Quelle test_blob_simple.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/indexedDB/test/test_blob_simple.html

<html>
<head>
  <title>Indexed Database Property Test</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

  <script type="text/javascript">
  function* testSteps()
  {
    info("Setting up test fixtures: create an IndexedDB database and object store.");

    let request = indexedDB.open(window.location.pathname, 1);
    request.onerror = errorHandler;
    request.onupgradeneeded = grabEventAndContinueHandler;
    request.onsuccess = unexpectedSuccessHandler;
    let event = yield undefined;

    let db = event.target.result;
    db.onerror = errorHandler;

    let objectStore = db.createObjectStore("foo", { autoIncrement: true });
    let index = objectStore.createIndex("foo", "index");

    request.onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Let's create a blob and store it in IndexedDB twice.");

    const BLOB_DATA = ["fun ", "times ", "all ", "around!"];
    const INDEX_KEY = 5;
    let blob = new Blob(BLOB_DATA, { type: "text/plain" });
    let data = { blob, index: INDEX_KEY };

    objectStore = db.transaction("foo", "readwrite").objectStore("foo");
    objectStore.add(data).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Added blob to database once");

    let key = event.target.result;

    objectStore.add(data).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Added blob to database twice");

    info("Let's retrieve the blob again and verify the contents is the same.");

    objectStore = db.transaction("foo").objectStore("foo");
    objectStore.get(key).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Got blob from database");

    let fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(event.target.result.blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    info("Let's retrieve it again, create an object URL for the blob, load" +
         "it via an XMLHttpRequest, and verify the contents is the same.");

    objectStore = db.transaction("foo").objectStore("foo");
    objectStore.get(key).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Got blob from database");

    let blobURL = URL.createObjectURL(event.target.result.blob);

    let xhr = new XMLHttpRequest();
    xhr.open("GET", blobURL);
    xhr.onload = grabEventAndContinueHandler;
    xhr.send();
    yield undefined;

    URL.revokeObjectURL(blobURL);

    is(xhr.responseText, BLOB_DATA.join(""), "Correct responseText");

    info("Retrieve both blob entries from the database and verify contents.");

    objectStore = db.transaction("foo").objectStore("foo");
    objectStore.mozGetAll().onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    is(event.target.result.length, 2, "Got right number of items");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(event.target.result[0].blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    let cursorResults = [];

    objectStore = db.transaction("foo").objectStore("foo");
    objectStore.openCursor().onsuccess = function(event) {
      let cursor = event.target.result;
      if (cursor) {
        info("Got item from cursor");
        cursorResults.push(cursor.value);
        cursor.continue();
      }
      else {
        info("Finished cursor");
        continueToNextStep();
      }
    };
    yield undefined;

    is(cursorResults.length, 2, "Got right number of items");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(cursorResults[0].blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    info("Retrieve blobs from database via index and verify contents.");

    index = db.transaction("foo").objectStore("foo").index("foo");
    index.get(INDEX_KEY).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    info("Got blob from database");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(event.target.result.blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    index = db.transaction("foo").objectStore("foo").index("foo");
    index.mozGetAll().onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    is(event.target.result.length, 2, "Got right number of items");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(event.target.result[0].blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    cursorResults = [];

    index = db.transaction("foo").objectStore("foo").index("foo");
    index.openCursor().onsuccess = function(event) {
      let cursor = event.target.result;
      if (cursor) {
        info("Got item from cursor");
        cursorResults.push(cursor.value);
        cursor.continue();
      }
      else {
        info("Finished cursor");
        continueToNextStep();
      }
    };
    yield undefined;

    is(cursorResults.length, 2, "Got right number of items");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(cursorResults[0].blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(cursorResults[1].blob);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    info("Slice the the retrieved blob and verify its contents.");

    let slice = cursorResults[1].blob.slice(0, BLOB_DATA[0].length);

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(slice);
    event = yield undefined;

    is(event.target.result, BLOB_DATA[0], "Correct text");

    info("Send blob to a worker, read its contents there, and verify results.");

    function workerScript() {
      /* eslint-env worker */
      onmessage = function(event) {
        var reader = new FileReaderSync();
        postMessage(reader.readAsText(event.data));

        var slice = event.data.slice(1, 2);
        postMessage(reader.readAsText(slice));
      };
    }

    let url =
      URL.createObjectURL(new Blob(["(", workerScript.toString(), ")()"]));

    let worker = new Worker(url);
    worker.postMessage(slice);
    worker.onmessage = grabEventAndContinueHandler;
    event = yield undefined;

    is(event.data, BLOB_DATA[0], "Correct text");
    event = yield undefined;

    is(event.data, BLOB_DATA[0][1], "Correct text");

    info("Store a blob back in the database, and keep holding on to the " +
         "blob, verifying that it still can be read.");

    objectStore = db.transaction("foo").objectStore("foo");
    objectStore.get(key).onsuccess = grabEventAndContinueHandler;
    event = yield undefined;

    let blobFromDB = event.target.result.blob;
    info("Got blob from database");

    let txn = db.transaction("foo", "readwrite");
    txn.objectStore("foo").put(event.target.result, key);
    txn.oncomplete = grabEventAndContinueHandler;
    event = yield undefined;

    info("Stored blob back into database");

    fileReader = new FileReader();
    fileReader.onload = grabEventAndContinueHandler;
    fileReader.readAsText(blobFromDB);
    event = yield undefined;

    is(event.target.result, BLOB_DATA.join(""), "Correct text");

    blobURL = URL.createObjectURL(blobFromDB);

    xhr = new XMLHttpRequest();
    xhr.open("GET", blobURL);
    xhr.onload = grabEventAndContinueHandler;
    xhr.send();
    yield undefined;

    URL.revokeObjectURL(blobURL);

    is(xhr.responseText, BLOB_DATA.join(""), "Correct responseText");

    finishTest();
  }
  </script>
  <script type="text/javascript" src="helpers.js"></script>

</head>

<body onload="runTest();"></body>

</html>

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