added test for moveSpeed change by crystal fruit

src/test/java/pacmanTests/CellTest.java

@@ -87,4 +87,17 @@ class CellTest {
 		// assert
 		assertThat(expectedScore).isEqualTo(resultingScore);
 	}
+	
+	void cell_triggerItem_3crystalMoveSpeed() {
+		// arrange
+		GameManager gameManager = new GameManager();
+		Cell cell = gameManager.map.GetCell(new Vector2(0,0));
+		cell.type = "crystal";
+		int expectedMoveSpeed = 3;
+		// act
+		cell.triggerItem();
+		int resultingMoveSpeed = gameManager.moveSpeed;
+		// assert
+		assertThat(expectedMoveSpeed).isEqualTo(resultingMoveSpeed);
+	}
 }