golang.org/x/text v0.3.4: language.Japanese

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/language.Japanese in pkg:golang/golang.org/x/text@v0.3.4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/text@v0.3.4
Demonstrate these symbols/APIs:
  - golang.org/x/text/language.Japanese

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:sha256:2bf5f3f3a03b9025ffa9939fe78599b5fd6ec5dc2673749926ccf735365ad4c6","contract":["language.Japanese.String() returns \"ja\" and equals language.Make(\"ja\")","language.Japanese.Base() returns base \"ja\" with confidence language.Exact","language.Japanese.Script() returns script \"Jpan\" with confidence language.High","language.NewMatcher([]language.Tag{language.English, language.Japanese}).Match(language.Make(\"ja-JP\")) returns index 1 with confidence language.Exact"],"goal":"verify golang.org/x/text/language.Japanese in pkg:golang/golang.org/x/text@v0.3.4","kind":"HOW","packages":["pkg:golang/golang.org/x/text@v0.3.4"],"schemaVersion":1,"symbols":["golang.org/x/text/language.Japanese"]},"contractCommand":["go","run","./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/golang.org/x/text@v0.3.4"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/text@v0.3.4","symbols":["golang.org/x/text/language.Japanese"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.21

require golang.org/x/text v0.3.4

golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=
golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/text/language.Japanese in pkg:golang/golang.org/x/text@v0.3.4",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/text@v0.3.4"
  ],
  "symbols": [
    "golang.org/x/text/language.Japanese"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	tag := language.Japanese
	if tag.String() != "ja" {
		fmt.Fprintf(os.Stderr, "expected language.Japanese.String() == \"ja\", got %q\n", tag.String())
		os.Exit(1)
	}

	if tag != language.Make("ja") {
		fmt.Fprintf(os.Stderr, "expected language.Japanese == language.Make(\"ja\")\n")
		os.Exit(1)
	}

	base, baseConf := tag.Base()
	if base.String() != "ja" || baseConf != language.Exact {
		fmt.Fprintf(os.Stderr, "expected Base() == (\"ja\", Exact), got (%q, %v)\n", base.String(), baseConf)
		os.Exit(1)
	}

	script, scriptConf := tag.Script()
	if script.String() != "Jpan" || scriptConf != language.High {
		fmt.Fprintf(os.Stderr, "expected Script() == (\"Jpan\", High), got (%q, %v)\n", script.String(), scriptConf)
		os.Exit(1)
	}

	matcher := language.NewMatcher([]language.Tag{language.English, language.Japanese})
	_, idx, matchConf := matcher.Match(language.Make("ja-JP"))
	if idx != 1 || matchConf != language.Exact {
		fmt.Fprintf(os.Stderr, "expected Match(ja-JP) index 1 with Exact confidence, got idx=%d conf=%v\n", idx, matchConf)
		os.Exit(1)
	}
}