Version: 2018.1
public static void IsFalse (bool condition);
public static void IsFalse (bool condition, string message);

Parameters

condition true or false.
messageThe string used to describe the result of the Assert.

Description

Return true when the condition is false. Otherwise return false.

using UnityEngine;
using UnityEngine.Assertions;

public class AssertionExampleClass : MonoBehaviour { GameObject go;

void Update() { // Make sure the Game Object is never in active state Assert.IsFalse(go.activeSelf); } }