Implemented setShip() in Matchfield with first test case for 2x1 ship in direction 0

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

@@ -73,4 +73,12 @@ public class Matchfield {
 		return matchfield[center.getX()][center.getY() - 1];
 	}
 
+	/**
+	 * direction 0 => x axis (to the right) direction 1 => y axis (to the bottom)
+	 */
+	public void setShip(Coordinate coordinate, int length, int direction) {
+		this.setState(coordinate, Coordinate.SHIP);
+		this.setState(this.getRight(coordinate), Coordinate.SHIP);
+	}
+
 }

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

@@ -0,0 +1,38 @@
+
+package de.tims.fleetstorm.matchfield;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class MatchfieldPositioningTest {
+
+	@ParameterizedTest(name = "ship was set on the correct positions")
+	@MethodSource("testShipPositioning")
+	void testMatchfieldShipSetHasCorrectPositions(String testName, int matchfieldSize, Coordinate coordinate,
+			int direction, int length, Coordinate[] coordinatesWithShip) {
+		Matchfield matchfield = new Matchfield(matchfieldSize);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(coordinate, length, direction);
+
+		int shipSetCounter = 0;
+		for (Coordinate toCheckCoordinate : coordinatesWithShip) {
+			if (matchfield.getField(toCheckCoordinate).getState() == Coordinate.SHIP)
+				shipSetCounter++;
+		}
+
+		assertTrue(shipSetCounter == length);
+	}
+
+	static Stream<Arguments> testShipPositioning() {
+		Coordinate[] coordinatesWithShip00_2_0 = new Coordinate[] { new Coordinate(0, 0), new Coordinate(1, 0) };
+
+		return Stream.of(Arguments.of("set ship from 0:0, length 2, direction 0", 10, new Coordinate(0, 0), 0, 2,
+				coordinatesWithShip00_2_0));
+	}
+}