sattle/src/lnurlcash/test-utils.ts

// Shared test scaffolding: an in-memory localStorage (Node has none outside
// a browser) plus the mock-mint helpers every suite uses.

import {vi} from 'vitest'
import {parseJsonArray, parseJsonObject, parseJsonObjectArray} from './jsonParsing'

export {parseJsonArray, parseJsonObject, parseJsonObjectArray}

export class LocalStorageStub {
  private map = new Map<string, string>()
  getItem = (key: string): string | null => this.map.get(key) ?? null
  setItem = (key: string, value: string): void => {
    this.map.set(key, String(value))
  }
  removeItem = (key: string): void => {
    this.map.delete(key)
  }
  clear = (): void => {
    this.map.clear()
  }
  get length(): number {
    return this.map.size
  }
  key = (index: number): string | null => [...this.map.keys()][index] ?? null
}

export const stubLocalStorage = (): LocalStorageStub => {
  const stub = new LocalStorageStub()
  vi.stubGlobal('localStorage', stub)
  return stub
}

export const requiredValue = <T>(
  value: T | null | undefined,
  message = 'Expected test value to be present',
): T => {
  if (value === null || value === undefined) throw new TypeError(message)
  return value
}

export const requiredString = (value: unknown, message = 'Expected a string value'): string => {
  if (typeof value !== 'string') throw new TypeError(message)
  return value
}