Added Test case when one coordinate is hit, but others on free field (isFreePosition() method)

src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java

@@ -118,9 +118,9 @@ public class Matchfield {
 				return false;
 
 			if (direction == 0) {
-				next = new Coordinate(next.getX() + i, next.getY());
+				next = new Coordinate(next.getX() + 1, next.getY());
 			} else if (direction == 1) {
-				next = new Coordinate(next.getX(), next.getY() + i);
+				next = new Coordinate(next.getX(), next.getY() + 1);
 			}
 		}
 

src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java

@@ -148,6 +148,8 @@ class MatchfieldShipTest {
 				Arguments.of("one ship is within the coordinates", new Coordinate(0, 0), 1, 2,
 						new Coordinate[] { new Coordinate(0, 0) }, false),
 				Arguments.of("no ship is within the coordinates", new Coordinate(1, 1), 0, 5, new Coordinate[] {},
-						true));
+						true),
+				Arguments.of("one of the coordinates is hit, others on free fields", new Coordinate(5, 5), 1, 3,
+						new Coordinate[] { new Coordinate(5, 7), new Coordinate(5, 8), new Coordinate(5, 9) }, false));
 	}
 }