1 files changed, 39 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/element/pixel-manipulation/2d.imageData.object.readonly.html b/testing/web-platform/tests/html/canvas/element/pixel-manipulation/2d.imageData.object.readonly.html
new file mode 100644
index 0000000000..f002466bab
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/element/pixel-manipulation/2d.imageData.object.readonly.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.imageData.object.readonly</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
+<body class="show_output">
+
+<h1>2d.imageData.object.readonly</h1>
+<p class="desc">ImageData objects properties are read-only</p>
+
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
+
+<ul id="d"></ul>
+<script>
+var t = async_test("ImageData objects properties are read-only");
+_addTest(function(canvas, ctx) {
+
+  var imgdata = ctx.getImageData(0, 0, 10, 10);
+  var w = imgdata.width;
+  var h = imgdata.height;
+  var d = imgdata.data;
+  imgdata.width = 123;
+  imgdata.height = 123;
+  imgdata.data = [100,100,100,100];
+  _assertSame(imgdata.width, w, "imgdata.width", "w");
+  _assertSame(imgdata.height, h, "imgdata.height", "h");
+  _assertSame(imgdata.data, d, "imgdata.data", "d");
+  _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+  _assertSame(imgdata.data[1], 0, "imgdata.data[\""+(1)+"\"]", "0");
+  _assertSame(imgdata.data[2], 0, "imgdata.data[\""+(2)+"\"]", "0");
+  _assertSame(imgdata.data[3], 0, "imgdata.data[\""+(3)+"\"]", "0");
+
+});
+</script>
+