4gewinnt: finished checkButtons method

src/main/java/de/tims/viergewinnt/ai/Logic.java

@@ -87,7 +87,11 @@ public class Logic {
 	}
 	
 	public boolean checkButtons() {
-		return true;
+		boolean res = false;
+		for(int i = 0; i < buttons.length; i++) {
+			res = buttons[i].isEnabled() | res;
+		}
+		return res;
 	}
 	
 	JPanel contentPanel;

src/test/java/de/tims/viergewinnt/ai/LogicTest.java

@@ -227,7 +227,7 @@ class LogicTest {
 	}
 	
 	@Test
-	void checkButtonsTest() {
+	void checkButtonsTestTrue() {
 		testObj.create4gewinntGui();
 		boolean expectedResult = true;
 		
@@ -236,6 +236,19 @@ class LogicTest {
 		assertEquals(expectedResult, realResult);
 	}
 	
+	@Test
+	void checkButtonsTestFalse() {
+		testObj.create4gewinntGui();
+		boolean expectedResult = false;
+		for(int i = 0; i < testObj.buttons.length; i++) {
+			testObj.buttons[i].setEnabled(false);
+		}
+		
+		boolean realResult = testObj.checkButtons();
+		
+		assertEquals(expectedResult, realResult);
+	}
+	
 	private static Stream<Arguments> playfieldResults() {
 		int[][] playfield1 = {{0, 0, 0, 0, 0, 0}, 
 				   			  {0, 0, 0, 0, 0, 0},