JFileChooserFixture.selectFile() fails if called twice in OSX

Hi,

The following second Test fails on OSX. On Windows it works like expected. It might be a Swing issue in the MAC VM.

```
import java.io.File;

import org.assertj.swing.core.Robot;
import org.assertj.swing.edt.GuiActionRunner;
import org.assertj.swing.edt.GuiQuery;
import org.assertj.swing.finder.JFileChooserFinder;
import org.assertj.swing.fixture.FrameFixture;
import org.assertj.swing.fixture.JFileChooserFixture;
import org.assertj.swing.junit.testcase.AssertJSwingJUnitTestCase;
import org.junit.Test;

public class FileChooserTest extends AssertJSwingJUnitTestCase {

protected FrameFixture window;
protected Robot robot;

@Override
protected void onSetUp() {

FileChooserFrame mainFrame = GuiActionRunner
.execute(new GuiQuery() {

protected FileChooserFrame executeInEDT() {

return new FileChooserFrame();
}
});
robot = robot();
window = new FrameFixture(robot, mainFrame);
}

@Test
public void openFileChooser() {
selectFile();

}

@Test
public void openFileChooserAgain() {
selectFile();
}

private void selectFile() {
String seperator = System.getProperty("file.separator");
String currentDir = new File("").getAbsolutePath() + seperator + "src";
String filePath = currentDir + seperator + "FileChooserFrame.java";

window.button().click();
JFileChooserFixture fileChooser = JFileChooserFinder.findFileChooser()
.using(robot);

fileChooser.setCurrentDirectory(new File(currentDir));
fileChooser.selectFile(new File(filePath));
fileChooser.approve();

window.textBox().requireText(filePath);
}

}
```

```
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.io.File;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class FileChooserFrame extends JFrame {

public FileChooserFrame() {

setSize(200, 100);
setTitle(getClass().getCanonicalName());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLayout(new FlowLayout());

JTextField textField = new JTextField();
textField.setPreferredSize(new Dimension(200, 20));
JButton button = new JButton("FileChooser");
JFrame parentFrame = this;
button.addActionListener(new AbstractAction() {

@Override
public void actionPerformed(ActionEvent e) {
JFileChooser fileChooser = new JFileChooser();
int returnVal = fileChooser.showOpenDialog(parentFrame);

if (returnVal == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
textField.setText(file.getAbsolutePath());
}
}

});

add(textField);
add(button);
setVisible(true);
}

public static void main(String[] args) {
new FileChooserFrame();
}
}
```

```

4.0.0
AssertJSwingTest
AssertJSwingTest
0.0.1-SNAPSHOT

src


maven-compiler-plugin
3.3

1.8
1.8






org.assertj
assertj-swing-junit
3.1.1

```