github.com/spf13/cast v1.3.1

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/spf13/cast@v1.3.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/spf13/cast@v1.3.1

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.

package sample

import (
	"testing"
	"time"

	"github.com/spf13/cast"
)

func TestContract_ToString(t *testing.T) {
	tests := []struct {
		input    interface{}
		expected string
	}{
		{123, "123"},
		{"hello", "hello"},
		{true, "true"},
		{nil, ""},
	}

	for _, tt := range tests {
		got := ToString(tt.input)
		if got != tt.expected {
			t.Fatalf("ToString(%v) = %q; want %q", tt.input, got, tt.expected)
		}
		if direct := cast.ToString(tt.input); direct != tt.expected {
			t.Fatalf("cast.ToString(%v) = %q; want %q", tt.input, direct, tt.expected)
		}
	}
}

func TestContract_ToInt(t *testing.T) {
	tests := []struct {
		input    interface{}
		expected int
	}{
		{"42", 42},
		{int64(100), 100},
		{true, 1},
		{false, 0},
	}

	for _, tt := range tests {
		got := ToInt(tt.input)
		if got != tt.expected {
			t.Fatalf("ToInt(%v) = %d; want %d", tt.input, got, tt.expected)
		}
		if direct := cast.ToInt(tt.input); direct != tt.expected {
			t.Fatalf("cast.ToInt(%v) = %d; want %d", tt.input, direct, tt.expected)
		}
	}
}

func TestContract_ToBool(t *testing.T) {
	tests := []struct {
		input    interface{}
		expected bool
	}{
		{"true", true},
		{"1", true},
		{1, true},
		{"false", false},
		{"0", false},
		{0, false},
		{nil, false},
	}

	for _, tt := range tests {
		got := ToBool(tt.input)
		if got != tt.expected {
			t.Fatalf("ToBool(%v) = %v; want %v", tt.input, got, tt.expected)
		}
		if direct := cast.ToBool(tt.input); direct != tt.expected {
			t.Fatalf("cast.ToBool(%v) = %v; want %v", tt.input, direct, tt.expected)
		}
	}
}

func TestContract_ToIntE(t *testing.T) {
	val, err := ToIntE("123")
	if err != nil || val != 123 {
		t.Fatalf("ToIntE(\"123\") failed: %v, %d", err, val)
	}

	_, err = ToIntE("not_an_int")
	if err == nil {
		t.Fatalf("expected error for ToIntE(\"not_an_int\"), got nil")
	}

	_, err = cast.ToIntE("invalid")
	if err == nil {
		t.Fatalf("expected error for cast.ToIntE(\"invalid\"), got nil")
	}
}

func TestContract_ToDuration(t *testing.T) {
	dur := ToDuration("10s")
	if dur != 10*time.Second {
		t.Fatalf("ToDuration(\"10s\") = %v; want 10s", dur)
	}
	if direct := cast.ToDuration("500ms"); direct != 500*time.Millisecond {
		t.Fatalf("cast.ToDuration(\"500ms\") = %v; want 500ms", direct)
	}
}

{"case":{"caseId":"case:sha256:c7e7fa7e141db92d7f3d24a3704951b444444d72d2271c0c90a38095bdb6cd12","contract":["cast.ToString converts various types to string","cast.ToInt converts valid string and numeric types to int","cast.ToBool converts truthy and falsy values to boolean","cast.ToIntE returns an error when given invalid strings","cast.ToDuration converts duration strings to time.Duration"],"goal":"verify pkg:golang/github.com/spf13/cast@v1.3.1","kind":"HOW","packages":["pkg:golang/github.com/spf13/cast@v1.3.1"],"schemaVersion":1},"contractCommand":["go","test","./..."],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/spf13/cast@v1.3.1"],"schemaVersion":1,"subject":"pkg:golang/github.com/spf13/cast@v1.3.1","verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require github.com/spf13/cast v1.3.1

github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/spf13/cast v1.3.1 h1:nFm6S0SMdyzrzcmThSipiEubIDy8WEXKNZ0UOgiRpng=
github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=

package sample

import (
	"time"

	"github.com/spf13/cast"
)

// ToString converts an arbitrary value into a string.
func ToString(val interface{}) string {
	return cast.ToString(val)
}

// ToInt converts an arbitrary value into an int.
func ToInt(val interface{}) int {
	return cast.ToInt(val)
}

// ToIntE converts an arbitrary value into an int, returning an error if conversion fails.
func ToIntE(val interface{}) (int, error) {
	return cast.ToIntE(val)
}

// ToBool converts an arbitrary value into a boolean.
func ToBool(val interface{}) bool {
	return cast.ToBool(val)
}

// ToDuration converts an arbitrary value into a time.Duration.
func ToDuration(val interface{}) time.Duration {
	return cast.ToDuration(val)
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/github.com/spf13/cast@v1.3.1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/spf13/cast@v1.3.1"
  ]
}