google.golang.org/api v0.273.1: googleapi.CheckResponse

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 google.golang.org/api/googleapi.CheckResponse in pkg:golang/google.golang.org/api@v0.273.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/api@v0.273.1
Demonstrate these symbols/APIs:
  - google.golang.org/api/googleapi.CheckResponse

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 (
	"net/http"

	"google.golang.org/api/googleapi"
)

func ValidateResponse(res *http.Response) error {
	return googleapi.CheckResponse(res)
}

{"case":{"caseId":"case:sha256:1d98f673962c6fab9d5918b589c201df5f2164377fe65c94c5823d7fd358a059","contract":["googleapi.CheckResponse returns nil for HTTP responses with 2xx status codes such as 200 OK","googleapi.CheckResponse parses structured JSON error responses with non-2xx status codes into a *googleapi.Error containing Code, Message, and Errors","googleapi.CheckResponse captures plain-text non-2xx HTTP response bodies in the Body field of the returned *googleapi.Error"],"goal":"verify google.golang.org/api/googleapi.CheckResponse in pkg:golang/google.golang.org/api@v0.273.1","kind":"HOW","packages":["pkg:golang/google.golang.org/api@v0.273.1"],"schemaVersion":1,"symbols":["google.golang.org/api/googleapi.CheckResponse"]},"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/api@v0.273.1"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/api@v0.273.1","symbols":["google.golang.org/api/googleapi.CheckResponse"],"verifierAdapter":"golang@1"}

module sample

go 1.25.0

require google.golang.org/api v0.273.1

google.golang.org/api v0.273.1 h1:L7G/TmpAMz0nKx/ciAVssVmWQiOF6+pOuXeKrWVsquY=
google.golang.org/api v0.273.1/go.mod h1:JbAt7mF+XVmWu6xNP8/+CTiGH30ofmCmk9nM8d8fHew=

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/api/googleapi.CheckResponse in pkg:golang/google.golang.org/api@v0.273.1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/api@v0.273.1"
  ],
  "symbols": [
    "google.golang.org/api/googleapi.CheckResponse"
  ]
}

package main

import (
	"errors"
	"fmt"
	"io"
	"net/http"
	"os"
	"strings"

	"sample"

	"google.golang.org/api/googleapi"
)

func main() {
	okResp := &http.Response{
		StatusCode: http.StatusOK,
		Header:     http.Header{"Content-Type": []string{"application/json"}},
		Body:       io.NopCloser(strings.NewReader(`{"status":"ok"}`)),
	}
	if err := sample.ValidateResponse(okResp); err != nil {
		fmt.Fprintf(os.Stderr, "expected nil error for 200 OK, got: %v\n", err)
		os.Exit(1)
	}

	jsonBody := `{"error":{"code":404,"message":"item not found","errors":[{"message":"item not found","reason":"notFound"}]}}`
	errResp := &http.Response{
		StatusCode: http.StatusNotFound,
		Header:     http.Header{"Content-Type": []string{"application/json"}},
		Body:       io.NopCloser(strings.NewReader(jsonBody)),
	}
	err := googleapi.CheckResponse(errResp)
	if err == nil {
		fmt.Fprintln(os.Stderr, "expected non-nil error for 404 response")
		os.Exit(1)
	}
	var gerr *googleapi.Error
	if !errors.As(err, &gerr) {
		fmt.Fprintf(os.Stderr, "expected *googleapi.Error, got %T: %v\n", err, err)
		os.Exit(1)
	}
	if gerr.Code != http.StatusNotFound || gerr.Message != "item not found" || len(gerr.Errors) != 1 || gerr.Errors[0].Reason != "notFound" {
		fmt.Fprintf(os.Stderr, "unexpected googleapi.Error fields: %+v\n", gerr)
		os.Exit(1)
	}

	plainResp := &http.Response{
		StatusCode: http.StatusInternalServerError,
		Header:     http.Header{"Content-Type": []string{"text/plain"}},
		Body:       io.NopCloser(strings.NewReader("backend error")),
	}
	err2 := googleapi.CheckResponse(plainResp)
	var gerr2 *googleapi.Error
	if !errors.As(err2, &gerr2) || gerr2.Code != http.StatusInternalServerError || gerr2.Body != "backend error" {
		fmt.Fprintf(os.Stderr, "unexpected plain error response result: %+v\n", err2)
		os.Exit(1)
	}
}