Playwright Testing for File Management and Cloud Storage Integration

Test file upload to AWS S3 and Google Cloud Storage, folder navigation, file preview generation, and bulk download operations. This guide provides step-by-step Playwright patterns to handle this scenario reliably.

Introduction

Robust automation requires handling domain-specific patterns effectively. This article covers playwright testing for file management and cloud storage integration with production-ready Playwright code.

Architecture Overview

graph TD
    UI["File Upload UI"] --> Presign["Get Presigned URL"]
    Presign --> S3["Upload to S3"]
    S3 --> Confirm["Upload Complete"]
    Confirm --> List["File Appears in List"]

Implementation Guide

test('file uploads to cloud storage successfully', async ({ page }) => {
  // Mock S3 presigned URL generation
  await page.route('**/api/upload/presign', route =>
    route.fulfill({ json: { uploadUrl: 'https://s3.amazonaws.com/mock-upload', fileKey: 'test/file.pdf' } })
  );
  // Mock S3 PUT
  await page.route('https://s3.amazonaws.com/mock-upload', route =>
    route.fulfill({ status: 200 })
  );

  await page.goto('/files');
  await page.getByTestId('file-input').setInputFiles('test-fixtures/sample.pdf');
  await page.getByRole('button', { name: 'Upload' }).click();
  await expect(page.getByText('sample.pdf uploaded')).toBeVisible();
});

Run Your Tests

npx playwright test --grep "Playwright Testing for"
npx playwright test --ui

Reference Table

Best Practices

Common Mistakes

Frequently Asked Questions

How to test file upload with presigned S3 URLs?

Mock both the presign endpoint and the S3 PUT URL to test the complete two-step upload flow.

How to test file size validation?

Attempt to upload a file that exceeds the limit and verify the client-side error message appears before uploading.

Can Playwright test folder creation and navigation?

Yes, click create folder, type a name, and navigate into it to verify the folder structure works.

How to test bulk file operations?

Select multiple files with checkboxes and trigger bulk download or delete, then verify the batch operation result.

How to test file type restriction?

Try to select a disallowed file type and verify the input rejects it or shows a validation error.

Summary

Test file upload to AWS S3 and Google Cloud Storage, folder navigation, file preview generation, and bulk download operations. Apply these patterns to build a reliable, maintainable automation suite for your specific use case.

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