google.golang.org/api v0.287.1: bundler.ErrOversizedItem

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/support/bundler.ErrOversizedItem in pkg:golang/google.golang.org/api@v0.287.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/api@v0.287.1
Demonstrate these symbols/APIs:
  - google.golang.org/api/support/bundler.ErrOversizedItem

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:sha256:50edee19e9c373975fa37f27de7ea0f814abc03bea005fc741bd202710f9b05a","contract":["bundler.ErrOversizedItem is returned by Add when an item size exceeds BundleByteLimit","bundler.ErrOversizedItem is returned by AddWait when an item size exceeds BundleByteLimit","bundler.ErrOversizedItem has the expected error message 'item size exceeds bundle byte limit'","Bundler accepts items when item size is within BundleByteLimit or BundleByteLimit is unlimited"],"goal":"verify google.golang.org/api/support/bundler.ErrOversizedItem in pkg:golang/google.golang.org/api@v0.287.1","kind":"HOW","packages":["pkg:golang/google.golang.org/api@v0.287.1"],"schemaVersion":1,"symbols":["google.golang.org/api/support/bundler.ErrOversizedItem"]},"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@v0.287.1"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/api@v0.287.1","symbols":["google.golang.org/api/support/bundler.ErrOversizedItem"],"verifierAdapter":"golang@1"}

module example.com/bundler-sample

go 1.26.6

require google.golang.org/api v0.287.1

require golang.org/x/sync v0.21.0 // indirect

golang.org/x/sync v0.21.0 h1:HLII4xRRTtCRkxYp4HNFF0Js/Og6q2i++KXbg0gHCwM=
golang.org/x/sync v0.21.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
google.golang.org/api v0.287.1 h1:LiyJx32VU3cwQfLchn/513qKhc25hq0pEANYJoWNnnI=
google.golang.org/api v0.287.1/go.mod h1:lM2kYRzYUCBY91P9h6VF1PYmvhxii3O5hji37qRvIcY=

package main

import (
	"context"
	"errors"
	"fmt"

	"google.golang.org/api/support/bundler"
)

func main() {
	// Initialize a Bundler configured with a byte limit per bundle.
	b := bundler.NewBundler(string(""), func(items interface{}) {
		slice := items.([]string)
		fmt.Printf("Handled bundle with %d item(s)\n", len(slice))
	})
	b.BundleByteLimit = 20

	// Adding an item smaller than BundleByteLimit succeeds.
	if err := b.Add("hello", 5); err != nil {
		fmt.Printf("Unexpected error adding item: %v\n", err)
	}

	// Adding an item exceeding BundleByteLimit fails immediately with ErrOversizedItem.
	err := b.Add("item that is too large for the bundle", 35)
	if errors.Is(err, bundler.ErrOversizedItem) {
		fmt.Printf("Add returned expected ErrOversizedItem: %v\n", err)
	}

	// AddWait also fails with ErrOversizedItem when item size exceeds BundleByteLimit.
	bWait := bundler.NewBundler(string(""), func(interface{}) {})
	bWait.BundleByteLimit = 15
	errWait := bWait.AddWait(context.Background(), "oversized payload", 30)
	if errors.Is(errWait, bundler.ErrOversizedItem) {
		fmt.Printf("AddWait returned expected ErrOversizedItem: %v\n", errWait)
	}
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/api/support/bundler.ErrOversizedItem in pkg:golang/google.golang.org/api@v0.287.1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/api@v0.287.1"
  ],
  "symbols": [
    "google.golang.org/api/support/bundler.ErrOversizedItem"
  ]
}

package main

import (
	"context"
	"errors"
	"fmt"
	"os"

	"google.golang.org/api/support/bundler"
)

func main() {
	// Assertion 1: bundler.ErrOversizedItem is returned by Add when an item size exceeds BundleByteLimit
	{
		b := bundler.NewBundler(int(0), func(interface{}) {})
		b.BundleByteLimit = 100
		err := b.Add(1, 101)
		if err == nil {
			fmt.Fprintf(os.Stderr, "Assertion 1 failed: expected ErrOversizedItem, got nil\n")
			os.Exit(1)
		}
		if !errors.Is(err, bundler.ErrOversizedItem) && err != bundler.ErrOversizedItem {
			fmt.Fprintf(os.Stderr, "Assertion 1 failed: expected ErrOversizedItem, got %v\n", err)
			os.Exit(1)
		}
	}

	// Assertion 2: bundler.ErrOversizedItem is returned by AddWait when an item size exceeds BundleByteLimit
	{
		b := bundler.NewBundler(string(""), func(interface{}) {})
		b.BundleByteLimit = 50
		err := b.AddWait(context.Background(), "oversized", 51)
		if err == nil {
			fmt.Fprintf(os.Stderr, "Assertion 2 failed: expected ErrOversizedItem, got nil\n")
			os.Exit(1)
		}
		if !errors.Is(err, bundler.ErrOversizedItem) && err != bundler.ErrOversizedItem {
			fmt.Fprintf(os.Stderr, "Assertion 2 failed: expected ErrOversizedItem, got %v\n", err)
			os.Exit(1)
		}
	}

	// Assertion 3: bundler.ErrOversizedItem has the expected error message 'item size exceeds bundle byte limit'
	{
		expectedMsg := "item size exceeds bundle byte limit"
		if bundler.ErrOversizedItem == nil {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: ErrOversizedItem is nil\n")
			os.Exit(1)
		}
		if msg := bundler.ErrOversizedItem.Error(); msg != expectedMsg {
			fmt.Fprintf(os.Stderr, "Assertion 3 failed: expected %q, got %q\n", expectedMsg, msg)
			os.Exit(1)
		}
	}

	// Assertion 4: Bundler accepts items when item size is within BundleByteLimit or BundleByteLimit is unlimited
	{
		// With positive limit: items within limit succeed
		b := bundler.NewBundler(int(0), func(interface{}) {})
		b.BundleByteLimit = 100
		if err := b.Add(10, 100); err != nil {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: expected nil error for size == limit, got %v\n", err)
			os.Exit(1)
		}
		if err := b.Add(20, 1); err != nil {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: expected nil error for size < limit, got %v\n", err)
			os.Exit(1)
		}

		// With zero limit (unlimited): oversized sizes do not trigger ErrOversizedItem
		bUnlimited := bundler.NewBundler(int(0), func(interface{}) {})
		bUnlimited.BundleByteLimit = 0
		if err := bUnlimited.Add(30, 500000); err != nil {
			fmt.Fprintf(os.Stderr, "Assertion 4 failed: expected nil error with unlimited BundleByteLimit, got %v\n", err)
			os.Exit(1)
		}
	}

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