import { describe, expect, it } from "@effect/vitest"; import { isProbableMcpEndpoint } from "./probe-url"; describe("isProbableMcpEndpoint", () => {  it("rejects the prefixes a URL passes through while it is typed", () => {    for (const typed of [      "",      "  ",      "h",      "ht",      "htt",      "http",      "http:",      "http:/",      "http://",      "http://a",      "http://example",      "https://mcp",      "https://mcp.",      "https://.com",    ]) {      expect(isProbableMcpEndpoint(typed), typed).toBe(false);    }  });   it("accepts a finished http(s) endpoint", () => {    for (const finished of [      "https://mcp.example.com",      "https://mcp.example.com/mcp",      "http://example.com:4789/mcp?codemode=false",      "https://example.co.uk/sse",      "  https://mcp.example.com/mcp  ",      "HTTPS://MCP.EXAMPLE.COM/mcp",    ]) {      expect(isProbableMcpEndpoint(finished), finished).toBe(true);    }  });   it("accepts local development hosts, which have no dot to wait for", () => {    for (const local of [      "http://localhost",      "http://localhost:4789/mcp",      "http://app.localhost:4789/mcp",      "http://127.0.0.1:4789/mcp",      "http://[::1]:4789/mcp",    ]) {      expect(isProbableMcpEndpoint(local), local).toBe(true);    }  });   it("rejects schemes the MCP remote transport cannot dial", () => {    for (const wrongScheme of [      "ftp://mcp.example.com",      "ws://mcp.example.com",      "file:///tmp/mcp",      "mailto:someone@example.com",      "npx @example/mcp-server",    ]) {      expect(isProbableMcpEndpoint(wrongScheme), wrongScheme).toBe(false);    }  });});