4gewinnt: added test for board with size 0

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

@@ -31,7 +31,7 @@ public class Logic {
 	}
 	
 	public int getBoardSize() {
-		return 6;
+		return 0;
 	}
 	
 	public void setCurrentPlayer(int player) {

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

@@ -169,9 +169,10 @@ class LogicTest {
 		assertEquals(expectedResult.getClass(), realResult.getClass());
 	}
 	
-	@Test
-	void getBoardSize() {
-		int expectedResult = 6;
+	@ParameterizedTest(name = "[{index}] size {0}")
+	@MethodSource("boardSizeParameters")
+	void getBoardSize(String testName, int size) {
+		int expectedResult = size;
 		int realResult = testObj.getBoardSize();
 		
 		assertEquals(expectedResult, realResult);
@@ -265,5 +266,11 @@ class LogicTest {
 				Arguments.of("fullyFilled", playfield6, 2580)
 				);
 	}
+	
+	private static Stream<Arguments> boardSizeParameters() {
+		return Stream.of(
+				Arguments.of("board with size 0", 0)
+				);
+	}
 
 }