Refactoring MatchfieldShipTest class: added description for tests and outsourced multiple tests into more functions

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

@@ -1,6 +1,7 @@
 
 package de.tims.fleetstorm.matchfield;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
@@ -28,7 +29,7 @@ class MatchfieldShipTest {
 				shipSetCounter++;
 		}
 
-		assertTrue(shipSetCounter == length);
+		assertThat(shipSetCounter).describedAs(testName).isEqualTo(length);
 	}
 
 	static Stream<Arguments> testShipPositioning() {
@@ -57,10 +58,10 @@ class MatchfieldShipTest {
 		boolean calculatedResult = matchfield.setShip(coordinate, length, direction);
 
 		if (expectedResult)
-			assertTrue(calculatedResult);
+			assertThat(calculatedResult).describedAs(testName).isEqualTo(true);
 
 		if (!expectedResult)
-			assertFalse(calculatedResult);
+			assertThat(calculatedResult).describedAs(testName).isEqualTo(false);
 	}
 
 	static Stream<Arguments> testShipPositioningFailed() {
@@ -77,28 +78,38 @@ class MatchfieldShipTest {
 		matchfield.createMatchfield();
 
 		matchfield.setShip(new Coordinate(0, 0), 5, 1);
-		assertFalse(matchfield.setShip(new Coordinate(0, 1), 5, 1));
+		assertThat(matchfield.setShip(new Coordinate(0, 1), 5, 1)).describedAs("set ship on coordinate with ship")
+				.isEqualTo(false);
 
-		assertTrue(matchfield.setShip(new Coordinate(1, 1), 4, 0));
-		assertFalse(matchfield.setShip(new Coordinate(4, 1), 2, 1));
+		assertThat(matchfield.setShip(new Coordinate(1, 1), 4, 0)).describedAs("set ship on coordinate without ship")
+				.isEqualTo(true);
+		assertThat(matchfield.setShip(new Coordinate(4, 1), 2, 1))
+				.describedAs("set second ship on coordinate without ship").isEqualTo(false);
 	}
 
 	@Test
-	void testIfAllShipsOnMatchfieldHit() {
+	void testIfAllShipsHitReturnsFalseWhenNoShipIsHit() {
 		Matchfield matchfield = new Matchfield(10);
 		matchfield.createMatchfield();
 
 		matchfield.setShip(new Coordinate(0, 0), 5, 1);
-
 		boolean calulatedResult = matchfield.areAllShipsHit();
 		assertFalse(calulatedResult);
+	}
 
+	@Test
+	void testIfAllShipsHitReturnsTrueWhenAllShipsAreHit() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(new Coordinate(0, 0), 5, 1);
 		matchfield.getField(0, 0).setState(Coordinate.HIT);
 		matchfield.getField(0, 1).setState(Coordinate.HIT);
 		matchfield.getField(0, 2).setState(Coordinate.HIT);
 		matchfield.getField(0, 3).setState(Coordinate.HIT);
 		matchfield.getField(0, 4).setState(Coordinate.HIT);
-		calulatedResult = matchfield.areAllShipsHit();
+
+		boolean calulatedResult = matchfield.areAllShipsHit();
 		assertTrue(calulatedResult);
 	}
 }