import assert from "node:assert/strict";import { test } from "node:test";import { connect, textOf } from "./connect.ts";test("initialize reports the server and its tools capability", async () => {  const client = await connect();  assert.equal(client.getServerVersion()?.name, "mcp-tools");  assert.ok(client.getServerCapabilities()?.tools);  await client.close();});test("tools/list returns each tool with its schemas and read-only hint", async () => {  const client = await connect();  const { tools } = await client.listTools();  assert.deepEqual(tools.map((t) => t.name), ["convert_units"]);  const [convert] = tools;  assert.deepEqual(convert.inputSchema.required, ["value", "from", "to"]);  assert.ok(convert.outputSchema?.properties?.result);  assert.equal(convert.annotations?.readOnlyHint, true);  await client.close();});test("tools/call returns structured content and the same JSON as text", async () => {  const client = await connect();  const result = await client.callTool({ name: "convert_units", arguments: { value: 5, from: "km", to: "m" } });  assert.equal(result.isError, undefined);  assert.deepEqual(result.structuredContent, { quantity: "length", value: 5, from: "km", result: 5000, to: "m" });  assert.deepEqual(JSON.parse(textOf(result)), result.structuredContent);  await client.close();});test("a ToolError comes back as an isError result, not a protocol error", async () => {  const client = await connect();  const result = await client.callTool({ name: "convert_units", arguments: { value: 1, from: "kg", to: "m" } });  assert.equal(result.isError, true);  assert.match(textOf(result), /Cannot convert kg \(mass\) to m \(length\)/);  await client.close();});test("arguments that fail the input schema come back as an isError result", async () => {  const client = await connect();  const result = await client.callTool({ name: "convert_units", arguments: { value: "ten", from: "km", to: "m" } });  assert.equal(result.isError, true);  assert.match(textOf(result), /Invalid arguments for tool convert_units/);  await client.close();});