heck 0.5.0: heck::AsSnakeCase

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

[[package]]
name = "heck"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"

[[package]]
name = "sample-heck"
version = "1.0.0"
dependencies = [
 "heck",
]

[package]
name = "sample-heck"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
heck = "=0.5.0"

[[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 heck::AsSnakeCase in pkg:cargo/heck@0.5.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/heck@0.5.0
Demonstrate these symbols/APIs:
  - heck::AsSnakeCase

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:a4232d7fc3e8224ac76dc1f2871ad91d0c49de38ba31b799667fb49b5d20af09","contract":["AsSnakeCase wraps a string slice and formats as snake_case via Display","AsSnakeCase converts kebab-case and SHOUTY_SNAKE_CASE to snake_case","AsSnakeCase handles mixed delimiters and spaces","AsSnakeCase supports owned String and custom AsRef\u003cstr\u003e types","AsSnakeCase preserves already snake_cased strings and handles empty input"],"goal":"verify heck::AsSnakeCase in pkg:cargo/heck@0.5.0","kind":"HOW","packages":["pkg:cargo/heck@0.5.0"],"schemaVersion":1,"symbols":["heck::AsSnakeCase"]},"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/heck@0.5.0"],"schemaVersion":1,"subject":"pkg:cargo/heck@0.5.0","symbols":["heck::AsSnakeCase"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify heck::AsSnakeCase in pkg:cargo/heck@0.5.0",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/heck@0.5.0"
  ],
  "symbols": [
    "heck::AsSnakeCase"
  ]
}

//! Clean-room verification sample for heck::AsSnakeCase.

pub use heck::*;

use heck::AsSnakeCase;

fn main() {
    // 1. AsSnakeCase wraps a string slice and formats as snake_case via Display
    assert_eq!(
        format!("{}", AsSnakeCase("CamelCase")),
        "camel_case"
    );
    assert_eq!(
        AsSnakeCase("We are going to inherit the earth.").to_string(),
        "we_are_going_to_inherit_the_earth"
    );

    // 2. AsSnakeCase converts kebab-case and SHOUTY_SNAKE_CASE to snake_case
    assert_eq!(
        format!("{}", AsSnakeCase("kebab-case")),
        "kebab_case"
    );
    assert_eq!(
        format!("{}", AsSnakeCase("SHOUTY_SNAKE_CASE")),
        "shouty_snake_case"
    );

    // 3. AsSnakeCase handles mixed delimiters and spaces
    assert_eq!(
        format!("{}", AsSnakeCase("MixedUP CamelCase, with some Spaces")),
        "mixed_up_camel_case_with_some_spaces"
    );

    // 4. AsSnakeCase supports owned String and custom AsRef<str> types
    let s = String::from("CustomFieldIdentifier");
    assert_eq!(
        format!("{}", AsSnakeCase(s)),
        "custom_field_identifier"
    );

    // 5. AsSnakeCase preserves already snake_cased strings and handles empty input
    assert_eq!(
        format!("{}", AsSnakeCase("already_snake_case")),
        "already_snake_case"
    );
    assert_eq!(
        format!("{}", AsSnakeCase("")),
        ""
    );

    println!("All heck::AsSnakeCase contract assertions passed successfully.");
}