@xterm/xterm 5.5.0: initialize Terminal with custom rows and cols, write and read buffer

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: initialize Terminal with custom rows and cols, write and read buffer
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40xterm/xterm@5.5.0

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:af76dfdca8a53f2f5afea727c6e99f1a45938333dfcc759aff55ab04f27d6fa9","contract":["Terminal initializes with specified custom cols and rows dimensions","Terminal write appends text to the active buffer and invokes completion callback","Terminal buffer line can be read and translated to trimmed string","Terminal resize updates cols and rows dimensions","Terminal reset clears the active buffer lines","Terminal write handles multiline text with carriage return and line feed"],"goal":"initialize Terminal with custom rows and cols, write and read buffer","kind":"HOW","packages":["pkg:npm/%40xterm/xterm@5.5.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40xterm/xterm@5.5.0"],"schemaVersion":1,"subject":"pkg:npm/%40xterm/xterm@5.5.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-xterm",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-xterm",
      "version": "1.0.0",
      "dependencies": {
        "@xterm/xterm": "5.5.0"
      }
    },
    "node_modules/@xterm/xterm": {
      "version": "5.5.0",
      "resolved": "https://registry.npmjs.org/@xterm/xterm/-/xterm-5.5.0.tgz",
      "integrity": "sha512-hqJHYaQb5OptNunnyAnkHyM8aCjZ1MEIDTQu1iIbbTD/xops91NB5yq1ZK/dC2JDbVWtF23zUtl9JE2NqwT87A==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-xterm",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "@xterm/xterm": "5.5.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "initialize Terminal with custom rows and cols, write and read buffer",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40xterm/xterm@5.5.0"
  ]
}

import assert from 'node:assert/strict';
import pkg from '@xterm/xterm';

const { Terminal } = pkg;

// 1. Terminal initializes with specified custom cols and rows dimensions
{
  const term = new Terminal({ cols: 100, rows: 30 });
  assert.equal(term.cols, 100);
  assert.equal(term.rows, 30);
  term.dispose();
}

// 2. Terminal write appends text to the active buffer and invokes completion callback
await new Promise((resolve, reject) => {
  const term = new Terminal({ cols: 80, rows: 24 });
  term.write('CodeSampleX Terminal Test', () => {
    try {
      const line = term.buffer.active.getLine(0);
      assert.ok(line, 'Buffer line 0 should exist');
      assert.equal(line.translateToString(true), 'CodeSampleX Terminal Test');
      term.dispose();
      resolve();
    } catch (err) {
      term.dispose();
      reject(err);
    }
  });
});

// 3. Terminal buffer line can be read and translated to trimmed string
await new Promise((resolve, reject) => {
  const term = new Terminal({ cols: 80, rows: 24 });
  term.write('Buffer Read Test', () => {
    try {
      const line = term.buffer.active.getLine(0);
      assert.ok(line !== undefined && line !== null);
      assert.equal(line.translateToString(true), 'Buffer Read Test');
      term.dispose();
      resolve();
    } catch (err) {
      term.dispose();
      reject(err);
    }
  });
});

// 4. Terminal resize updates cols and rows dimensions
{
  const term = new Terminal({ cols: 80, rows: 24 });
  term.resize(120, 40);
  assert.equal(term.cols, 120);
  assert.equal(term.rows, 40);
  term.dispose();
}

// 5. Terminal reset clears the active buffer lines
await new Promise((resolve, reject) => {
  const term = new Terminal({ cols: 80, rows: 24 });
  term.write('Line before reset', () => {
    try {
      assert.equal(term.buffer.active.getLine(0)?.translateToString(true), 'Line before reset');
      term.reset();
      const lineAfterReset = term.buffer.active.getLine(0);
      assert.equal(lineAfterReset?.translateToString(true), '');
      term.dispose();
      resolve();
    } catch (err) {
      term.dispose();
      reject(err);
    }
  });
});

// 6. Terminal write handles multiline text with carriage return and line feed
await new Promise((resolve, reject) => {
  const term = new Terminal({ cols: 80, rows: 24 });
  term.write('First line\r\nSecond line', () => {
    try {
      const line0 = term.buffer.active.getLine(0);
      const line1 = term.buffer.active.getLine(1);
      assert.equal(line0?.translateToString(true), 'First line');
      assert.equal(line1?.translateToString(true), 'Second line');
      term.dispose();
      resolve();
    } catch (err) {
      term.dispose();
      reject(err);
    }
  });
});