Convex MCP server

import { QueryImpl } from "./query_impl.js";
import { test, expect } from "vitest";

// Mock to prevent
// "The Convex database and auth objects are being used outside of a Convex backend..." errors
(globalThis as any).Convex = {
  syscall: (_op: string, _jsonArgs: string) => {
    return "{}";
  },
  asyncSyscall: async (_op: string, _jsonArgs: string) => {
    return new Promise((resolve) => {
      resolve('{ "done": true, "value": null }');
    });
  },
};

function newQuery() {
  return new QueryImpl({
    source: {
      type: "FullTableScan",
      tableName: "messages",
      order: null,
    },
    operators: [],
  });
}

test("take does not throw if passed a non-negative integer", async () => {
  await newQuery().take(1);
});

test("take throws a TypeError if passed a float", async () => {
  const t = () => {
    return newQuery().take(1.5);
  };
  await expect(t).rejects.toThrow(TypeError);
  await expect(t).rejects.toThrow(/must be a non-negative integer/);
});

test("take throws a TypeError if passed a negative integer", async () => {
  const t = () => {
    return newQuery().take(-1);
  };
  await expect(t).rejects.toThrow(TypeError);
  await expect(t).rejects.toThrow(/must be a non-negative integer/);
});