import { describe, expect, test } from "bun:test";

import { parseSize } from "../../../src/server/checker/utils";

describe("parseSize", () => {
  test("解析 B", () => {
    expect(parseSize("1024B")).toBe(1024);
    expect(parseSize("0B")).toBe(0);
  });

  test("解析 KB", () => {
    expect(parseSize("1KB")).toBe(1024);
    expect(parseSize("512KB")).toBe(524288);
  });

  test("解析 MB", () => {
    expect(parseSize("1MB")).toBe(1048576);
    expect(parseSize("100MB")).toBe(104857600);
  });

  test("解析 GB", () => {
    expect(parseSize("1GB")).toBe(1073741824);
  });

  test("解析小数", () => {
    expect(parseSize("1.5MB")).toBe(1572864);
    expect(parseSize("1.5KB")).toBe(1536);
  });

  test("数字直接返回", () => {
    expect(parseSize(2048)).toBe(2048);
  });

  test("数字 0 返回 0", () => {
    expect(parseSize(0)).toBe(0);
  });

  test("数字负数抛出错误", () => {
    expect(() => parseSize(-1)).toThrow("非负安全整数");
  });

  test("数字非整数抛出错误", () => {
    expect(() => parseSize(1.5)).toThrow("非负安全整数");
  });

  test("无效格式抛出错误", () => {
    expect(() => parseSize("100")).toThrow("无效的 size 格式");
    expect(() => parseSize("100MBB")).toThrow("无效的 size 格式");
    expect(() => parseSize("abc")).toThrow("无效的 size 格式");
    expect(() => parseSize("")).toThrow("无效的 size 格式");
  });

  test("字符串解析为非整数字节时抛出错误", () => {
    expect(() => parseSize("1.5B")).toThrow("非负安全整数字节数");
  });
});
