X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;ds=sidebyside;f=auto_tests%2Ftests%2FCanvasAssertions.js;h=4059a0aeee189614ef6fceb62dc4e9e2c9f9f24f;hb=ccb0001c3c8aadd02358995c8d7b71fbb37c0bc3;hp=6481c60ddb55e88c2a4df2f9a7098781662b3759;hpb=e26b71566419e1c051f3fbd1f4f8f64b063a04c9;p=dygraphs.git

diff --git a/auto_tests/tests/CanvasAssertions.js b/auto_tests/tests/CanvasAssertions.js
index 6481c60..4059a0a 100644
--- a/auto_tests/tests/CanvasAssertions.js
+++ b/auto_tests/tests/CanvasAssertions.js
@@ -86,6 +86,35 @@ CanvasAssertions.assertLineDrawn = function(proxy, p1, p2, attrs) {
 };
 
 /**
+ * Return the lines drawn with specific attributes.
+ *
+ * This merely looks for one of these four possibilities:
+ * moveTo(p1) -> lineTo(p2)
+ * moveTo(p2) -> lineTo(p1)
+ * lineTo(p1) -> lineTo(p2)
+ * lineTo(p2) -> lineTo(p1)
+ *
+ * attrs is meant to be used when you want to track things like
+ * color and stroke width.
+ */
+CanvasAssertions.getLinesDrawn = function(proxy) {
+  var lastCall;
+  var lines = [];
+  for (var i = 0; i < proxy.calls__.length; i++) {
+    var call = proxy.calls__[i];
+
+    if (call.name == "lineTo") {
+      if (lastCall != null) {
+        lines.push([lastCall, call]);
+      }
+    }
+
+    lastCall = (call.name === "lineTo" || call.name === "moveTo") ? call : null;
+  }
+  return lines;
+};
+
+/**
  * Verifies that every call to context.save() has a matching call to
  * context.restore().
  */