Tweaks to get all tests passing

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

diff --git a/auto_tests/tests/Util.js b/auto_tests/tests/Util.js
index 1fce3a0..7c1eaa6 100644 (file)
--- a/auto_tests/tests/Util.js
+++ b/auto_tests/tests/Util.js
@@ -16,7 +16,7 @@ Util.getYLabels = function(axis_num, parent) {
   var y_labels = parent.getElementsByClassName("dygraph-axis-label-y" + axis_num);
   var ary = [];
   for (var i = 0; i < y_labels.length; i++) {
-    ary.push(y_labels[i].innerHTML);
+    ary.push(y_labels[i].innerHTML.replace(/&#160;|&nbsp;/g, ' '));
   }
   return ary;
 };
@@ -31,7 +31,7 @@ Util.getXLabels = function(parent) {
   var x_labels = parent.getElementsByClassName("dygraph-axis-label-x");
   var ary = [];
   for (var i = 0; i < x_labels.length; i++) {
-    ary.push(x_labels[i].innerHTML);
+    ary.push(x_labels[i].innerHTML.replace(/&#160;|&nbsp;/g, ' '));
   }
   return ary;
 };
@@ -54,28 +54,91 @@ Util.getClassTexts = function(css_class, parent) {
 Util.getLegend = function(parent) {
   parent = parent || document;
   var legend = parent.getElementsByClassName("dygraph-legend")[0];
-  return legend.textContent;
+  var re = new RegExp(String.fromCharCode(160), 'g');
+  return legend.textContent.replace(re, ' ');
 };
 
 /**
- * Assert that all the elements in 'parent' with class 'className' is
- * the expected font size.
+ * Assert that all elements have a certain style property.
  */
-Util.assertFontSizes = function(parent, className, expectedSize) {
-  var expectedSizePx = expectedSize + "px";
-  var labels = parent.getElementsByClassName(className);
-  assertTrue(labels.length > 0);
+Util.assertStyleOfChildren = function(selector, property, expectedValue) {
+  assert.isTrue(selector.length > 0);
+  for (var idx = 0; idx < selector.length; idx++) {
+    var child = selector[idx];
+    assert.equal(expectedValue, window.getComputedStyle(child)[property]);
+  }
+};
+
 
-  // window.getComputedStyle is apparently compatible with all browsers
-  // (IE first became compatible with IE9.)
-  // If this test fails on earlier browsers, then enable something like this,
-  // because the font size is set by the parent div.
-  // if (!window.getComputedStyle) {
-  //   fontSize = label.parentElement.style.fontSize;
-  // }
-  for (var idx = 0; idx < labels.length; idx++) {
-    var label = labels[idx];
-    var fontSize = window.getComputedStyle(label).fontSize;
-    assertEquals(expectedSizePx, fontSize);
+/**
+ * Takes in an array of strings and returns an array of floats.
+ */
+Util.makeNumbers = function(ary) {
+  var ret = [];
+  for (var i = 0; i < ary.length; i++) {
+    ret.push(parseFloat(ary[i]));
   }
+  return ret;
+};
+
+
+/**
+ * Sample a pixel from the canvas.
+ * Returns an [r, g, b, a] tuple where each values is in [0, 255].
+ */
+Util.samplePixel = function(canvas, x, y) {
+  var ctx = canvas.getContext("2d");  // bypasses Proxy if applied.
+
+  // TODO(danvk): Any performance issues with this?
+  var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
+
+  var scale = Dygraph.getContextPixelRatio(ctx);
+
+  var i = 4 * (x * scale + imageData.width * y * scale);
+  var d = imageData.data;
+  return [d[i], d[i+1], d[i+2], d[i+3]];
+};
+
+/**
+ * Overrides the browser's built-in XMLHttpRequest with a mock.
+ * Usage:
+ *
+ * var mockXhr = Util.overrideXMLHttpRequest(your_data);
+ * ... call code that does an XHR ...
+ * mockXhr.respond();  // restores default behavior.
+ * ... do your assertions ...
+ */
+Util.overrideXMLHttpRequest = function(data) {
+  var originalXMLHttpRequest = XMLHttpRequest;
+
+  var requests = [];
+  var FakeXMLHttpRequest = function () {
+    requests.push(this);
+  };
+  FakeXMLHttpRequest.prototype.open = function () {};
+  FakeXMLHttpRequest.prototype.send = function () {
+    this.readyState = 4;
+    this.status = 200;
+    this.responseText = data;
+  };
+  FakeXMLHttpRequest.restore = function() {
+    window.XMLHttpRequest = originalXMLHttpRequest;
+  };
+  FakeXMLHttpRequest.respond = function() {
+    for (var i = 0; i < requests.length; i++) {
+      requests[i].onreadystatechange();
+    }
+    FakeXMLHttpRequest.restore();
+  };
+  window.XMLHttpRequest = FakeXMLHttpRequest;
+  return FakeXMLHttpRequest;
+};
+
+/**
+ * Format a date as 2000/01/23
+ * @param {number} dateMillis Millis since epoch.
+ * @return {string} The date formatted as YYYY-MM-DD.
+ */
+Util.formatDate = function(dateMillis) {
+  return Dygraph.dateString_(dateMillis).slice(0, 10);  // 10 == "YYYY/MM/DD".length
 };