import { expect, test } from "vitest"

import { assertBase64, base64ToString, isBase64, stringToBase64 } from "#Source/encoding/index.ts"

test("isBase64 validates Base64 input", () => {
  expect(isBase64("aGVsbG8=")).toBe(true)
  expect(isBase64("5L2g5aW9")).toBe(true)
  expect(isBase64("8J+Ri/CfjI0=")).toBe(true)
  expect(isBase64("aGVs\n bG8=")).toBe(true)

  expect(isBase64("%%%")).toBe(false)
  expect(isBase64("abc")).toBe(false)
})

test("assertBase64 throws on malformed input", () => {
  expect(() => assertBase64("aGVsbG8=")).not.toThrow()
  expect(() => assertBase64("aGVs\n bG8=")).not.toThrow()
  expect(() => assertBase64("%%%")).toThrow(TypeError)
  expect(() => assertBase64("abc")).toThrow(TypeError)
})

test("stringToBase64 converts UTF-8 text to Base64", () => {
  expect(stringToBase64("hello")).toBe("aGVsbG8=")
  expect(stringToBase64("你好")).toBe("5L2g5aW9")
  expect(stringToBase64("👋🌍")).toBe("8J+Ri/CfjI0=")
})

test("base64ToString converts Base64 to UTF-8 text and validates malformed input", () => {
  expect(base64ToString("aGVsbG8=")).toBe("hello")
  expect(base64ToString("5L2g5aW9")).toBe("你好")
  expect(base64ToString("8J+Ri/CfjI0=")).toBe("👋🌍")

  expect(() => base64ToString("%%%")).toThrow(TypeError)
  expect(() => base64ToString("abc")).toThrow(TypeError)
})