在 TestFX 上测试通过，但不在无头模式下

Question

我正在使用 TestFX 测试使用 Ctrl 键在 ListView 中选择多个项目，然后单击一个按钮，该按钮会生成一个警报对话框，其内容基于所选项目。

press(KeyCode.CONTROL);
clickOn((Node) lookup(hasText("Item 0")).query());
verifyThat((Node) lookup(hasText("Item 0")).query(), Node::isFocused);
clickOn((Node) lookup(hasText("Item 1")).query());
verifyThat((Node) lookup(hasText("Item 1")).query(), Node::isFocused);
clickOn((Node) lookup(hasText("Item 2")).query());
verifyThat((Node) lookup(hasText("Item 2")).query(), Node::isFocused);
release(KeyCode.CONTROL);

clickOn("actionButton");
alertDialogHasHeaderAndContent("Items selected: 3"); // my own function

处于专注模式

测试全部通过。

无头模式

三个verifyThat 测试全部通过，但是当它单击按钮并验证生成的警报对话框是否正确时，它不是；生成的警报就像只选择了列表中的一项。

结果：

org.junit.ComparisonFailure: 
Expected :Items selected: 3
Actual   :Items selected: 1

---

为了完整起见，这里是alertDialogHasHeaderAndContent：

/**
 * Checks the current alert dialog displayed (on the top of the window stack) has the expected contents.
 *
 * From https://stackoverflow.com/a/48654878/8355496
 * Licenced under cc by-sa 3.0 with attribution required https://creativecommons.org/licenses/by-sa/3.0/
 * @param expectedHeader Expected header of the dialog
 * @param expectedContent Expected content of the dialog
 */
private void alertDialogHasHeaderAndContent(final String expectedHeader, final String expectedContent) {
    final Stage actualAlertDialog = getTopModalStage();
    assertNotNull(actualAlertDialog);

    final DialogPane dialogPane = (DialogPane) actualAlertDialog.getScene().getRoot();
    assertEquals(expectedHeader, dialogPane.getHeaderText());
    assertEquals(expectedContent, dialogPane.getContentText());
}

/**
 * Get the top modal window.
 *
 * Adapted from https://stackoverflow.com/a/48654878/8355496
 * Licenced under cc by-sa 3.0 with attribution required https://creativecommons.org/licenses/by-sa/3.0/
 * @return the top modal window
 */
private Stage getTopModalStage() {
    // Get a list of windows but ordered from top[0] to bottom[n] ones.
    // It is needed to get the first found modal window.
    final List<Window> allWindows = new ArrayList<>(new FxRobot().robotContext().getWindowFinder().listWindows());
    Collections.reverse(allWindows);

    return (Stage) allWindows
            .stream()
            .filter(window -> window instanceof Stage)
            .findFirst()
            .orElse(null);
}

Answer 1

这是 Monocole 的问题。请参阅https://github.com/TestFX/TestFX/issues/566 了解更多信息。