heck 0.5.0: heck

# 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 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

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:e8fcf9c885f732b80f0b3d2c64a0d7dd919cdbffc25249804a4f3947e63e2112","contract":["ToSnakeCase converts CamelCase and spaced strings to snake_case","ToKebabCase converts mixed case and underscored strings to kebab-case","ToUpperCamelCase and ToPascalCase convert snake_case and kebab-case strings to UpperCamelCase","ToLowerCamelCase converts snake_case and PascalCase strings to lowerCamelCase","ToShoutySnakeCase and ToShoutyKebabCase convert identifiers to uppercase delimited forms","AsSnakeCase and Display adapters format strings without immediate heap allocation"],"goal":"verify heck in pkg:cargo/heck@0.5.0","kind":"HOW","packages":["pkg:cargo/heck@0.5.0"],"schemaVersion":1,"symbols":["heck"]},"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"],"verifierAdapter":"cargo@1"}

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

//! Clean-room verification sample for heck.

pub use heck::*;

use heck::{
    AsKebabCase, AsSnakeCase, ToKebabCase, ToLowerCamelCase, ToPascalCase, ToShoutyKebabCase,
    ToShoutySnakeCase, ToSnakeCase, ToTitleCase, ToTrainCase, ToUpperCamelCase,
};

fn main() {
    // 1. ToSnakeCase converts CamelCase and spaced strings to snake_case
    assert_eq!("HelloWorld".to_snake_case(), "hello_world");
    assert_eq!("hello world".to_snake_case(), "hello_world");
    assert_eq!("XMLHttpRequest".to_snake_case(), "xml_http_request");

    // 2. ToKebabCase converts mixed case and underscored strings to kebab-case
    assert_eq!("HelloWorld".to_kebab_case(), "hello-world");
    assert_eq!("hello_world".to_kebab_case(), "hello-world");
    assert_eq!("XML_HTTP_REQUEST".to_kebab_case(), "xml-http-request");

    // 3. ToUpperCamelCase and ToPascalCase convert snake_case and kebab-case strings to UpperCamelCase
    assert_eq!("hello_world".to_upper_camel_case(), "HelloWorld");
    assert_eq!("hello-world".to_pascal_case(), "HelloWorld");
    assert_eq!("xml_http_request".to_upper_camel_case(), "XmlHttpRequest");

    // 4. ToLowerCamelCase converts snake_case and PascalCase strings to lowerCamelCase
    assert_eq!("hello_world".to_lower_camel_case(), "helloWorld");
    assert_eq!("HelloWorld".to_lower_camel_case(), "helloWorld");
    assert_eq!("XML_HTTP_REQUEST".to_lower_camel_case(), "xmlHttpRequest");

    // 5. ToShoutySnakeCase and ToShoutyKebabCase convert identifiers to uppercase delimited forms
    assert_eq!("helloWorld".to_shouty_snake_case(), "HELLO_WORLD");
    assert_eq!("helloWorld".to_shouty_kebab_case(), "HELLO-WORLD");
    assert_eq!("hello_world".to_title_case(), "Hello World");
    assert_eq!("hello_world".to_train_case(), "Hello-World");

    // 6. AsSnakeCase and Display adapters format strings without immediate heap allocation
    assert_eq!(format!("{}", AsSnakeCase("HelloWorld")), "hello_world");
    assert_eq!(format!("{}", AsKebabCase("HelloWorld")), "hello-world");

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