The Tor Browser: comparison dom/imptests/editing/selecttest/test

--1:000000000000
+:4d941e4d6a7a
+<!doctype html>
+<title>Selection extend() tests</title>
+<meta charset=utf-8>
+<body>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+<div id=log></div>
+<script>
+"use strict";
+// Also test a selection with no ranges
+testRanges.unshift("[]");
+/**
+* We test Selections that go both forwards and backwards here.  In the latter
+* case we need to use extend() to force it to go backwards, which is fair
+* enough, since that's what we're testing.  We test collapsed selections only
+* once.
+*/
+for (var i = 0; i < testRanges.length; i++) {
+	var endpoints = eval(testRanges[i]);
+	for (var j = 0; j < testPoints.length; j++) {
+		if (endpoints[0] == endpoints[2]
+		&& endpoints[1] == endpoints[3]) {
+			// Test collapsed selections only once
+			test(function() {
+				setSelectionForwards(endpoints);
+				testExtend(endpoints, eval(testPoints[j]));
+			}, "extend() with range " + i + " " + testRanges[i]
+			+ " and point " + j + " " + testPoints[j]);
+		} else {
+			test(function() {
+				setSelectionForwards(endpoints);
+				testExtend(endpoints, eval(testPoints[j]));
+			}, "extend() forwards with range " + i + " " + testRanges[i]
+			+ " and point " + j + " " + testPoints[j]);
+			test(function() {
+				setSelectionBackwards(endpoints);
+				testExtend(endpoints, eval(testPoints[j]));
+			}, "extend() backwards with range " + i + " " + testRanges[i]
+			+ " and point " + j + " " + testPoints[j]);
+		}
+	}
+}
+function testExtend(endpoints, target) {
+	assert_equals(getSelection().rangeCount, endpoints.length/4,
+		"Sanity check: rangeCount must be correct");
+	var node = target[0];
+	var offset = target[1];
+	// "If the context object's range is null, throw an InvalidStateError
+	// exception and abort these steps."
+	if (getSelection().rangeCount == 0) {
+		assert_throws("INVALID_STATE_ERR", function() {
+			selection.extend(node, offset);
+		}, "extend() when rangeCount is 0 must throw InvalidStateError");
+		return;
+	}
+	assert_equals(getSelection().getRangeAt(0).startContainer, endpoints[0],
+		"Sanity check: startContainer must be correct");
+	assert_equals(getSelection().getRangeAt(0).startOffset, endpoints[1],
+		"Sanity check: startOffset must be correct");
+	assert_equals(getSelection().getRangeAt(0).endContainer, endpoints[2],
+		"Sanity check: endContainer must be correct");
+	assert_equals(getSelection().getRangeAt(0).endOffset, endpoints[3],
+		"Sanity check: endOffset must be correct");
+	// "Let anchor and focus be the context object's anchor and focus, and let
+	// new focus be the boundary point (node, offset)."
+	var anchorNode = getSelection().anchorNode;
+	var anchorOffset = getSelection().anchorOffset;
+	var focusNode = getSelection().focusNode;
+	var focusOffset = getSelection().focusOffset;
+	// "Let new range be a new range."
+	//
+	// We'll always be setting either new range's start or its end to new
+	// focus, so we'll always throw at some point.  Test that now.
+	//
+	// From DOM4's "set the start or end of a range": "If node is a doctype,
+	// throw an "InvalidNodeTypeError" exception and terminate these steps."
+	if (node.nodeType == Node.DOCUMENT_TYPE_NODE) {
+		assert_throws("INVALID_NODE_TYPE_ERR", function() {
+			selection.extend(node, offset);
+		}, "extend() to a doctype must throw InvalidNodeTypeError");
+		return;
+	}
+	// From DOM4's "set the start or end of a range": "If offset is greater
+	// than node's length, throw an "IndexSizeError" exception and terminate
+	// these steps."
+	//
+	// FIXME: We should be casting offset to an unsigned int per WebIDL.  Until
+	// we do, we need the offset < 0 check too.
+	if (offset < 0 || offset > getNodeLength(node)) {
+		assert_throws("INDEX_SIZE_ERR", function() {
+			selection.extend(node, offset);
+		}, "extend() to an offset that's greater than node length (" + getNodeLength(node) + ") must throw IndexSizeError");
+		return;
+	}
+	// Now back to the editing spec.
+	var originalRange = getSelection().getRangeAt(0);
+	// "If node's root is not the same as the context object's range's root,
+	// set new range's start and end to (node, offset)."
+	//
+	// "Otherwise, if anchor is before or equal to new focus, set new range's
+	// start to anchor, then set its end to new focus."
+	//
+	// "Otherwise, set new range's start to new focus, then set its end to
+	// anchor."
+	//
+	// "Set the context object's range to new range."
+	//
+	// "If new focus is before anchor, set the context object's direction to
+	// backwards. Otherwise, set it to forwards."
+	//
+	// The upshot of all these is summed up by just testing the anchor and
+	// offset.
+	getSelection().extend(node, offset);
+	if (furthestAncestor(anchorNode) == furthestAncestor(node)) {
+		assert_equals(getSelection().anchorNode, anchorNode,
+			"anchorNode must not change if the node passed to extend() has the same root as the original range");
+		assert_equals(getSelection().anchorOffset, anchorOffset,
+			"anchorOffset must not change if the node passed to extend() has the same root as the original range");
+	} else {
+		assert_equals(getSelection().anchorNode, node,
+			"anchorNode must be the node passed to extend() if it has a different root from the original range");
+		assert_equals(getSelection().anchorOffset, offset,
+			"anchorOffset must be the offset passed to extend() if the node has a different root from the original range");
+	}
+	assert_equals(getSelection().focusNode, node,
+		"focusNode must be the node passed to extend()");
+	assert_equals(getSelection().focusOffset, offset,
+		"focusOffset must be the offset passed to extend()");
+	assert_not_equals(getSelection().getRangeAt(0), originalRange,
+		"extend() must replace any existing range with a new one, not mutate the existing one");
+}
+testDiv.style.display = "none";
+</script>

The Tor Browser / file comparison

comparison: dom/imptests/editing/selecttest/test_extend.html

dom/imptests/editing/selecttest/test_extend.html