michael@0: /* vim: set ts=2 et sw=2 tw=80: */
michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:    http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: // Tests that the spectrum color picker works correctly
michael@0: 
michael@0: const TEST_URI = "data:text/html;charset=utf-8,<div></div>";
michael@0: const {CSSTransformPreviewer} = devtools.require("devtools/shared/widgets/CSSTransformPreviewer");
michael@0: 
michael@0: let doc, root;
michael@0: 
michael@0: function test() {
michael@0:   waitForExplicitFinish();
michael@0:   addTab(TEST_URI, () => {
michael@0:     doc = content.document;
michael@0:     root = doc.querySelector("div");
michael@0:     startTests();
michael@0:   });
michael@0: }
michael@0: 
michael@0: function endTests() {
michael@0:   doc = root = null;
michael@0:   gBrowser.removeCurrentTab();
michael@0:   finish();
michael@0: }
michael@0: 
michael@0: function startTests() {
michael@0:   testCreateAndDestroyShouldAppendAndRemoveElements();
michael@0: }
michael@0: 
michael@0: function testCreateAndDestroyShouldAppendAndRemoveElements() {
michael@0:   ok(root, "We have the root node to append the preview to");
michael@0:   is(root.childElementCount, 0, "Root node is empty");
michael@0: 
michael@0:   let p = new CSSTransformPreviewer(root);
michael@0:   p.preview("matrix(1, -0.2, 0, 1, 0, 0)");
michael@0:   ok(root.childElementCount > 0, "Preview has appended elements");
michael@0:   ok(root.querySelector("canvas"), "Canvas preview element is here");
michael@0: 
michael@0:   p.destroy();
michael@0:   is(root.childElementCount, 0, "Destroying preview removed all nodes");
michael@0: 
michael@0:   testCanvasDimensionIsConstrainedByMaxDim();
michael@0: }
michael@0: 
michael@0: function testCanvasDimensionIsConstrainedByMaxDim() {
michael@0:   let p = new CSSTransformPreviewer(root);
michael@0:   p.MAX_DIM = 500;
michael@0:   p.preview("scale(1)", "center", 1000, 1000);
michael@0: 
michael@0:   let canvas = root.querySelector("canvas");
michael@0:   is(canvas.width, 500, "Canvas width is correct");
michael@0:   is(canvas.height, 500, "Canvas height is correct");
michael@0: 
michael@0:   p.destroy();
michael@0: 
michael@0:   testCallingPreviewSeveralTimesReusesTheSameCanvas();
michael@0: }
michael@0: 
michael@0: function testCallingPreviewSeveralTimesReusesTheSameCanvas() {
michael@0:   let p = new CSSTransformPreviewer(root);
michael@0: 
michael@0:   p.preview("scale(1)", "center", 1000, 1000);
michael@0:   let canvas = root.querySelector("canvas");
michael@0: 
michael@0:   p.preview("rotate(90deg)");
michael@0:   let canvases = root.querySelectorAll("canvas");
michael@0:   is(canvases.length, 1, "Still one canvas element");
michael@0:   is(canvases[0], canvas, "Still the same canvas element");
michael@0:   p.destroy();
michael@0: 
michael@0:   testCanvasDimensionAreCorrect();
michael@0: }
michael@0: 
michael@0: function testCanvasDimensionAreCorrect() {
michael@0:   // Only test a few simple transformations
michael@0:   let p = new CSSTransformPreviewer(root);
michael@0: 
michael@0:   // Make sure we have a square
michael@0:   let w = 200, h = w;
michael@0:   p.MAX_DIM = w;
michael@0: 
michael@0:   // We can't test the content of the canvas here, just that, given a max width
michael@0:   // the aspect ratio of the canvas seems correct.
michael@0: 
michael@0:   // Translate a square by its width, should be a rectangle
michael@0:   p.preview("translateX(200px)", "center", w, h);
michael@0:   let canvas = root.querySelector("canvas");
michael@0:   is(canvas.width, w, "width is correct");
michael@0:   is(canvas.height, h/2, "height is half of the width");
michael@0: 
michael@0:   // Rotate on the top right corner, should be a rectangle
michael@0:   p.preview("rotate(-90deg)", "top right", w, h);
michael@0:   is(canvas.width, w, "width is correct");
michael@0:   is(canvas.height, h/2, "height is half of the width");
michael@0: 
michael@0:   // Rotate on the bottom left corner, should be a rectangle
michael@0:   p.preview("rotate(90deg)", "top right", w, h);
michael@0:   is(canvas.width, w/2, "width is half of the height");
michael@0:   is(canvas.height, h, "height is correct");
michael@0: 
michael@0:   // Scale from center, should still be a square
michael@0:   p.preview("scale(2)", "center", w, h);
michael@0:   is(canvas.width, w, "width is correct");
michael@0:   is(canvas.height, h, "height is correct");
michael@0: 
michael@0:   // Skew from center, 45deg, should be a rectangle
michael@0:   p.preview("skew(45deg)", "center", w, h);
michael@0:   is(canvas.width, w, "width is correct");
michael@0:   is(canvas.height, h/2, "height is half of the height");
michael@0: 
michael@0:   p.destroy();
michael@0: 
michael@0:   testPreviewingInvalidTransformReturnsFalse();
michael@0: }
michael@0: 
michael@0: function testPreviewingInvalidTransformReturnsFalse() {
michael@0:   let p = new CSSTransformPreviewer(root);
michael@0:   ok(!p.preview("veryWow(muchPx) suchTransform(soDeg)"), "Returned false for invalid transform");
michael@0:   ok(!p.preview("rotae(3deg)"), "Returned false for invalid transform");
michael@0: 
michael@0:   // Verify the canvas is empty by checking the image data
michael@0:   let canvas = root.querySelector("canvas"), ctx = canvas.getContext("2d");
michael@0:   let data = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
michael@0:   for (let i = 0, n = data.length; i < n; i += 4) {
michael@0:     // Let's not log 250*250*4 asserts! Instead, just log when it fails
michael@0:     let red = data[i];
michael@0:     let green = data[i + 1];
michael@0:     let blue = data[i + 2];
michael@0:     let alpha = data[i + 3];
michael@0:     if (red !== 0 || green !== 0 || blue !== 0 || alpha !== 0) {
michael@0:       ok(false, "Image data is not empty after an invalid transformed was previewed");
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   is(p.preview("translateX(30px)"), true, "Returned true for a valid transform");
michael@0:   endTests();
michael@0: }