github.com/aws/aws-sdk-go-v2 v1.47.0: aws.NewConfig

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 github.com/aws/aws-sdk-go-v2/aws.NewConfig in pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0
Demonstrate these symbols/APIs:
  - github.com/aws/aws-sdk-go-v2/aws.NewConfig

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:a875182b75b1ea6bfc8b26e61c64043fabf69e90423504dffa4897972b41b147","contract":["aws.NewConfig returns a non-nil Config pointer with default values","aws.NewConfig produces a Config that preserves assigned Region, AppID, and RetryMode","aws.NewConfig produces a Config whose Copy produces an independent shallow copy","aws.NewConfig produces a Config that supports custom BaseEndpoint and AnonymousCredentials"],"goal":"verify github.com/aws/aws-sdk-go-v2/aws.NewConfig in pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0","kind":"HOW","packages":["pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0"],"schemaVersion":1,"symbols":["github.com/aws/aws-sdk-go-v2/aws.NewConfig"]},"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/github.com/aws/aws-sdk-go-v2@v1.47.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0","symbols":["github.com/aws/aws-sdk-go-v2/aws.NewConfig"],"verifierAdapter":"golang@1"}

module sample

go 1.26

require github.com/aws/aws-sdk-go-v2 v1.47.0

require github.com/aws/smithy-go v1.28.1 // indirect

github.com/aws/aws-sdk-go-v2 v1.47.0 h1:0jsHallhJCeaU0Ko48c/3FK1ctOQ7NpzggxriJOQ8MQ=
github.com/aws/aws-sdk-go-v2 v1.47.0/go.mod h1:bttEH6JqnUL8LepvDVfdrds/fZ5bCIxzpe3abyUrhDU=
github.com/aws/smithy-go v1.28.1 h1:R/nXH00c8qcfCzQVELtRw+eLQWtzv+VAIEFJ1/xxXlQ=
github.com/aws/smithy-go v1.28.1/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=

package main

import (
	"fmt"

	"github.com/aws/aws-sdk-go-v2/aws"
)

func main() {
	cfg := aws.NewConfig()
	cfg.Region = "us-east-1"
	cfg.RetryMaxAttempts = 3
	cfg.RetryMode = aws.RetryModeStandard

	fmt.Printf("Initialized AWS Config: Region=%s, MaxAttempts=%d, RetryMode=%v\n",
		cfg.Region, cfg.RetryMaxAttempts, cfg.RetryMode)
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/aws/aws-sdk-go-v2/aws.NewConfig in pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/aws/aws-sdk-go-v2@v1.47.0"
  ],
  "symbols": [
    "github.com/aws/aws-sdk-go-v2/aws.NewConfig"
  ]
}

package main

import (
	"context"
	"fmt"
	"os"

	"github.com/aws/aws-sdk-go-v2/aws"
)

func main() {
	if err := runContract(); err != nil {
		fmt.Fprintf(os.Stderr, "Contract test failure: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("PASS: all aws.NewConfig contract assertions passed")
}

func runContract() error {
	ctx := context.Background()

	// Assertion 1: aws.NewConfig returns a non-nil Config pointer with default values
	{
		cfg := aws.NewConfig()
		if cfg == nil {
			return fmt.Errorf("aws.NewConfig() returned nil pointer")
		}
		if cfg.Region != "" {
			return fmt.Errorf("expected empty Region, got %q", cfg.Region)
		}
		if cfg.RetryMaxAttempts != 0 {
			return fmt.Errorf("expected RetryMaxAttempts 0, got %d", cfg.RetryMaxAttempts)
		}
		if cfg.Credentials != nil {
			return fmt.Errorf("expected nil Credentials, got %v", cfg.Credentials)
		}
	}

	// Assertion 2: aws.NewConfig produces a Config that preserves assigned Region, AppID, and RetryMode
	{
		cfg := aws.NewConfig()
		cfg.Region = "us-west-2"
		cfg.AppID = "sample-app"
		cfg.RetryMaxAttempts = 4
		cfg.RetryMode = aws.RetryModeStandard

		if cfg.Region != "us-west-2" {
			return fmt.Errorf("expected Region 'us-west-2', got %q", cfg.Region)
		}
		if cfg.AppID != "sample-app" {
			return fmt.Errorf("expected AppID 'sample-app', got %q", cfg.AppID)
		}
		if cfg.RetryMaxAttempts != 4 {
			return fmt.Errorf("expected RetryMaxAttempts 4, got %d", cfg.RetryMaxAttempts)
		}
		if cfg.RetryMode != aws.RetryModeStandard {
			return fmt.Errorf("expected RetryMode %v, got %v", aws.RetryModeStandard, cfg.RetryMode)
		}
	}

	// Assertion 3: aws.NewConfig produces a Config whose Copy produces an independent shallow copy
	{
		cfg := aws.NewConfig()
		cfg.Region = "us-east-1"
		cfg.RetryMaxAttempts = 3

		cp := cfg.Copy()
		if cp.Region != "us-east-1" {
			return fmt.Errorf("expected copied Region 'us-east-1', got %q", cp.Region)
		}
		if cp.RetryMaxAttempts != 3 {
			return fmt.Errorf("expected copied RetryMaxAttempts 3, got %d", cp.RetryMaxAttempts)
		}

		cp.Region = "eu-west-1"
		if cfg.Region != "us-east-1" {
			return fmt.Errorf("expected original Region to remain 'us-east-1', got %q", cfg.Region)
		}
		if cp.Region != "eu-west-1" {
			return fmt.Errorf("expected copied Region 'eu-west-1', got %q", cp.Region)
		}
	}

	// Assertion 4: aws.NewConfig produces a Config that supports custom BaseEndpoint and AnonymousCredentials
	{
		endpoint := "http://localhost:4566"
		cfg := aws.NewConfig()
		cfg.BaseEndpoint = aws.String(endpoint)
		cfg.Credentials = aws.AnonymousCredentials{}

		if cfg.BaseEndpoint == nil || *cfg.BaseEndpoint != endpoint {
			return fmt.Errorf("expected BaseEndpoint %q, got %v", endpoint, cfg.BaseEndpoint)
		}

		creds, err := cfg.Credentials.Retrieve(ctx)
		if err == nil {
			return fmt.Errorf("expected error from AnonymousCredentials.Retrieve, got nil")
		}
		if creds.Source != "AnonymousCredentials" {
			return fmt.Errorf("expected creds.Source 'AnonymousCredentials', got %q", creds.Source)
		}
	}

	return nil
}