✅ Real UI test

tests/ui/UI_Tests.swift

@@ -21,6 +21,21 @@ final class UI_Tests: XCTestCase {
         let app = XCUIApplication()
         app.launchArguments = ["--configuration:working"]
         app.launch()
+        // XCTAssert(app.dialogs["Notice"].waitForExistence(timeout: 5))
         sleep(10)
     }
+
+    func testApplicationCanLaunchWithTestConfigurationAndThrowsAlert() throws {
+        // UI tests must launch the application that they test.
+        let app = XCUIApplication()
+        app.launchArguments = ["--configuration:broken"]
+        app.launch()
+        XCTAssert(app.dialogs["Notice"].waitForExistence(timeout: 5))
+        app.buttons["OK"].click()
+        XCTAssert(app.dialogs["Notice"].waitForExistence(timeout: 5))
+        XCTAssert(app.buttons["Quit"].waitForExistence(timeout: 1))
+        // If this UI test presses the "Quit" button, the test takes forever
+        // because Xcode will attempt to figure out if the app closed correctly.
+        app.terminate()
+    }
 }