [
+ [1, [null, null], [3,1]],
+ [2, [2, 1], [null, null]],
+ [3, [null, null], [5,1]],
+ [4, [4, 0.5], [null, null]],
+ [5, [null, null], [7,1]],
+ [6, [NaN, NaN], [null, null]],
+ [8, [8, 1], [null, null]],
+ [10, [10, 1], [null, null]]
+ ];
+ var g = new Dygraph(graph, data,
+ {
+ labels: ['x', 'A', 'B' ],
+ connectSeparatedPoints: true,
+ drawPoints: true,
+ errorBars: true
+ }
+ );
+
+ var in_series = g.dataHandler_.extractSeries(data, 1, g.attributes_);
+
+ assert.equal(null, in_series[4][1]);
+ assert.equal(null, in_series[4][2][0]);
+ assert.equal(null, in_series[4][2][1]);
+ assert(isNaN(in_series[5][1]));
+ assert(isNaN(in_series[5][2][0]));
+ assert(isNaN(in_series[5][2][1]));
+
+ var out_series = g.dataHandler_.rollingAverage(in_series, 1, g.attributes_);
+ assert(isNaN(out_series[5][1]));
+ assert(isNaN(out_series[5][2][0]));
+ assert(isNaN(out_series[5][2][1]));
+ assert.equal(null, out_series[4][1]);
+ assert.equal(null, out_series[4][2][0]);
+ assert.equal(null, out_series[4][2][1]);
+});
+
+});