github.com/iancoleman/strcase v0.3.0: ToSnake, ToCamel, ToLowerCamel

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 pkg:golang/github.com/iancoleman/strcase@v0.3.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/iancoleman/strcase@v0.3.0

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:sha256:2f10caf70958abdb859248427713ae408ebd23b3507dae406313bbbc5368e72b","contract":["strcase.ToSnake converts camelCase, PascalCase, and delimited strings to snake_case","strcase.ToCamel converts snake_case and kebab-case strings to CamelCase","strcase.ToLowerCamel converts snake_case and kebab-case strings to lowerCamelCase","strcase.ToKebab converts camelCase and snake_case strings to kebab-case","strcase.ToScreamingSnake converts mixed case strings to SCREAMING_SNAKE_CASE","strcase.ToDelimited converts strings to custom delimiter separated case"],"goal":"verify pkg:golang/github.com/iancoleman/strcase@v0.3.0","kind":"HOW","packages":["pkg:golang/github.com/iancoleman/strcase@v0.3.0"],"schemaVersion":1,"symbols":["strcase.ToSnake","strcase.ToCamel","strcase.ToLowerCamel","strcase.ToKebab","strcase.ToScreamingSnake","strcase.ToDelimited"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/iancoleman/strcase@v0.3.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/iancoleman/strcase@v0.3.0","symbols":["strcase.ToSnake","strcase.ToCamel","strcase.ToLowerCamel","strcase.ToKebab","strcase.ToScreamingSnake","strcase.ToDelimited"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require github.com/iancoleman/strcase v0.3.0

github.com/iancoleman/strcase v0.3.0 h1:nTXanmYxhfFAMjZL34Ov6gkzEsSJZ5DbhxWjvSASxEI=
github.com/iancoleman/strcase v0.3.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=

package main

import (
	"fmt"

	"github.com/iancoleman/strcase"
)

func main() {
	input := "AnyKindOfString"

	snake := strcase.ToSnake(input)
	camel := strcase.ToCamel(snake)
	lowerCamel := strcase.ToLowerCamel(input)
	kebab := strcase.ToKebab(input)
	screamingSnake := strcase.ToScreamingSnake(input)
	delimited := strcase.ToDelimited(input, '.')

	fmt.Printf("Original: %s\n", input)
	fmt.Printf("Snake: %s\n", snake)
	fmt.Printf("Camel: %s\n", camel)
	fmt.Printf("LowerCamel: %s\n", lowerCamel)
	fmt.Printf("Kebab: %s\n", kebab)
	fmt.Printf("ScreamingSnake: %s\n", screamingSnake)
	fmt.Printf("Delimited: %s\n", delimited)
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/github.com/iancoleman/strcase@v0.3.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/iancoleman/strcase@v0.3.0"
  ]
}

package main

import (
	"fmt"
	"os"

	"github.com/iancoleman/strcase"
)

func main() {
	// Assertion 1: strcase.ToSnake converts camelCase, PascalCase, and delimited strings to snake_case
	if got := strcase.ToSnake("AnyKindOfString"); got != "any_kind_of_string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToSnake(\"AnyKindOfString\") = %q, want \"any_kind_of_string\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToSnake("anyKindOfString"); got != "any_kind_of_string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToSnake(\"anyKindOfString\") = %q, want \"any_kind_of_string\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToSnake("any-kind-of-string"); got != "any_kind_of_string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToSnake(\"any-kind-of-string\") = %q, want \"any_kind_of_string\"\n", got)
		os.Exit(1)
	}

	// Assertion 2: strcase.ToCamel converts snake_case and kebab-case strings to CamelCase
	if got := strcase.ToCamel("any_kind_of_string"); got != "AnyKindOfString" {
		fmt.Fprintf(os.Stderr, "FAIL: ToCamel(\"any_kind_of_string\") = %q, want \"AnyKindOfString\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToCamel("any-kind-of-string"); got != "AnyKindOfString" {
		fmt.Fprintf(os.Stderr, "FAIL: ToCamel(\"any-kind-of-string\") = %q, want \"AnyKindOfString\"\n", got)
		os.Exit(1)
	}

	// Assertion 3: strcase.ToLowerCamel converts snake_case and kebab-case strings to lowerCamelCase
	if got := strcase.ToLowerCamel("AnyKindOfString"); got != "anyKindOfString" {
		fmt.Fprintf(os.Stderr, "FAIL: ToLowerCamel(\"AnyKindOfString\") = %q, want \"anyKindOfString\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToLowerCamel("any_kind_of_string"); got != "anyKindOfString" {
		fmt.Fprintf(os.Stderr, "FAIL: ToLowerCamel(\"any_kind_of_string\") = %q, want \"anyKindOfString\"\n", got)
		os.Exit(1)
	}

	// Assertion 4: strcase.ToKebab converts camelCase and snake_case strings to kebab-case
	if got := strcase.ToKebab("AnyKindOfString"); got != "any-kind-of-string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToKebab(\"AnyKindOfString\") = %q, want \"any-kind-of-string\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToKebab("any_kind_of_string"); got != "any-kind-of-string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToKebab(\"any_kind_of_string\") = %q, want \"any-kind-of-string\"\n", got)
		os.Exit(1)
	}

	// Assertion 5: strcase.ToScreamingSnake converts mixed case strings to SCREAMING_SNAKE_CASE
	if got := strcase.ToScreamingSnake("AnyKindOfString"); got != "ANY_KIND_OF_STRING" {
		fmt.Fprintf(os.Stderr, "FAIL: ToScreamingSnake(\"AnyKindOfString\") = %q, want \"ANY_KIND_OF_STRING\"\n", got)
		os.Exit(1)
	}
	if got := strcase.ToScreamingSnake("any-kind-of-string"); got != "ANY_KIND_OF_STRING" {
		fmt.Fprintf(os.Stderr, "FAIL: ToScreamingSnake(\"any-kind-of-string\") = %q, want \"ANY_KIND_OF_STRING\"\n", got)
		os.Exit(1)
	}

	// Assertion 6: strcase.ToDelimited converts strings to custom delimiter separated case
	if got := strcase.ToDelimited("AnyKindOfString", '.'); got != "any.kind.of.string" {
		fmt.Fprintf(os.Stderr, "FAIL: ToDelimited(\"AnyKindOfString\", '.') = %q, want \"any.kind.of.string\"\n", got)
		os.Exit(1)
	}

	fmt.Println("PASS: all pkg:golang/github.com/iancoleman/strcase@v0.3.0 contract assertions passed.")
}