<!
DOCTYPE HTML>
<
html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1334537
-->
<
head>
<
meta charset=
"utf-8">
<
title>Test for Bug 1334537</
title>
<
script src=
"/tests/SimpleTest/SimpleTest.js"></
script>
<
link rel=
"stylesheet" type=
"text/css" href=
"/tests/SimpleTest/test.css"/>
<
script type=
"application/javascript">
/** Test for Bug 1334537 **/
SimpleTest.waitForExplicitFinish();
function go() {
// Need a new global that will pick up our pref.
var ifr = document.createElement(
"iframe");
document.
body.appendChild(ifr);
var t = new ifr.contentWindow.TestFunctions();
var testString =
"abcdefghijklmnopqrstuvwxyz";
const substringLength = 10;
var shortTestString = testString.substring(0, substringLength);
t.setStringData(testString);
// Note: we want to do all our gets before we start running
code we don
't
// control inside the test harness, if we really want to exercise the string
// cache in controlled ways.
var asShortDOMString = t.getStringDataAsDOMString(substringLength);
var asFullDOMString = t.getStringDataAsDOMString();
var asShortAString = t.getStringDataAsAString(substringLength);
var asAString = t.getStringDataAsAString();
is(asShortDOMString, shortTestString,
"Short DOMString should be short");
is(asFullDOMString, testString,
"Full DOMString should be test string");
is(asShortAString, shortTestString,
"Short AString should be short");
is(asAString, testString,
"Full AString should be test string");
// These strings should match the strings used in TestFunctions.cpp, but we
// want to launder them through something on the JS side that will convert
// them into strings stored in the JS heap.
function launder(str) {
// This should be sufficient, but if the JIT gets too smart we may need
// to get more clever.
return str.split(
"").join(
"");
}
var shortString = launder(t.getShortLiteralString());
var mediumString = launder(t.getMediumLiteralString());
var longString = launder(t.getLongLiteralString());
// A short or medium non-external string will become an inline FakeString.
is(t.getStringType(shortString),
"inline",
"Short string should become inline");
is(t.getStringType(mediumString),
"inline",
"Medium string should become inline");
// A long string will become a stringbuffer FakeString on the way in.
is(t.getStringType(longString),
"stringbuffer",
"Long string should become a stringbuffer");
// A short literal string will become an inline JS string on the way out
// and then become an inline FakeString on the way in.
is(t.getStringType(t.getShortLiteralString()),
"inline",
"Short literal string should become inline");
// A medium or long literal string will become an external JS string on the
// way out and then become a literal FakeString on the way in.
is(t.getStringType(t.getMediumLiteralString()),
"literal",
"Medium literal string should become literal");
is(t.getStringType(t.getLongLiteralString()),
"literal",
"Long literal string should become literal");
// A short stringbuffer string will become an inline JS string on the way
// out and then become an inline FakeString on the way in.
is(t.getStringType(t.getStringbufferString(shortString)),
"inline",
"Short stringbuffer string should become inline");
// A medium or long stringbuffer string will become an external JS string
// on the way out and then become a stringbuffer FakeString on the way in.
is(t.getStringType(t.getStringbufferString(mediumString)),
"stringbuffer",
"Medium stringbuffer string should become stringbuffer");
is(t.getStringType(t.getStringbufferString(longString)),
"stringbuffer",
"Long stringbuffer string should become stringbuffer");
// Now test that roundtripping works fine. We need to make sure the string
// we are storing is not equal to any of the ones we have used above, to
// avoid the external string cache interfering.
t.setStringData(longString +
"unique"); // Should store with stringbuffer.
ok(t.stringbufferMatchesStored(t.getStringDataAsAString()),
"Stringbuffer should have roundtripped");
SimpleTest.finish();
}
addLoadEvent(function() {
SpecialPowers.pushPrefEnv({set: [[
"dom.expose_test_interfaces", true]]},
go);
});
</
script>
</
head>
<
body>
<a target=
"_blank" href=
"https://bugzilla.mozilla.org/show_bug.cgi?id=1334537">Mozil
la Bug 1334537</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
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