anstream 1.0.0: anstream

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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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: verify anstream in pkg:cargo/anstream@1.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/anstream@1.0.0
Demonstrate these symbols/APIs:
  - anstream

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:sha256:3a4aea983ff3ff91534c745b3568ed0877cd55a79aea2429068c886b65ca2a0b","contract":["AutoStream::always_ansi preserves ANSI escape codes when writing to stream","AutoStream::never strips ANSI escape codes from written output","StripStream strips ANSI escape sequences unconditionally","AutoStream::new configures stream behavior according to ColorChoice","anstream::adapter::strip_str removes ANSI escape codes from string references"],"goal":"verify anstream in pkg:cargo/anstream@1.0.0","kind":"HOW","packages":["pkg:cargo/anstream@1.0.0"],"schemaVersion":1,"symbols":["anstream"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","distro":"alpine","ecosystem":"cargo","libc":"musl","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/anstream@1.0.0"],"schemaVersion":1,"subject":"pkg:cargo/anstream@1.0.0","symbols":["anstream"],"verifierAdapter":"cargo@1"}

{
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  "goal": "verify anstream in pkg:cargo/anstream@1.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/anstream@1.0.0"
  ],
  "symbols": [
    "anstream"
  ]
}

//! Clean-room verification sample for anstream.

pub use anstream::*;

use anstream::adapter::strip_str;
use anstream::{AutoStream, ColorChoice, StripStream};
use std::io::Write;

fn main() {
    // 1. AutoStream::always_ansi preserves ANSI escape codes when writing to stream
    let mut stream = AutoStream::always_ansi(Vec::new());
    write!(stream, "\x1b[31mred text\x1b[0m").expect("write to always_ansi");
    assert_eq!(stream.into_inner(), b"\x1b[31mred text\x1b[0m");

    // 2. AutoStream::never strips ANSI escape codes from written output
    let mut stream = AutoStream::never(Vec::new());
    write!(stream, "\x1b[32mgreen text\x1b[0m").expect("write to never");
    assert_eq!(stream.into_inner(), b"green text");

    // 3. StripStream strips ANSI escape sequences unconditionally
    let mut stream = StripStream::new(Vec::new());
    write!(stream, "\x1b[1mbold\x1b[0m and \x1b[4munderline\x1b[0m").expect("write to StripStream");
    assert_eq!(stream.into_inner(), b"bold and underline");

    // 4. AutoStream::new configures stream behavior according to ColorChoice
    let mut never_stream = AutoStream::new(Vec::new(), ColorChoice::Never);
    write!(never_stream, "\x1b[33myellow\x1b[0m").expect("write to never_stream");
    assert_eq!(never_stream.into_inner(), b"yellow");

    let mut ansi_stream = AutoStream::new(Vec::new(), ColorChoice::AlwaysAnsi);
    write!(ansi_stream, "\x1b[34mblue\x1b[0m").expect("write to ansi_stream");
    assert_eq!(ansi_stream.into_inner(), b"\x1b[34mblue\x1b[0m");

    // 5. anstream::adapter::strip_str removes ANSI escape codes from string references
    let styled = "\x1b[31;1mError:\x1b[0m file not found";
    let stripped = strip_str(styled).to_string();
    assert_eq!(stripped, "Error: file not found");

    println!("All anstream contract assertions passed successfully.");
}