method Assert.prototype.strictEqual Assert.prototype.strictEqual(actual: unknown,expected: unknown,message?: string): void Asserts that actual === expected (strict equality, no type coercion). Examples Example 1 assert.strictEqual(1 + 1, 2); assert.strictEqual(typeof "hello", "string"); Parameters actual: unknown The actual value. expected: unknown The expected value. optional message: string Optional failure message. Return Type void