<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=932937
-->
<head>
  <meta charset="utf-8">
  <title>Test for Bug 932937</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
  <script type="application/javascript" src="inspector-helpers.js"></script>
  <script type="application/javascript">
"use strict";

window.onload = function() {
  SimpleTest.waitForExplicitFinish();
  runNextTest();
};

let gWalker = null;

addTest(async function setup() {
  const url = document.getElementById("inspectorContent").href;
  const { target } = await attachURL(url);
  const inspector = await target.getFront("inspector");
  gWalker = inspector.walker;
  runNextTest();
});

addTest(async function testLargeImage() {
  // Select the image node from the test page
  const img = await gWalker.querySelector(gWalker.rootNode, ".big-horizontal");
  ok(img, "Image node found in the test page");
  ok(img.getImageData, "Image node has the getImageData function");
  const imageData = await img.getImageData(100);
  ok(imageData.data, "Image data actor was sent back");
  ok(imageData.size, "Image size info was sent back too");
  is(imageData.size.naturalWidth, 5333, "Natural width of the image correct");
  is(imageData.size.naturalHeight, 3000, "Natural width of the image correct");
  ok(imageData.size.resized, "Image was resized");
  const str = await imageData.data.string();
  ok(str, "We have an image data string!");
  testResizing(imageData, str);
});

addTest(async function testLargeCanvas() {
  // Select the canvas node from the test page
  const canvas = await gWalker.querySelector(gWalker.rootNode, ".big-vertical");
  ok(canvas, "Image node found in the test page");
  ok(canvas.getImageData, "Image node has the getImageData function");
  const imageData = await canvas.getImageData(350);
  ok(imageData.data, "Image data actor was sent back");
  ok(imageData.size, "Image size info was sent back too");
  is(imageData.size.naturalWidth, 1000, "Natural width of the image correct");
  is(imageData.size.naturalHeight, 2000, "Natural width of the image correct");
  ok(imageData.size.resized, "Image was resized");
  const str = await imageData.data.string();
  ok(str, "We have an image data string!");
  testResizing(imageData, str);
});

addTest(async function testSmallImage() {
  // Select the small image node from the test page
  const img = await gWalker.querySelector(gWalker.rootNode, ".small");
  ok(img, "Image node found in the test page");
  ok(img.getImageData, "Image node has the getImageData function");
  const imageData = await img.getImageData();
  ok(imageData.data, "Image data actor was sent back");
  ok(imageData.size, "Image size info was sent back too");
  is(imageData.size.naturalWidth, 245, "Natural width of the image correct");
  is(imageData.size.naturalHeight, 240, "Natural width of the image correct");
  ok(!imageData.size.resized, "Image was NOT resized");
  const str = await imageData.data.string();
  ok(str, "We have an image data string!");
  testResizing(imageData, str);
});

addTest(async function testDataImage() {
  // Select the data image node from the test page
  const img = await gWalker.querySelector(gWalker.rootNode, ".data");
  ok(img, "Image node found in the test page");
  ok(img.getImageData, "Image node has the getImageData function");
  const imageData = await img.getImageData(14);
  ok(imageData.data, "Image data actor was sent back");
  ok(imageData.size, "Image size info was sent back too");
  is(imageData.size.naturalWidth, 28, "Natural width of the image correct");
  is(imageData.size.naturalHeight, 28, "Natural width of the image correct");
  ok(imageData.size.resized, "Image was resized");
  const str = await imageData.data.string();
  ok(str, "We have an image data string!");
  testResizing(imageData, str);
});

addTest(async function testNonImgOrCanvasElements() {
  const body = await gWalker.querySelector(gWalker.rootNode, "body");
  await ensureRejects(body.getImageData(), "Invalid element");
  runNextTest();
});

addTest(function cleanup() {
  gWalker = null;
  runNextTest();
});

/**
 * Checks if the server told the truth about resizing the image
 */
function testResizing(imageData, str) {
  const img = document.createElement("img");
  img.addEventListener("load", () => {
    const resized = !(img.naturalWidth == imageData.size.naturalWidth &&
                    img.naturalHeight == imageData.size.naturalHeight);
    is(imageData.size.resized, resized, "Server told the truth about resizing");
    runNextTest();
  });
  img.src = str;
}

/**
 * Asserts that the given promise rejects.
 */
function ensureRejects(promise, desc) {
  return promise.then(() => {
    ok(false, desc + ": promise resolved unexpectedly.");
  }, () => {
    ok(true, desc + ": promise rejected as expected.");
  });
}
  </script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=932937">Mozilla Bug 932937</a>
<a id="inspectorContent" target="_blank" href="inspector_getImageData.html">Test Document</a>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
</pre>
</body>
</html>
