<!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">Mozilla Bug 1334537</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> </pre> </body> </html>