<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test-pre.js"></script>
<script src="../../../resources/ui-helper.js"></script>
</head>
<body>
<input type="file" name="file1" id="file1">
<input type="file" name="file2" id="file2">
<script>
description("This tests the files attribute in file input forms");

if (window.testRunner) {
    jsTestIsAsync = true;

    var file1 = document.getElementById("file1");
    var file2 = document.getElementById("file2");

    file1.addEventListener("change", function() {
        file2.addEventListener("change", function() {
            runTest(file1, file2);
            finishJSTest();
        });
        window.setTimeout(function() {
            dragFilesOntoInput(file2, ["bar.txt"]);
        }, 0);
    });
    dragFilesOntoInput(file1, ["foo.txt"]);
}

function runTest(file1, file2) {
    shouldThrow('file1.files = "foo"');
    shouldBe("file1.files.length", "1");
    shouldBeEqualToString("file1.files.item(0).name", "foo.txt");

    file1.files = null;
    shouldBe("file1.files.length", "1");
    shouldBeEqualToString("file1.files.item(0).name", "foo.txt");

    // From current W3C spec, files attribute should be read only,
    // but WebKit implement it to be writable intentionally.
    // See: https://bugs.webkit.org/show_bug.cgi?id=87154#c15
    file1.files = file2.files;
    shouldBe("file1.files.length", "1");
    shouldBeEqualToString("file1.files.item(0).name", "bar.txt");
}

function dragFilesOntoInput(input, files) {
    testRunner.setOpenPanelFiles(files);
    var centerX = input.offsetLeft + input.offsetWidth / 2;
    var centerY = input.offsetTop + input.offsetHeight / 2;
    UIHelper.activateAt(centerX, centerY);
}
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>