google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440

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/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440

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:sha256:7ae0afa6820b9901b19cbc266e01764b91da24fd6c05ef95a743d01c1bd1559d","contract":["date.Date.GetYear, GetMonth, and GetDay return zero values on nil or uninitialized instances, and return set values on populated instances.","latlng.LatLng.GetLatitude and GetLongitude return 0.0 on nil instances, and return configured coordinates on populated instances.","date.Date serializes to protobuf bytes and unmarshals back preserving year, month, and day.","latlng.LatLng serializes to protobuf bytes and unmarshals back preserving latitude and longitude coordinates.","date.Date.Reset clears all fields restoring the instance to its zero state.","latlng.LatLng.Reset clears latitude and longitude restoring the instance to its zero state."],"goal":"verify pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440"],"schemaVersion":1},"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/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440","verifierAdapter":"golang@1"}

module example.com/verify

go 1.26.6

require (
	github.com/golang/protobuf v1.2.0
	google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440
)

cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 h1:bjcUS9ztw9kFmmIxJInhon/0Is3p+EHBKNgquIzo1OI=
golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440 h1:VOR2wHHZJgoALLvnlCN4JUaWACO1lOLXiSN2F3g/GXU=
google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

package main

import (
	"fmt"

	"github.com/golang/protobuf/proto"
	"google.golang.org/genproto/googleapis/type/date"
	"google.golang.org/genproto/googleapis/type/latlng"
)

func main() {
	d := &date.Date{
		Year:  2026,
		Month: 9,
		Day:   18,
	}
	fmt.Printf("Date: %04d-%02d-%02d\n", d.GetYear(), d.GetMonth(), d.GetDay())

	loc := &latlng.LatLng{
		Latitude:  37.422,
		Longitude: -122.084,
	}
	fmt.Printf("Location: lat=%f, lng=%f\n", loc.GetLatitude(), loc.GetLongitude())

	data, err := proto.Marshal(d)
	if err != nil {
		panic(err)
	}

	var decoded date.Date
	if err := proto.Unmarshal(data, &decoded); err != nil {
		panic(err)
	}
	fmt.Printf("Decoded date: %04d-%02d-%02d\n", decoded.GetYear(), decoded.GetMonth(), decoded.GetDay())
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto@v0.0.0-20190306203927-b5d61aea6440"
  ]
}

package main

import (
	"fmt"
	"math"
	"os"

	"github.com/golang/protobuf/proto"
	"google.golang.org/genproto/googleapis/type/date"
	"google.golang.org/genproto/googleapis/type/latlng"
)

func main() {
	// Assertion 1: date.Date.GetYear, GetMonth, and GetDay return zero values on nil or uninitialized instances, and return set values on populated instances.
	{
		var nilDate *date.Date
		if nilDate.GetYear() != 0 || nilDate.GetMonth() != 0 || nilDate.GetDay() != 0 {
			fmt.Fprintf(os.Stderr, "assertion 1 failed: nil date getters must return 0\n")
			os.Exit(1)
		}

		emptyDate := &date.Date{}
		if emptyDate.GetYear() != 0 || emptyDate.GetMonth() != 0 || emptyDate.GetDay() != 0 {
			fmt.Fprintf(os.Stderr, "assertion 1 failed: empty date getters must return 0\n")
			os.Exit(1)
		}

		d := &date.Date{Year: 2026, Month: 9, Day: 18}
		if d.GetYear() != 2026 || d.GetMonth() != 9 || d.GetDay() != 18 {
			fmt.Fprintf(os.Stderr, "assertion 1 failed: populated date getters mismatch\n")
			os.Exit(1)
		}
	}

	// Assertion 2: latlng.LatLng.GetLatitude and GetLongitude return 0.0 on nil instances, and return configured coordinates on populated instances.
	{
		var nilLatLng *latlng.LatLng
		if nilLatLng.GetLatitude() != 0.0 || nilLatLng.GetLongitude() != 0.0 {
			fmt.Fprintf(os.Stderr, "assertion 2 failed: nil latlng getters must return 0.0\n")
			os.Exit(1)
		}

		emptyLatLng := &latlng.LatLng{}
		if emptyLatLng.GetLatitude() != 0.0 || emptyLatLng.GetLongitude() != 0.0 {
			fmt.Fprintf(os.Stderr, "assertion 2 failed: empty latlng getters must return 0.0\n")
			os.Exit(1)
		}

		pos := &latlng.LatLng{Latitude: 37.422, Longitude: -122.084}
		if math.Abs(pos.GetLatitude()-37.422) > 1e-6 || math.Abs(pos.GetLongitude()-(-122.084)) > 1e-6 {
			fmt.Fprintf(os.Stderr, "assertion 2 failed: populated latlng getters mismatch\n")
			os.Exit(1)
		}
	}

	// Assertion 3: date.Date serializes to protobuf bytes and unmarshals back preserving year, month, and day.
	{
		orig := &date.Date{Year: 2019, Month: 3, Day: 6}
		data, err := proto.Marshal(orig)
		if err != nil {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: marshal failed: %v\n", err)
			os.Exit(1)
		}
		if len(data) == 0 {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: marshal returned empty bytes\n")
			os.Exit(1)
		}

		var decoded date.Date
		if err := proto.Unmarshal(data, &decoded); err != nil {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: unmarshal failed: %v\n", err)
			os.Exit(1)
		}
		if decoded.GetYear() != 2019 || decoded.GetMonth() != 3 || decoded.GetDay() != 6 {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: unmarshaled values mismatch\n")
			os.Exit(1)
		}
	}

	// Assertion 4: latlng.LatLng serializes to protobuf bytes and unmarshals back preserving latitude and longitude coordinates.
	{
		orig := &latlng.LatLng{Latitude: -33.8688, Longitude: 151.2093}
		data, err := proto.Marshal(orig)
		if err != nil {
			fmt.Fprintf(os.Stderr, "assertion 4 failed: marshal failed: %v\n", err)
			os.Exit(1)
		}
		if len(data) == 0 {
			fmt.Fprintf(os.Stderr, "assertion 4 failed: marshal returned empty bytes\n")
			os.Exit(1)
		}

		var decoded latlng.LatLng
		if err := proto.Unmarshal(data, &decoded); err != nil {
			fmt.Fprintf(os.Stderr, "assertion 4 failed: unmarshal failed: %v\n", err)
			os.Exit(1)
		}
		if math.Abs(decoded.GetLatitude()-orig.Latitude) > 1e-6 || math.Abs(decoded.GetLongitude()-orig.Longitude) > 1e-6 {
			fmt.Fprintf(os.Stderr, "assertion 4 failed: unmarshaled coordinates mismatch\n")
			os.Exit(1)
		}
	}

	// Assertion 5: date.Date.Reset clears all fields restoring the instance to its zero state.
	{
		d := &date.Date{Year: 2024, Month: 12, Day: 25}
		d.Reset()
		if d.GetYear() != 0 || d.GetMonth() != 0 || d.GetDay() != 0 {
			fmt.Fprintf(os.Stderr, "assertion 5 failed: Reset did not clear date fields\n")
			os.Exit(1)
		}
	}

	// Assertion 6: latlng.LatLng.Reset clears latitude and longitude restoring the instance to its zero state.
	{
		pos := &latlng.LatLng{Latitude: 48.8566, Longitude: 2.3522}
		pos.Reset()
		if pos.GetLatitude() != 0.0 || pos.GetLongitude() != 0.0 {
			fmt.Fprintf(os.Stderr, "assertion 6 failed: Reset did not clear latlng fields\n")
			os.Exit(1)
		}
	}

	fmt.Println("All contract assertions passed.")
}