EmojiTest.java

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import javafx.scene.Node;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import com.oracle.util.testing.ManualTestWindow;

public class EmojiTest extends ManualTestWindow {
    public static void main(String[] args) {
        launch(args);
    }

    public EmojiTest() {
        super(
            "Emoji Rendering Test (macOS)",
            """
            This tests rendering of Emoji glyphs which is only supported on macOS.
            On macOS you should see a yellow-coloured smiling face image,
            embedded between 'ab' and 'cd'.
            On other platforms it may be a missing glyph, or an empty space, or
            a similar rendering as a greyscale/B&W glyph.
            Principally, you are checking that the emoji is rendered on macOS in
            each of the controls and nodes displayed in the test, and that the
            editable text field handles selection of the emoji glyph with the
            same background as other glyphs - this presumes the emoji image has
            transparent background pixels.
            There are 3 different ways it is displayed to verify
            1) Text node. 2) Label control, 3) TextField Control
            Press the Pass or Fail button as appropriate and the test will exit.
            If what you see is not explained here, ask before filing a bug.
            """,
            1200, 800
        );
    }

    @Override
    protected Node createContent() {
        Font font = new Font(32);
        String emojiString = "ab\ud83d\ude00cd";
        Text text = new Text(emojiString);
        text.setFont(font);
        Label label = new Label(emojiString);
        label.setFont(font);
        TextField textField = new TextField(emojiString);
        textField.setFont(font);

        return new VBox(
            2,
            text,
            label,
            textField
        );
    }
}