golang.org/x/text v0.23.0: collate.New

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 golang.org/x/text/collate.New in pkg:golang/golang.org/x/text@v0.23.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/text@v0.23.0
Demonstrate these symbols/APIs:
  - golang.org/x/text/collate.New
Required runtime conditions:
  - ecosystem: golang
  - language: go
  - packageManager: go@1.26.6
  - runtime: go@1.26.6

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:sha256:66a27b45dcef5bf37838c0b22f0fe0d2487d58a1f6f03f2d30cfbfff4e0ce719","contract":["collate.New initializes a locale-sensitive Collator supporting case-insensitive string comparison via collate.IgnoreCase","collate.New respects language-specific alphabet ordering differences between German and Swedish","collate.New with collate.Numeric sorts embedded numbers by numerical value","collate.New with collate.Loose ignores case and diacritics when comparing Unicode strings"],"goal":"verify golang.org/x/text/collate.New in pkg:golang/golang.org/x/text@v0.23.0","kind":"HOW","packages":["pkg:golang/golang.org/x/text@v0.23.0"],"schemaVersion":1,"symbols":["golang.org/x/text/collate.New"]},"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/golang.org/x/text@v0.23.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/text@v0.23.0","symbols":["golang.org/x/text/collate.New"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require golang.org/x/text v0.23.0

golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=

package main

import (
	"fmt"

	"golang.org/x/text/collate"
	"golang.org/x/text/language"
)

func main() {
	// 1. Language-sensitive string comparison with case-insensitive option
	cCaseInsensitive := collate.New(language.English, collate.IgnoreCase)
	fmt.Printf("CompareString('apple', 'APPLE') with IgnoreCase: %d\n", cCaseInsensitive.CompareString("apple", "APPLE"))

	// 2. Locale-specific ordering differences
	cGerman := collate.New(language.German)
	cSwedish := collate.New(language.Swedish)
	fmt.Printf("German 'äpfel' vs 'zitrone': %d\n", cGerman.CompareString("äpfel", "zitrone"))
	fmt.Printf("Swedish 'äpple' vs 'zebra': %d\n", cSwedish.CompareString("äpple", "zebra"))

	// 3. Natural numeric sorting
	cNumeric := collate.New(language.English, collate.Numeric)
	files := []string{"file10", "file2", "file1"}
	cNumeric.SortStrings(files)
	fmt.Printf("Numerically sorted files: %v\n", files)

	// 4. Loose comparison ignoring accents and case
	cLoose := collate.New(language.English, collate.Loose)
	fmt.Printf("Loose compare 'cafe' vs 'Café': %d\n", cLoose.CompareString("cafe", "Café"))
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/text/collate.New in pkg:golang/golang.org/x/text@v0.23.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/text@v0.23.0"
  ],
  "symbols": [
    "golang.org/x/text/collate.New"
  ],
  "runtimeConditions": {
    "ecosystem": "golang",
    "language": "go",
    "packageManager": "go@1.26.6",
    "runtime": "go@1.26.6"
  }
}

package main

import (
	"fmt"
	"os"

	"golang.org/x/text/collate"
	"golang.org/x/text/language"
)

func main() {
	// Assertion 1: collate.New initializes a locale-sensitive Collator supporting case-insensitive string comparison via collate.IgnoreCase
	cDefault := collate.New(language.English)
	cIgnoreCase := collate.New(language.English, collate.IgnoreCase)

	if cDefault.CompareString("apple", "APPLE") == 0 {
		fmt.Fprintf(os.Stderr, "FAIL: default collate should distinguish case\n")
		os.Exit(1)
	}
	if res := cIgnoreCase.CompareString("apple", "APPLE"); res != 0 {
		fmt.Fprintf(os.Stderr, "FAIL: IgnoreCase expected 0, got %d\n", res)
		os.Exit(1)
	}
	if res := cIgnoreCase.CompareString("apple", "banana"); res >= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected 'apple' < 'banana', got %d\n", res)
		os.Exit(1)
	}
	if res := cIgnoreCase.CompareString("banana", "apple"); res <= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected 'banana' > 'apple', got %d\n", res)
		os.Exit(1)
	}

	// Assertion 2: collate.New respects language-specific alphabet ordering differences between German and Swedish
	cGerman := collate.New(language.German)
	cSwedish := collate.New(language.Swedish)
	if res := cGerman.CompareString("äpfel", "zitrone"); res >= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: German expected 'äpfel' < 'zitrone', got %d\n", res)
		os.Exit(1)
	}
	if res := cSwedish.CompareString("äpple", "zebra"); res <= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: Swedish expected 'äpple' > 'zebra', got %d\n", res)
		os.Exit(1)
	}

	// Assertion 3: collate.New with collate.Numeric sorts embedded numbers by numerical value
	cNumeric := collate.New(language.English, collate.Numeric)
	if res := cDefault.CompareString("file2", "file10"); res <= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: default expected 'file2' > 'file10', got %d\n", res)
		os.Exit(1)
	}
	if res := cNumeric.CompareString("file2", "file10"); res >= 0 {
		fmt.Fprintf(os.Stderr, "FAIL: numeric expected 'file2' < 'file10', got %d\n", res)
		os.Exit(1)
	}
	files := []string{"file10", "file2", "file1"}
	cNumeric.SortStrings(files)
	if files[0] != "file1" || files[1] != "file2" || files[2] != "file10" {
		fmt.Fprintf(os.Stderr, "FAIL: unexpected sort order: %v\n", files)
		os.Exit(1)
	}

	// Assertion 4: collate.New with collate.Loose ignores case and diacritics when comparing Unicode strings
	cLoose := collate.New(language.English, collate.Loose)
	if res := cLoose.CompareString("resume", "résumé"); res != 0 {
		fmt.Fprintf(os.Stderr, "FAIL: loose expected 'resume' == 'résumé', got %d\n", res)
		os.Exit(1)
	}
	if res := cLoose.CompareString("cafe", "Café"); res != 0 {
		fmt.Fprintf(os.Stderr, "FAIL: loose expected 'cafe' == 'Café', got %d\n", res)
		os.Exit(1)
	}

	fmt.Println("PASS: pkg:golang/golang.org/x/text@v0.23.0 collate.New contract verified")
}