4gewinnt: added playChip method

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

@@ -13,6 +13,10 @@ import javax.swing.JPanel;
 
 public class Logic {
 	
+	public int playChip(int[][] playfield, int column, int player) {
+		return 0;
+	}
+	
 	JPanel contentPanel;
 	JPanel buttonPanel;
 	JPanel playfieldPanel;

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

@@ -28,6 +28,17 @@ class LogicTest {
 		assertEquals(expectedResult, realResult);
 	}
 	
+	@Test
+	void playChipTest() {
+		int[][] playfield = new int[6][6];
+		int column = 0;
+		int player = 1;
+		int expectedResult = 0;
+		int realResult = testObj.playChip(playfield, column, player);
+		
+		assertEquals(expectedResult, realResult);
+	}
+	
 	private static Stream<Arguments> playfieldResults() {
 		int[][] playfield1 = {{0, 0, 0, 0, 0, 0}, 
 				   			  {0, 0, 0, 0, 0, 0},