From 3ff4b665f600a6230696daa5ee9d0ceecf9d5c78 Mon Sep 17 00:00:00 2001
From: Lorenz Hohmann <hohmann.lorenz99@gmail.com>
Date: Wed, 2 Feb 2022 16:53:42 +0100
Subject: [PATCH] Implemented method to random position ships on matchfield

---
 .../fleetstorm/matchfield/Matchfield.java     | 25 +++++++++++++++++++
 .../matchfield/MatchfieldShipTest.java        |  8 ++++++
 2 files changed, 33 insertions(+)

diff --git a/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java b/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java
index ade8efb..77ee171 100644
--- a/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java
+++ b/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java
@@ -1,5 +1,7 @@
 package de.tims.fleetstorm.matchfield;
 
+import java.util.Random;
+
 public class Matchfield {
 
 	private Coordinate[][] matchfield;
@@ -127,4 +129,27 @@ public class Matchfield {
 		return true;
 	}
 
+	public boolean setShipOnRandomPosition(int length) {
+		boolean success = false;
+		Coordinate origin = null;
+		int randomDirection;
+
+		do {
+
+			Random random = new Random();
+			int randomX = random.nextInt(this.size - length);
+			int randomY = random.nextInt(this.size - length);
+			origin = new Coordinate(randomX, randomY);
+
+			randomDirection = random.nextInt(2);
+
+			if (this.isFreePosition(origin, length, randomDirection)) {
+				success = this.setShip(new Coordinate(randomX, randomY), length, randomDirection);
+			}
+
+		} while (!success);
+
+		return true;
+	}
+
 }
diff --git a/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java
index b3f1205..d12852e 100644
--- a/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java
+++ b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java
@@ -152,4 +152,12 @@ class MatchfieldShipTest {
 				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));
 	}
+
+	@Test
+	void testIfRandomShipPositioningIsWorking() {
+		for (int shipLength = 2; shipLength <= 5; shipLength++) {
+			boolean calculatedResult = matchfield.setShipOnRandomPosition(shipLength);
+			assertTrue(calculatedResult);
+		}
+	}
 }