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<!doctype html>
<title>Selection extend() tests</title>
<meta charset=utf-8>
<meta name=timeout content=long>
<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>
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