import { afterAll, beforeEach, describe, expect, it } from "vitest";
import { loadRuntimeConfig } from "../src/config/runtime.js";
const BASE_ENV = { ...process.env };
beforeEach(() => {
process.env = { ...BASE_ENV };
});
afterAll(() => {
process.env = { ...BASE_ENV };
});
describe("runtime configuration", () => {
it("defaults to stdio transport", () => {
delete process.env.MCP_TRANSPORT;
const config = loadRuntimeConfig();
expect(config.transport).toEqual({ kind: "stdio" });
expect(config.httpInitializeTimeoutMs).toBe(45_000);
});
it("configures http transport when requested", () => {
process.env.MCP_TRANSPORT = "http";
process.env.MCP_HTTP_PORT = "8080";
process.env.MCP_HTTP_HOST = "127.0.0.1";
process.env.MCP_HTTP_CORS_ALLOW_ORIGIN = "https://example.com";
process.env.MCP_HTTP_CORS_ALLOW_HEADERS = "X-Test";
process.env.MCP_HTTP_CORS_ALLOW_METHODS = "POST";
process.env.MCP_HTTP_ENABLE_JSON_RESPONSE = "false";
process.env.MCP_HTTP_ALLOWED_HOSTS = "example.com,api.example.com";
process.env.MCP_HTTP_ALLOWED_ORIGINS = "https://example.com";
process.env.MCP_HTTP_ENABLE_DNS_REBINDING_PROTECTION = "true";
process.env.MCP_HTTP_INITIALIZE_TIMEOUT_MS = "120000";
const config = loadRuntimeConfig();
expect(config.transport.kind).toBe("http");
if (config.transport.kind !== "http") {
throw new Error("Expected HTTP transport configuration");
}
expect(config.transport.port).toBe(8080);
expect(config.transport.host).toBe("127.0.0.1");
expect(config.transport.corsAllowOrigin).toBe("https://example.com");
expect(config.transport.corsAllowHeaders).toBe("X-Test");
expect(config.transport.corsAllowMethods).toBe("POST");
expect(config.transport.enableJsonResponse).toBe(false);
expect(config.transport.allowedHosts).toEqual(["example.com", "api.example.com"]);
expect(config.transport.allowedOrigins).toEqual(["https://example.com"]);
expect(config.transport.enableDnsRebindingProtection).toBe(true);
expect(config.transport.initializeTimeoutMs).toBe(120_000);
expect(config.httpInitializeTimeoutMs).toBe(120_000);
});
it("falls back to default http timeout when override invalid", () => {
process.env.MCP_HTTP_INITIALIZE_TIMEOUT_MS = "-5";
const config = loadRuntimeConfig();
expect(config.httpInitializeTimeoutMs).toBe(45_000);
});
});
