third_party/WebKit/LayoutTests/fast/files/blob-close-read.html

   1 <!doctype html>
   2 <script src="../../resources/js-test.js"></script>
   3 <script src="resources/read-common.js"></script>
   4 <script>
   5 description("Test the Blob.close() method, reading.");
   6
   7 window.jsTestIsAsync = true;
   8
   9 var blobContents = ['0123456789abcdef'];
  10
  11 var blob;
  12 var sliced;
  13 var reader;
  14 var reader2;
  15 var result;
  16
  17 function testReadAfterClose()
  18 {
  19     debug("Testing that the reading of closed Blobs fail.");
  20     blob = new Blob(blobContents);
  21     shouldBe("blob.close(); blob.size", "0");
  22     reader = new FileReader();
  23     shouldThrow("reader.readAsArrayBuffer(blob)");
  24     shouldThrow("reader.readAsBinaryString(blob)");
  25     shouldThrow("reader.readAsText(blob)");
  26     shouldThrow("reader.readAsDataURL(blob)");
  27     runNextTest();
  28 }
  29
  30 function testSlicedReadAfterClose()
  31 {
  32     debug("Testing that sliced reads aren't affected by close() on 'parent' Blob.");
  33     blob = new Blob(blobContents);
  34     sliced = blob.slice(2);
  35     shouldBe("sliced.size", "14");
  36     blob.close();
  37     var reader = new FileReader();
  38     reader.onload = function(event) {
  39         result = event.target.result;
  40         shouldBeEqualToString("result", blobContents[0].slice(2));
  41     }
  42     reader.onloadend = function() {
  43         testPassed("readAsText() completed");
  44         shouldBe("sliced.size", "14");
  45         runNextTest();
  46     }
  47     reader.onerror = function(event) {
  48         testFailed("Received error event: " + event.target.error.code);
  49     };
  50     reader.readAsText(sliced);
  51 }
  52
  53 function testContinuedReadAfterClose()
  54 {
  55     debug("Testing that ongoing async reads aren't interrupted by close()");
  56     blob = new Blob(blobContents);
  57     var reader = new FileReader();
  58     reader.onloadstart = function(event) {
  59         // Close the Blob being read.
  60         blob.close();
  61         reader2 = new FileReader();
  62         shouldThrow("reader2.readAsArrayBuffer(blob)");
  63         shouldBe("blob.size", "0");
  64     }
  65     reader.onload = function(event) {
  66         testPassed("FileReader loaded: " + event.target.result);
  67     }
  68     reader.onloadend = function() {
  69         testPassed("readAsText() completed");
  70         shouldBe("blob.size", "0");
  71         runNextTest();
  72     }
  73     reader.onerror = function(event) {
  74         testFailed("Received error event: " + event.target.error.code);
  75         runNextTest();
  76     };
  77     reader.readAsText(blob);
  78 }
  79
  80 var tests = [
  81     testReadAfterClose,
  82     testContinuedReadAfterClose,
  83     testSlicedReadAfterClose ];
  84
  85 function runNextTest()
  86 {
  87     if (!tests.length) {
  88         finishJSTest();
  89         return;
  90     }
  91     tests.shift()();
  92 }
  93
  94 runNextTest();
  95 </script>