W3C Test: import web-platform-tests/html/rendering

LayoutTests/imported/web-platform-tests/html/rendering/replaced-elements/svg-embedded-sizing/svg-embedded-sizing.js

+// global async_test, assert_equals
+//
+// This test generates a couple of scenarios (each a
+// SVGSizing.TestData) for sizing inline <svg> and uses a simple
+// JavaScript sizing implementation for comparison.
+//
+// The tests loops through different combinations of:
+//
+// * width and height on <object>, <iframe> (input dependent)
+//
+// * width and height on <svg>
+//
+// * viewBox on <svg> (gives intrinsic ratio)
+//
+// * width and height on containing block of <object>
+//
+// All these contribute to the final size of the SVG in some way.
+//
+// The test focuses on the size of the CSS box generated by the SVG.
+// The SVG is always empty by itself so no actual SVG are tested.
+// Little focus is put on variations within an attribute that doesn't
+// affect the sizing behavior.
+//
+// To debug a specific test, append ?<test-id> to the URL. An <iframe>
+// is generated with equivalent test and the source code of the test
+// can be downloaded.
+
+var debugHint = function(id) { return "(append ?"+id+" to debug) "; };
+var testSingleId;
+if (window.location.search) {
+    testSingleId = parseInt(window.location.search.substring(1));
+    debugHint = function(id) { return ""; };
+}
+
+function testPlaceholderWithHeight(placeholder,
+                                   placeholderHeightAttr) {
+    var testContainer = document.querySelector('#testContainer');
+    var outerWidth = testContainer.getBoundingClientRect().width;
+    var outerHeight = testContainer.getBoundingClientRect().height;
+
+    SVGSizing.doCombinationTest(
+        [["placeholder", [ placeholder ]],
+         ["containerWidthStyle", [null, "400px"]],
+         ["containerHeightStyle", [null, "400px"]],
+         ["placeholderWidthAttr", [null, "100", "50%"]],
+         ["placeholderHeightAttr", [placeholderHeightAttr]],
+         ["svgViewBoxAttr", [ null, "0 0 100 200" ]],
+         ["svgWidthAttr", [ null, "200", "25%" ]],
+         ["svgHeightAttr", [ null, "200", "25%" ]]],
+        function (config, id, cont) {
+            var testData = new SVGSizing.TestData(config);
+            var t = async_test(testData.name);
+            var expectedRect =
+                    testData.computeInlineReplacedSize(outerWidth, outerHeight);
+            var placeholder = testData.buildSVGOrPlaceholder();
+            var container =
+                    testData.buildContainer(placeholder);
+
+            var checkSize = function() {
+                var placeholderRect =
+                        placeholder.getBoundingClientRect();
+
+                try {
+                    assert_equals(placeholderRect.width,
+                                  expectedRect.width,
+                                  debugHint(id) + "Wrong width");
+                    assert_equals(placeholderRect.height,
+                                  expectedRect.height,
+                                  debugHint(id) + "Wrong height");
+                } finally {
+                    testContainer.removeChild(container);
+                    if (testSingleId)
+                        document.body.removeChild(testContainer);
+                    cont(id+1);
+                }
+                t.done();
+            };
+
+            if (!config.placeholder) {
+                testContainer.appendChild(container);
+                test(checkSize, testData.name);
+            } else {
+                t.step(function() {
+                    placeholder.addEventListener('load', function() {
+                        // setTimeout is a work-around to let engines
+                        // finish layout of child browsing contexts even
+                        // after the load event
+                        setTimeout(t.step_func(checkSize), 0);
+                    });
+                    testContainer.appendChild(container);
+                });
+            }
+            if (testSingleId == id)
+                testData.buildDemo(expectedRect, id);
+        }, testSingleId);
+}