is_terminal_polyfill 1.70.2: is_terminal_polyfill

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4

[[package]]
name = "is_terminal_polyfill"
version = "1.70.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"

[[package]]
name = "sample-is-terminal-polyfill"
version = "1.0.0"
dependencies = [
 "is_terminal_polyfill",
]

[package]
name = "sample-is-terminal-polyfill"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
is_terminal_polyfill = "=1.70.2"

[[bin]]
name = "contract"
path = "test/contract.rs"

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 is_terminal_polyfill in pkg:cargo/is_terminal_polyfill@1.70.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/is_terminal_polyfill@1.70.2
Demonstrate these symbols/APIs:
  - is_terminal_polyfill

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:f843ddf78977a3cb924e72ab5edec1cd89e1832e677ce504cb3d7c4ad4ac4989","contract":["IsTerminal trait is implemented for standard streams Stdin, Stdout, and Stderr","IsTerminal trait is implemented for stream locks StdinLock, StdoutLock, and StderrLock","IsTerminal returns false for regular disk files","is_terminal method can be invoked via trait method syntax and fully qualified syntax"],"goal":"verify is_terminal_polyfill in pkg:cargo/is_terminal_polyfill@1.70.2","kind":"HOW","packages":["pkg:cargo/is_terminal_polyfill@1.70.2"],"schemaVersion":1,"symbols":["is_terminal_polyfill"]},"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/is_terminal_polyfill@1.70.2"],"schemaVersion":1,"subject":"pkg:cargo/is_terminal_polyfill@1.70.2","symbols":["is_terminal_polyfill"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify is_terminal_polyfill in pkg:cargo/is_terminal_polyfill@1.70.2",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/is_terminal_polyfill@1.70.2"
  ],
  "symbols": [
    "is_terminal_polyfill"
  ]
}

//! Clean-room verification sample for is_terminal_polyfill.

pub use is_terminal_polyfill::*;

use is_terminal_polyfill::IsTerminal;
use std::fs::File;
use std::io::{self, Stderr, Stdin, Stdout};

fn main() {
    // 1. IsTerminal trait is implemented for standard streams Stdin, Stdout, and Stderr
    let stdin: Stdin = io::stdin();
    let stdout: Stdout = io::stdout();
    let stderr: Stderr = io::stderr();

    let stdin_term: bool = stdin.is_terminal();
    let stdout_term: bool = stdout.is_terminal();
    let stderr_term: bool = stderr.is_terminal();

    let _ = (stdin_term, stdout_term, stderr_term);

    // 2. IsTerminal trait is implemented for stream locks StdinLock, StdoutLock, and StderrLock
    let stdin_lock = stdin.lock();
    let stdout_lock = stdout.lock();
    let stderr_lock = stderr.lock();

    let stdin_lock_term: bool = stdin_lock.is_terminal();
    let stdout_lock_term: bool = stdout_lock.is_terminal();
    let stderr_lock_term: bool = stderr_lock.is_terminal();

    assert_eq!(stdin_lock_term, stdin_term);
    assert_eq!(stdout_lock_term, stdout_term);
    assert_eq!(stderr_lock_term, stderr_term);

    drop(stdin_lock);
    drop(stdout_lock);
    drop(stderr_lock);

    // 3. IsTerminal returns false for regular disk files
    if let Ok(file) = File::open("Cargo.toml") {
        assert!(!file.is_terminal(), "Regular file Cargo.toml must not be a terminal");
    }

    let temp_path = std::env::temp_dir().join("is_terminal_polyfill_test.tmp");
    if let Ok(file) = File::create(&temp_path) {
        assert!(!file.is_terminal(), "Temporary disk file must not be a terminal");
        drop(file);
        let _ = std::fs::remove_file(temp_path);
    }

    // 4. is_terminal method can be invoked via trait method syntax and fully qualified syntax
    let fq_stdout_term: bool = <Stdout as IsTerminal>::is_terminal(&stdout);
    assert_eq!(fq_stdout_term, stdout_term);

    let fq_stderr_term: bool = <Stderr as IsTerminal>::is_terminal(&stderr);
    assert_eq!(fq_stderr_term, stderr_term);

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