import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { fetchJson, BITBANK_API_BASE, DEFAULT_RETRIES } from './http.js';
describe('定数', () => {
it('BITBANK_API_BASE が正しい', () => {
expect(BITBANK_API_BASE).toBe('https://public.bitbank.cc');
});
it('DEFAULT_RETRIES が 2', () => {
expect(DEFAULT_RETRIES).toBe(2);
});
});
describe('fetchJson', () => {
const originalFetch = globalThis.fetch;
afterEach(() => {
globalThis.fetch = originalFetch;
vi.restoreAllMocks();
});
it('成功レスポンスを JSON としてパースする', async () => {
const mockData = { success: 1, data: { price: 15000000 } };
globalThis.fetch = vi.fn().mockResolvedValue({
ok: true,
json: () => Promise.resolve(mockData),
});
const result = await fetchJson('https://example.com/api');
expect(result).toEqual(mockData);
expect(globalThis.fetch).toHaveBeenCalledTimes(1);
});
it('HTTP エラーで例外を投げる', async () => {
globalThis.fetch = vi.fn().mockResolvedValue({
ok: false,
status: 500,
statusText: 'Internal Server Error',
});
await expect(
fetchJson('https://example.com/api', { retries: 0 }),
).rejects.toThrow('HTTP 500');
});
it('リトライ後に成功する', async () => {
let callCount = 0;
globalThis.fetch = vi.fn().mockImplementation(() => {
callCount++;
if (callCount === 1) {
return Promise.reject(new Error('network error'));
}
return Promise.resolve({
ok: true,
json: () => Promise.resolve({ ok: true }),
});
});
const result = await fetchJson('https://example.com/api', { retries: 1 });
expect(result).toEqual({ ok: true });
expect(globalThis.fetch).toHaveBeenCalledTimes(2);
});
it('全リトライ失敗で最後のエラーを投げる', async () => {
globalThis.fetch = vi.fn().mockRejectedValue(new Error('persistent error'));
await expect(
fetchJson('https://example.com/api', { retries: 1 }),
).rejects.toThrow('persistent error');
expect(globalThis.fetch).toHaveBeenCalledTimes(2); // 初回 + 1リトライ
});
});
