third_party/WebKit/LayoutTests/fast/files/file-reader-result-twice.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body>
   4 <p>Test that FileReader.result returns the same result regardless of whether it's from cache or not by getting it twice.</p>
   5 <script src="../../resources/testharness.js"></script>
   6 <script src="../../resources/testharnessreport.js"></script>
   7 <script type="text/javascript">
   8 function setupHandlers(test, reader, expectedResult)
   9 {
  10     reader.onabort = test.step_func(function() {
  11         assert_unreached("onabort invoked on reader");
  12     });
  13     reader.onerror = test.step_func(function() {
  14         assert_unreached("onerror invoked on reader");
  15     });
  16     reader.onloadend = test.step_func(function() {
  17         assert_equals(reader.readyState, reader.DONE,
  18                       "reader.readyState");
  19         assert_equals(reader.error, null, "reader.error");
  20         // Read result attribute twice to go through Blink's code path for
  21         // caching converted result and reading from the cache.
  22         assert_equals(reader.result, expectedResult, "reader.result");
  23         assert_equals(reader.result, expectedResult, "reader.result");
  24         test.done();
  25     });
  26 }
  27
  28 var blob = new Blob(["HelloWorld"], {"type": "text/plain;charset=us-ascii"});
  29
  30 var testBinaryString = async_test("Read from a blob as a binary string");
  31 testBinaryString.step(function() {
  32     var reader = new FileReader();
  33     reader.readAsBinaryString(blob);
  34     setupHandlers(testBinaryString, reader, "HelloWorld");
  35 });
  36
  37 var testText = async_test("Read from a blob as a text");
  38 testText.step(function() {
  39     var reader = new FileReader();
  40     reader.readAsText(blob);
  41     setupHandlers(testText, reader, "HelloWorld");
  42 });
  43
  44 var testDataURL = async_test("Read from a blob as a data URL");
  45 testDataURL.step(function() {
  46     var reader = new FileReader();
  47     reader.readAsDataURL(blob);
  48     setupHandlers(testDataURL, reader, "data:text/plain;charset=us-ascii;base64,SGVsbG9Xb3JsZA==");
  49 });
  50 </script>
  51 </body>
  52 </html>