dom/imptests/editing/selecttest/test_getSelection.html
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 06 Sep 2013 10:09:52 +0900
changeset 145789 e197b9e71614f2af7805ecb1bb13d6ba6b56d1bf
parent 94302 835aaa090956253afd0f1dc0597fdf2809475bb1
permissions -rw-r--r--
Fixup for bug 912832 busting static analysis builds. r=me

<!doctype html>
<title>getSelection() tests</title>
<div id=log></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
"use strict";

// TODO: Figure out more places where defaultView is or is not guaranteed to be
// null, and test whether getSelection() is null.
//
// TODO: Figure out a good way to test display: none iframes.

test(function() {
	// Sanity checks like this are to flag known browser bugs with clearer
	// error messages, instead of throwing inscrutable exceptions.
	assert_true("Selection" in window,
		"Sanity check: window must have Selection property");

	assert_true(window.getSelection() instanceof Selection);
}, "window.getSelection() instanceof Selection");

test(function() {
	assert_equals(window.getSelection(), window.getSelection());
}, "window.getSelection() === window.getSelection()");

test(function() {
	assert_true("Selection" in window,
		"Sanity check: window must have Selection property");
	// This sanity check (which occurs a number of times below, too) is because
	// document.getSelection() is supposed to return null if defaultView is
	// null, so we need to figure out whether defaultView is null or not before
	// we can make correct assertions about getSelection().
	assert_not_equals(document.defaultView, null,
		"Sanity check: document.defaultView must not be null");

	assert_equals(typeof document.getSelection(), "object",
		"document.getSelection() must be an object");
	assert_true(document.getSelection() instanceof Selection);
}, "document.getSelection() instanceof Selection");

test(function() {
	assert_not_equals(document.defaultView, null,
		"Sanity check: document.defaultView must not be null");
	assert_equals(document.getSelection(), document.getSelection());
}, "document.getSelection() === document.getSelection()");

test(function() {
	assert_not_equals(document.defaultView, null,
		"Sanity check: document.defaultView must not be null");
	assert_equals(window.getSelection(), document.getSelection());
}, "window.getSelection() === document.getSelection()");

// "Each selection is associated with a single range, which may be null and is
// initially null."
//
// "The rangeCount attribute must return 0 if the context object's range is
// null, otherwise 1."
test(function() {
	assert_equals(window.getSelection().rangeCount, 0,
		"window.getSelection().rangeCount must initially be 0");
	assert_equals(typeof document.getSelection(), "object",
		"Sanity check: document.getSelection() must be an object");
	assert_equals(document.getSelection().rangeCount, 0,
		"document.getSelection().rangeCount must initially be 0");
}, "Selection's range must initially be null");

test(function() {
	var doc = document.implementation.createHTMLDocument("");
	assert_equals(doc.defaultView, null,
		"Sanity check: defaultView of created HTML document must be null");
	assert_equals(doc.getSelection(), null);
}, "getSelection() on HTML document with null defaultView must be null");

test(function() {
	var xmlDoc = document.implementation.createDocument(null, "", null);

	assert_true("getSelection" in xmlDoc, "XML document must have getSelection()");

	assert_equals(xmlDoc.defaultView, null,
		"Sanity check: defaultView of created XML document must be null");
	assert_equals(xmlDoc.getSelection(), null);
}, "getSelection() on XML document with null defaultView must be null");


// Run a bunch of iframe tests, once immediately after the iframe is appended
// to the document and once onload.  This makes a difference, because browsers
// differ (at the time of this writing) in whether they load about:blank in
// iframes synchronously or not.  Per the HTML spec, there must be a browsing
// context associated with the iframe as soon as it's appended to the document,
// so there should be a selection too.
var iframe = document.createElement("iframe");
add_completion_callback(function() {
	document.body.removeChild(iframe);
});

var testDescs = [];
var testFuncs = [];
testDescs.push("window.getSelection() instanceof Selection in an iframe");
testFuncs.push(function() {
	assert_true("Selection" in iframe.contentWindow,
		"Sanity check: window must have Selection property");
	assert_not_equals(iframe.contentWindow.document.defaultView, null,
		"Sanity check: document.defaultView must not be null");
	assert_not_equals(iframe.contentWindow.getSelection(), null,
		"window.getSelection() must not be null");
	assert_true(iframe.contentWindow.getSelection() instanceof iframe.contentWindow.Selection);
});

testDescs.push("document.getSelection() instanceof Selection in an iframe");
testFuncs.push(function() {
	assert_true("Selection" in iframe.contentWindow,
		"Sanity check: window must have Selection property");
	assert_not_equals(iframe.contentDocument.defaultView, null,
		"Sanity check: document.defaultView must not be null");
	assert_not_equals(iframe.contentDocument.getSelection(), null,
		"document.getSelection() must not be null");
	assert_equals(typeof iframe.contentDocument.getSelection(), "object",
		"document.getSelection() must be an object");
	assert_true(iframe.contentDocument.getSelection() instanceof iframe.contentWindow.Selection);
});

testDescs.push("window.getSelection() === document.getSelection() in an iframe");
testFuncs.push(function() {
	assert_not_equals(iframe.contentDocument.defaultView, null,
		"Sanity check: document.defaultView must not be null");
	assert_equals(iframe.contentWindow.getSelection(), iframe.contentDocument.getSelection());
});

testDescs.push("getSelection() inside and outside iframe must return different objects");
testFuncs.push(function() {
	assert_not_equals(iframe.contentWindow.getSelection(), getSelection());
});

testDescs.push("getSelection() on HTML document with null defaultView must be null inside an iframe");
testFuncs.push(function() {
	var doc = iframe.contentDocument.implementation.createHTMLDocument("");
	assert_equals(doc.defaultView, null,
		"Sanity check: defaultView of created HTML document must be null");
	assert_equals(doc.getSelection(), null);
});

var asyncTests = [];
testDescs.forEach(function(desc) {
	asyncTests.push(async_test(desc + " onload"));
});

iframe.onload = function() {
	asyncTests.forEach(function(t, i) {
		t.step(testFuncs[i]);
		t.done();
	});
};

document.body.appendChild(iframe);

testDescs.forEach(function(desc, i) {
	test(testFuncs[i], desc + " immediately after appendChild");
});
</script>