PlayerTests.cs

using System;
using System.Collections;
using Gameplay;
using NSubstitute;
using NUnit.Framework;
using UnityEditor;
using UnityEngine;
using UnityEngine.TestTools;
using Object = UnityEngine.Object;

namespace Tests.Gameplay
{
    public class PlayerTest
    {
        [UnityTest]
        public IEnumerator PlayerMovesRight()
        {
            RenderSettings.skybox = null;

            var root = new GameObject();

            root = Object.Instantiate(root);
            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/Prefabs/Player.prefab");
            prefab = Object.Instantiate(prefab, new Vector2(0, 0), new Quaternion(0, 0, 0, 0));
            if (!prefab)
            {
                throw new InvalidOperationException("Player prefab unable to instantiated");
            }

            var player = prefab.GetComponent<Player>();
            player.PlayerInput = Substitute.For<IPlayerInput>();
            player.PlayerInput.Horizontal.Returns(10f);

            yield return WaitForNFrames(30);

            Assert.IsTrue(player.transform.position.x > 0);

            Object.Destroy(player);
            Object.Destroy(root);
        }

        [UnityTest]
        public IEnumerator PlayerMovesLeft()
        {
            RenderSettings.skybox = null;

            var root = new GameObject();

            root = Object.Instantiate(root);
            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/Prefabs/Player.prefab");
            prefab = Object.Instantiate(prefab, new Vector2(0, 0), new Quaternion(0, 0, 0, 0));
            if (!prefab)
            {
                throw new InvalidOperationException("Player prefab unable to instantiated");
            }

            var player = prefab.GetComponent<Player>();
            player.PlayerInput = Substitute.For<IPlayerInput>();
            player.PlayerInput.Horizontal.Returns(-10f);

            yield return WaitForNFrames(30);

            Assert.IsTrue(player.transform.position.x < 0);

            Object.Destroy(player);
            Object.Destroy(root);
        }

        [UnityTest]
        public IEnumerator PlayerJumps()
        {
            RenderSettings.skybox = null;

            var root = new GameObject();

            root = Object.Instantiate(root);
            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/Prefabs/Player.prefab");
            prefab = Object.Instantiate(prefab, new Vector2(0, 0), new Quaternion(0, 0, 0, 0));
            if (!prefab)
            {
                throw new InvalidOperationException("Player prefab unable to instantiated");
            }

            var player = prefab.GetComponent<Player>();
            player.PlayerInput = Substitute.For<IPlayerInput>();

            player.PlayerInput.IsJumping.Returns(true);
            yield return WaitForNFrames(60);
            player.PlayerInput.IsJumping.Returns(false);

            yield return WaitForNFrames(30);
            Assert.IsTrue(player.transform.position.y > 0);

            Object.Destroy(player);
            Object.Destroy(root);
        }

        private IEnumerator WaitForNFrames(int n)
        {
            for (int i = 0; i < n; i++)
            {
                yield return new WaitForEndOfFrame();
            }
        }
    }
}