filereader_result.any.js

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This WPT test may be referenced by the following Test IDs:
- /FileAPI/reading-data-section/filereader_result.any.html - WPT Dashboard Interop Dashboard
- /FileAPI/reading-data-section/filereader_result.any.worker.html - WPT Dashboard Interop Dashboard

// META: title=FileAPI Test: filereader_result

    var blob, blob2;

    setup(function() {

      blob = new Blob(["This test the result attribute"]);

      blob2 = new Blob(["This is a second blob"]);

});

    async_test(function() {

      var readText = new FileReader();

      assert_equals(readText.result, null);

      readText.onloadend = this.step_func(function(evt) {

        assert_equals(typeof readText.result, "string", "The result type is string");

        assert_equals(readText.result, "This test the result attribute", "The result is correct");

        this.done();

});

      readText.readAsText(blob);

    }, "readAsText");

    async_test(function() {

      var readDataURL = new FileReader();

      assert_equals(readDataURL.result, null);

      readDataURL.onloadend = this.step_func(function(evt) {

        assert_equals(typeof readDataURL.result, "string", "The result type is string");

        assert_true(readDataURL.result.indexOf("VGhpcyB0ZXN0IHRoZSByZXN1bHQgYXR0cmlidXRl") != -1, "return the right base64 string");

        this.done();

});

      readDataURL.readAsDataURL(blob);

    }, "readAsDataURL");

    async_test(function() {

      var readArrayBuffer = new FileReader();

      assert_equals(readArrayBuffer.result, null);

      readArrayBuffer.onloadend = this.step_func(function(evt) {

        assert_true(readArrayBuffer.result instanceof ArrayBuffer, "The result is instanceof ArrayBuffer");

        this.done();

});

      readArrayBuffer.readAsArrayBuffer(blob);

    }, "readAsArrayBuffer");

    async_test(function() {

      var readBinaryString = new FileReader();

      assert_equals(readBinaryString.result, null);

      readBinaryString.onloadend = this.step_func(function(evt) {

        assert_equals(typeof readBinaryString.result, "string", "The result type is string");

        assert_equals(readBinaryString.result, "This test the result attribute", "The result is correct");

        this.done();

});

      readBinaryString.readAsBinaryString(blob);

    }, "readAsBinaryString");

    for (let event of ['loadstart', 'progress']) {

      for (let method of ['readAsText', 'readAsDataURL', 'readAsArrayBuffer', 'readAsBinaryString']) {

        promise_test(async function(t) {

          var reader = new FileReader();

          assert_equals(reader.result, null, 'result is null before read');

          var eventWatcher = new EventWatcher(t, reader,

              [event, 'loadend']);

          reader[method](blob);

          assert_equals(reader.result, null, 'result is null after first read call');

          await eventWatcher.wait_for(event);

          assert_equals(reader.result, null, 'result is null during event');

          await eventWatcher.wait_for('loadend');

          assert_not_equals(reader.result, null);

          reader[method](blob);

          assert_equals(reader.result, null, 'result is null after second read call');

          await eventWatcher.wait_for(event);

          assert_equals(reader.result, null, 'result is null during second read event');

        }, 'result is null during "' + event + '" event for ' + method);