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import javax.accessibility.AccessibleValue;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;

/**
 * @test
 * @bug 8283387
 * @summary [macos] a11y : Screen magnifier does not show selected Tab
 *          JTabbedPane accessible children had no AccessibleValue manipulation API
 *          Testing this API since it was added in the fix for 8283387
 * @run main AccessibleTabbedPaneTest
 */

public class AccessibleTabbedPaneTest {
    public static void main(String[] args) {
        JTabbedPane pane = new JTabbedPane();
        JPanel p1, p2, p3;
        p1 = new JPanel();
        p2 = new JPanel();
        p3 = new JPanel();
        pane.add("One", p1);
        pane.add("Two", p2);
        pane.add("Three", p3);
        for (int i = 0; i < pane.getAccessibleContext().getAccessibleChildrenCount(); i++) {
            if (pane.getAccessibleContext()
                    .getAccessibleChild(i)
                    .getAccessibleContext()
                    .getAccessibleValue() == null) {
                throw new RuntimeException("Test failed, accessible value for tab "+ i + " is null");
            }
        }
        AccessibleValue p2a = pane.getAccessibleContext()
                                  .getAccessibleChild(1)
                                  .getAccessibleContext()
                                  .getAccessibleValue();
        // Select second tab using a11y API.
        if (p2a.setCurrentAccessibleValue(1)) {
            if (pane.getSelectedIndex() != 1) {
                throw new RuntimeException("Can not change tab selection using a11y API");
            }
        }

        // Try to deselect it - that should not be allowed
        if (p2a.setCurrentAccessibleValue(0)) {
            throw new RuntimeException("We should not be able to deselect "
                    + "currently selected tab via a11y API");
        }
    }
}