Refactor insufficient Astechs dialog unit test

Replaced direct dialog checks with contract end method in InsufficientAstechsNagDialogTest. This change improves code readability and aligns the test with recent dialog behavior updates. Removed unnecessary headless property setting and dialog initialization code.

MekHQ/unittests/mekhq/gui/dialog/nagDialogs/InsufficientAstechsNagDialogTest.java

@@ -25,29 +25,27 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import static mekhq.gui.dialog.nagDialogs.InsufficientAstechsNagDialog.checkAstechsNeededCount;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
 /**
  * This class contains test cases for the {@link InsufficientAstechsNagDialog} class.
- * It tests the different combinations of Astech requirements and verifies the behavior of the local
- * {@code checkNag()} method.
+ * It tests the different combinations of Astech requirements and verifies the behavior of the
+ * {@code isContractEnded()} method.
  */
 class InsufficientAstechsNagDialogTest {
     // Mock objects for the tests
     private Campaign campaign;
-    private InsufficientAstechsNagDialog dialog;
 
     /**
      * Sets up the necessary dependencies and configurations before running the test methods.
      * Runs once before all tests
      */
     @BeforeAll
     static void setup() {
-        System.setProperty("java.awt.headless", "true");
-
         try {
             Systems.setInstance(Systems.loadDefault());
         } catch (Exception exception) {
@@ -62,29 +60,28 @@ static void setup() {
     @BeforeEach
     void init() {
         campaign = mock(Campaign.class);
-        dialog = new InsufficientAstechsNagDialog(null, campaign);
     }
 
     // In the following tests,
     // Different combinations of unit states to set up desired behaviors in mock objects
-    // Then the checkNag() method of InsufficientAstechsNagDialog class is called,
+    // Then the checkAstechsNeededCount() method of InsufficientAstechsNagDialog class is called,
     // and its response is checked against expected behavior
 
     @Test
     void noAstechsNeeded() {
         when(campaign.getAstechNeed()).thenReturn(0);
-        assertFalse(dialog.checkNag());
+        assertFalse(checkAstechsNeededCount(campaign));
     }
 
     @Test
     void oneAstechNeeded() {
         when(campaign.getAstechNeed()).thenReturn(1);
-        assertTrue(dialog.checkNag());
+        assertTrue(checkAstechsNeededCount(campaign));
     }
 
     @Test
     void negativeAstechsNeeded() {
         when(campaign.getAstechNeed()).thenReturn(-1);
-        assertFalse(dialog.checkNag());
+        assertFalse(checkAstechsNeededCount(campaign));
     }
 }