import { describe, it, expect } from 'vitest'
import { Result } from '../../src/lib/utilities/result'

describe('Result', () => {
    it('should create a success result correctly', () => {
        const successValue = 'Success value'
        const result = Result.ok(successValue)

        expect(result.isOk()).toBe(true)
        expect(result.isErr()).toBe(false)
        expect(result.inner).toBe(successValue)
    })

    it('should create an error result correctly', () => {
        const errorMessage = 'Error message'
        const result = Result.err(errorMessage)

        expect(result.isOk()).toBe(false)
        expect(result.isErr()).toBe(true)
        expect(result.inner).toBe(errorMessage)
    })

    it('should type guard success and error results correctly', () => {
        const successResult = Result.ok(123)
        const errorResult = Result.err('Error')

        if (successResult.isOk()) {
            expect(typeof successResult.inner).toBe('number')
        } else {
            throw new Error('Expected successResult to be ok')
        }

        if (errorResult.isErr()) {
            expect(typeof errorResult.inner).toBe('string')
        } else {
            throw new Error('Expected errorResult to be fail')
        }
    })
})