Added tests for UniformTile

src/main/java/model/UniformTile.java

@@ -26,4 +26,11 @@ public class UniformTile implements Tile{
   public int hashCode() {
     return side != null ? side.hashCode() : 0;
   }
+
+  @Override
+  public String toString() {
+    return "UniformTile{" +
+            "side=" + side +
+            '}';
+  }
 }

src/test/java/model/ColoredSideTest.java

@@ -58,5 +58,4 @@ public class ColoredSideTest {
     assertThat(redSide.toString()).isEqualTo("ColoredSide{color=0xff0000ff}");
     assertThat(blueSide.toString()).isEqualTo("ColoredSide{color=0x0000ffff}");
   }
-
 }

src/test/java/model/UniformTileTest.java

+package model;
+
+import javafx.scene.paint.Color;
+import org.junit.jupiter.api.Test;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class UniformTileTest {
+  @Test
+  void testSide(){
+    ColoredSide redSide = new ColoredSide(Color.RED);
+    Tile redTile = new UniformTile(redSide);
+    for (CardinalDirection direction : CardinalDirection.values())
+      assertThat(redTile.side(direction)).isEqualTo(redSide);
+  }
+
+  @Test
+  void testToString(){
+    ColoredSide redSide = new ColoredSide(Color.RED);
+    Tile redTile = new UniformTile(redSide);
+    assertThat(redTile.toString()).isEqualTo("UniformTile{side="+ redSide + "}");
+  }
+
+  @Test
+  void testEquals(){
+    ColoredSide redSide = new ColoredSide(Color.RED);
+    Tile redTile = new UniformTile(redSide);
+    Tile redTile2 = new UniformTile(redSide);
+    Tile blueSide = new UniformTile(new ColoredSide(Color.BLUE));
+    assertThat(redTile).isEqualTo(redTile);
+    assertThat(redTile).isEqualTo(redTile2);
+    assertThat(redTile).isNotEqualTo(blueSide);
+    assertThat(redTile).isNotEqualTo(EmptyTile.EMPTY_TILE);
+  }
+}