mozilla-central/testing/web-platform/tests/selection/getSelection.html

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Test Info: Warnings

<!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>