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Diffstat (limited to 'dom/bindings/test/test_stringBindings.html')
| -rw-r--r-- | dom/bindings/test/test_stringBindings.html | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/dom/bindings/test/test_stringBindings.html b/dom/bindings/test/test_stringBindings.html new file mode 100644 index 0000000000..ad8b60df07 --- /dev/null +++ b/dom/bindings/test/test_stringBindings.html @@ -0,0 +1,109 @@ +<!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> |