Programmatically Upload / Add File Via Dropzone E.g. By Selenium

I am writing a Selenium test case where one of the steps is to upload a file via Dropzone.js. (As Selenium can run Javascript in the browser, so if it can be done programmatically

Solution 1:

Click to Input button -> Use web driver clipboard/java robot -> Paste/type file location + file name > Hit robot enter.

final String fileName = "textfile.txt";
final String filePath = "\\data\\public\\other\\" + fileName;
zUploadFile (filePath );

public void zUploadFile (String filePath) throws HarnessException {

    // Put path to your image in a clipboard
    StringSelection ss = new StringSelection(filePath);
    Toolkit.getDefaultToolkit().getSystemClipboard().setContents(ss, null);
    // OR use java robot for entire filepath
    Thread.sleep(10000);

    // Imitate mouse events like ENTER, CTRL+C, CTRL+V
    Robot robot;
    try {
        robot = new Robot();
        robot.keyPress(KeyEvent.VK_CONTROL);
        robot.keyPress(KeyEvent.VK_V);
        robot.keyRelease(KeyEvent.VK_V);
        robot.keyRelease(KeyEvent.VK_CONTROL);

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        robot.keyPress(KeyEvent.VK_ENTER);
        robot.keyRelease(KeyEvent.VK_ENTER);

    } catch (AWTException e) {
        e.printStackTrace();
    }
}