dom/bindings/test/test_stringBindings.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=1334537
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 1334537</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11   <script type="application/javascript">
  12
  13   /** Test for Bug 1334537 **/
  14   SimpleTest.waitForExplicitFinish();
  15
  16   function go() {
  17     // Need a new global that will pick up our pref.
  18     var ifr = document.createElement("iframe");
  19     document.body.appendChild(ifr);
  20
  21     var t = new ifr.contentWindow.TestFunctions();
  22     var testString = "abcdefghijklmnopqrstuvwxyz";
  23     const substringLength = 10;
  24     var shortTestString = testString.substring(0, substringLength);
  25
  26     t.setStringData(testString);
  27     // Note: we want to do all our gets before we start running code we don't
  28     // control inside the test harness, if we really want to exercise the string
  29     // cache in controlled ways.
  30
  31     var asShortDOMString = t.getStringDataAsDOMString(substringLength);
  32     var asFullDOMString = t.getStringDataAsDOMString();
  33     var asShortAString = t.getStringDataAsAString(substringLength);
  34     var asAString = t.getStringDataAsAString();
  35
  36     is(asShortDOMString, shortTestString, "Short DOMString should be short");
  37     is(asFullDOMString, testString, "Full DOMString should be test string");
  38     is(asShortAString, shortTestString, "Short AString should be short");
  39     is(asAString, testString, "Full AString should be test string");
  40
  41     // These strings should match the strings used in TestFunctions.cpp, but we
  42     // want to launder them through something on the JS side that will convert
  43     // them into strings stored in the JS heap.
  44     function launder(str) {
  45       // This should be sufficient, but if the JIT gets too smart we may need
  46       // to get more clever.
  47       return str.split("").join("");
  48     }
  49     var shortString = launder(t.getShortLiteralString());
  50     var mediumString = launder(t.getMediumLiteralString());
  51     var longString = launder(t.getLongLiteralString());
  52
  53     // A short or medium non-external string will become an inline FakeString.
  54     is(t.getStringType(shortString), "inline",
  55        "Short string should become inline");
  56     is(t.getStringType(mediumString), "inline",
  57        "Medium string should become inline");
  58     // A long string will become a stringbuffer FakeString on the way in.
  59     is(t.getStringType(longString), "stringbuffer",
  60        "Long string should become a stringbuffer");
  61
  62     // A short literal string will become an inline JS string on the way out
  63     // and then become an inline FakeString on the way in.
  64     is(t.getStringType(t.getShortLiteralString()), "inline",
  65        "Short literal string should become inline");
  66     // A medium or long literal string will become an external JS string on the
  67     // way out and then become a literal FakeString on the way in.
  68     is(t.getStringType(t.getMediumLiteralString()), "literal",
  69        "Medium literal string should become literal");
  70     is(t.getStringType(t.getLongLiteralString()), "literal",
  71        "Long literal string should become literal");
  72
  73     // A short stringbuffer string will become an inline JS string on the way
  74     // out and then become an inline FakeString on the way in.
  75     is(t.getStringType(t.getStringbufferString(shortString)), "inline",
  76        "Short stringbuffer string should become inline");
  77     // A medium or long stringbuffer string will become an external JS string
  78     // on the way out and then become a stringbuffer FakeString on the way in.
  79     is(t.getStringType(t.getStringbufferString(mediumString)), "stringbuffer",
  80        "Medium stringbuffer string should become stringbuffer");
  81     is(t.getStringType(t.getStringbufferString(longString)), "stringbuffer",
  82        "Long stringbuffer string should become stringbuffer");
  83
  84     // Now test that roundtripping works fine.  We need to make sure the string
  85     // we are storing is not equal to any of the ones we have used above, to
  86     // avoid the external string cache interfering.
  87     t.setStringData(longString + "unique");  // Should store with stringbuffer.
  88     ok(t.stringbufferMatchesStored(t.getStringDataAsAString()),
  89        "Stringbuffer should have roundtripped");
  90
  91     SimpleTest.finish();
  92   }
  93
  94   addLoadEvent(function() {
  95     SpecialPowers.pushPrefEnv({set: [["dom.expose_test_interfaces", true]]},
  96                               go);
  97   });
  98   </script>
  99 </head>
 100 <body>
 101 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1334537">Mozilla Bug 1334537</a>
 102 <p id="display"></p>
 103 <div id="content" style="display: none">
 104
 105 </div>
 106 <pre id="test">
 107 </pre>
 108 </body>
 109 </html>