feat: add http smoke tests.

tests/api/helpers/http-client.ts

@@ -0,0 +1,98 @@
+type JsonValue =
+  | Record<string, unknown>
+  | Array<unknown>
+  | string
+  | number
+  | boolean
+  | null;
+
+function mergeCookieHeaders(
+  currentCookieHeader: string,
+  setCookies: string[],
+): string {
+  const cookies = new Map<string, string>();
+
+  for (const value of currentCookieHeader.split("; ")) {
+    if (!value) {
+      continue;
+    }
+
+    const [name, ...rest] = value.split("=");
+    cookies.set(name, rest.join("="));
+  }
+
+  for (const value of setCookies) {
+    const [cookiePair] = value.split(";");
+    const [name, ...rest] = cookiePair.split("=");
+    cookies.set(name, rest.join("="));
+  }
+
+  return Array.from(cookies.entries())
+    .map(([name, value]) => `${name}=${value}`)
+    .join("; ");
+}
+
+export class ApiHttpClient {
+  constructor(
+    private readonly baseUrl: string,
+    private cookieHeader = "",
+  ) {}
+
+  getCookieHeader() {
+    return this.cookieHeader;
+  }
+
+  withApiKey(apiKey: string) {
+    return {
+      get: (path: string) =>
+        this.request("GET", path, undefined, { "x-api-key": apiKey }),
+      post: (path: string, body?: JsonValue) =>
+        this.request("POST", path, body, { "x-api-key": apiKey }),
+      patch: (path: string, body?: JsonValue) =>
+        this.request("PATCH", path, body, { "x-api-key": apiKey }),
+      delete: (path: string) =>
+        this.request("DELETE", path, undefined, { "x-api-key": apiKey }),
+    };
+  }
+
+  async request(
+    method: string,
+    path: string,
+    body?: JsonValue,
+    headers: HeadersInit = {},
+  ) {
+    const requestHeaders = new Headers({
+      origin: new URL(this.baseUrl).origin,
+      ...(body ? { "content-type": "application/json" } : {}),
+      ...(this.cookieHeader ? { cookie: this.cookieHeader } : {}),
+    });
+
+    new Headers(headers).forEach((value, name) => {
+      requestHeaders.set(name, value);
+    });
+
+    const response = await fetch(`${this.baseUrl}${path}`, {
+      method,
+      headers: requestHeaders,
+      ...(body ? { body: JSON.stringify(body) } : {}),
+    });
+
+    const setCookies = response.headers.getSetCookie?.() ?? [];
+    if (setCookies.length > 0) {
+      this.cookieHeader = mergeCookieHeaders(this.cookieHeader, setCookies);
+    }
+
+    const text = await response.text();
+    let json: unknown = null;
+
+    if (text) {
+      try {
+        json = JSON.parse(text);
+      } catch {
+        json = text;
+      }
+    }
+
+    return { response, json, text };
+  }
+}