google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51

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@v0.0.0-20190911173649-1774047e7e51
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto@v0.0.0-20190911173649-1774047e7e51

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:sha256:05d17601a533b39524acffbd3ae8e24fe1740b9e366fde2d60ecdfb36b724e11","contract":["date.Date.GetYear, GetMonth, and GetDay return 0 on nil or zero-valued instances and return configured fields on populated instances.","latlng.LatLng.GetLatitude and GetLongitude return 0.0 on nil or zero-valued instances and return configured coordinates on populated instances.","date.Date marshals to protobuf wire format and unmarshals back preserving Year, Month, and Day.","latlng.LatLng marshals to protobuf wire format and unmarshals back preserving Latitude and Longitude.","(*date.Date).Reset and (*latlng.LatLng).Reset clear all fields back to their zero values."],"goal":"verify pkg:golang/google.golang.org/genproto@v0.0.0-20190911173649-1774047e7e51","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto@v0.0.0-20190911173649-1774047e7e51"],"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@v0.0.0-20190911173649-1774047e7e51"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto@v0.0.0-20190911173649-1774047e7e51","verifierAdapter":"golang@1"}

module example.com/verify

go 1.21

require (
	github.com/golang/protobuf v1.3.2
	google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51
)

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/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
github.com/golang/protobuf v1.3.2/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/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 v0.0.0-20190911173649-1774047e7e51 h1:Ex1mq5jaJof+kRnYi3SlYJ8KKa9Ao3NHyIT5XJ1gF6U=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
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:  2019,
		Month: 9,
		Day:   11,
	}
	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@v0.0.0-20190911173649-1774047e7e51",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto@v0.0.0-20190911173649-1774047e7e51"
  ]
}

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 0 on nil or zero-valued instances and return configured fields 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: 2019, Month: 9, Day: 11}
		if d.GetYear() != 2019 || d.GetMonth() != 9 || d.GetDay() != 11 {
			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 or zero-valued 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 marshals to protobuf wire format and unmarshals back preserving Year, Month, and Day.
	{
		orig := &date.Date{Year: 2019, Month: 9, Day: 11}
		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() != 9 || decoded.GetDay() != 11 {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: unmarshaled values mismatch\n")
			os.Exit(1)
		}
	}

	// Assertion 4: latlng.LatLng marshals to protobuf wire format and unmarshals back preserving Latitude and Longitude.
	{
		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 and (*latlng.LatLng).Reset clear all fields back to their zero values.
	{
		d := &date.Date{Year: 2019, Month: 9, Day: 11}
		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)
		}

		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 5 failed: Reset did not clear latlng fields\n")
			os.Exit(1)
		}
	}

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