Test File Upload | What it is & How to Perform?

Test File Upload

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In the dynamic landscape of software development, ensuring robust functionality has become paramount. One critical aspect often overlooked is the seamless handling of file uploads. Whether it’s an e-commerce platform processing product images or a cloud-based service managing user documents, the ability to securely and efficiently handle file uploads is crucial.

This blog will help you understand why file upload testing is important and how test automation can make this testing quick and efficient. Let’s dive in.

What is Test File Upload?​

Test File Upload in software testing refers to verifying the functionality of file upload features in a software application. This testing is typically performed by testers or developers (in the case of unit testing).

The QA testers must test the file upload functionality to ensure that users can successfully upload files (such as documents, images, videos, etc.) to the application and that the uploaded files are processed correctly.

Some examples of applications where we upload files include Amazon, Google Drive, and LinkedIn.

Test File Upload

Why do we need to Test File Upload Functionality?

File upload testing helps ensure that the file upload feature of an application works as intended, allowing users to submit files and ensuring that those files are handled properly. 

This testing is crucial in applications that allow users to upload files, such as document sharing platforms, content management systems, and e-commerce applications.

Let me explain it in simple terms with an example scenario.

Example Scenario

Picture this: you’re using your favorite app or website, and you want to upload a file – perhaps a photo, a document, or even a video. It seems simple, right? Well, not quite.

Behind the scenes, a whole dance of processes is happening. The application needs to ensure that the file you’re uploading is the right type and size and that it won’t cause any hiccups in the system. It’s like the digital version of making sure your suitcase fits in the overhead compartment! 😜

Prerequisites of Test File Upload

When conducting file upload testing, make sure to have certain prerequisites in place to ensure thorough and effective testing. Here are some of the key prerequisites for testing file uploads:

  • Create a dedicated testing environment that closely mimics the production environment.
  • Prepare a set of test files with varying sizes, formats, and types. These files should cover a range of scenarios, including small and large files, different file types (For example, images and documents), and potential edge cases.
  • Understand and document the maximum file size that the application supports for uploads. This information is crucial for testing scenarios involving files of different sizes.
  • Select a test automation platform to automate file upload testing to eliminate manual errors and reduce testing time.

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  • Determine which file types the application allows for upload. Some applications may restrict certain file formats (For example, .exe files) due to security concerns.
  • Test under various network conditions to simulate real-world scenarios. This may include testing on different types of connections (For example, high-speed, 3G, and slow networks) to assess how the application handles uploads under different circumstances.

By ensuring these prerequisites are met, testers can conduct comprehensive and effective file upload testing, which helps identify and address any issues related to this critical functionality in an application.

How To Test a File Upload Functionality – Manually And Automation?

You can test file upload both manually and using automation. Let’s discuss both ways to understand the pros and cons of each method. That way, you can easily identify the best way to test file uploads.

Manual Testing

The simplest way to do file upload testing is using the manual approach. 

  1. Open the web page in the browser where you want to test file upload.
  2. Write test cases for every scenario and prepare test data for those tests.
  3. Execute each test case you have created and mark your observations in a sheet.
  4. To make sure we have tested different file formats, upload and test different files with different formats (For example, PNG, PDF, JPG, Docx, MP4, etc.)
  5. Verify that only the correct extensions pass the test cases. To do so, you should perform both positive and negative testing. That is, you need to use both valid and invalid data for testing. 

Let’s take LinkedIn as an example. A professional networking platform that we all use in our day-to-day lives. 

LinkedIn as an example for Testing File Upload

Most of us would have opted for LinkedIn jobs while looking for new opportunities. LinkedIn’s Easy Apply permits users to upload their resume only in a few formats (PDF, DOC, DOCX). That is, when you try uploading other formats, LinkedIn will not permit that action. To verify this functionality works correctly, testers have to perform file upload testing using various and invalid inputs as follows,

  • Valid data – PDF, DOC, DOCX 
  • Invalid data – JPG, PNG, XLS, etc.

This manual testing approach might look very simple in the beginning, but the number of test cases can increase up to 100 or more when you expand the test scenarios. In the long run, this will increase the project budget and buggy software, as repetitive manual testing can be error-prone. Alternatively, automated testing is the best option to solve this issue.

Automated File Upload Testing With Testsigma

I will explain how to automate this using Testsigma. With Testsigma, you don’t have to use coding or rewrite test cases every time something changes in the code. You can manage test cases efficiently with Testsigma. 

To automate file upload testing with Testsigma, follow these steps,

Step 1: Once you log in to the application, create a new project or use an existing project.

Automated file upload testing

Step 2: Now start creating test steps using appropriate NLPs. Here, I use an example website where we can test upload files.

Testsigma for automated testing

Step 3: To test the upload file, use the Upload NLP and upload files by selecting upload test data type from the drop-down. You can also use the Record option to record steps from the web app and automate them as tests.

File Upload Testing using Testsigma

Alternatively, you can go to Test Data – Upload and upload files there prior to creating test cases. Once done, when you use the Upload NLP, the application will let you select the files uploaded in the test data.

Look at the video below to understand how you can upload files to the cloud platform for testing.

Automated file upload testing

Step 4: Create other test cases as well. Click on Run to execute the test cases.

Step 5: Once the test is complete, you can analyze the test results in detail.

Testing Upload File

You can test file uploads for web, mobile, and desktop apps. Testsigma’s image injection allows you to scan and test QR codes. Explore more of our features here.

Automate your tests for Web, Mobile, Desktop And APIs on Cloud with Testsigma. No setup time needed.

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Still confused about the best approach to use? Automated web testing is the best way to test the entire functionality of your web application than manual testing. Automation offers several advantages over manual testing, like less time, cost, and resources. The test results are more reliable

Testsigma makes your testing process 10x faster, allowing you to ship products 10x faster. Not just file upload testing, Testsigma makes your entire functional testing faster and more efficient with this low-code automation. It is a robust, cloud-based, AI-driven test automation platform to automate web, mobile, desktop, and API testing in one place. 

Testsigma offers two pricing plans – Pro and Enterprise. You can explore all the advanced features of Testsigma and start automating your testing in less than 2 minutes. Try Testsigma Today!

Test Cases For File Upload

File Upload Test Cases

The following are some of the file upload test cases,

  • Verify that the upload file button or link is available on the application.
  • Verify that the file upload button or link is clickable.
  • Verify that the entire button, including the button text, is clickable.
  • Verify that the button text for file upload is correct or not.
  • Verify that the icon added next to the upload file aligns with the design or not.
  • Verify that upon clicking the Upload button, a window opens for selecting a file.
  • Verify that the cancel button is working correctly. That is, clicking on the close button should close the window.
  • Verify that users can select and upload multiple files if necessary.
  • Verify that users can upload multiple files simultaneously.
  • Verify that the order of uploaded files remains consistent.
  • Validate that users can only upload allowed file types (For example, document file types like doc, docx, pdf, or image file types like jpg, png).
  • Verify that an appropriate error message appears if an unsupported file type is uploaded.
  • Verify that an error message displays if the user attempts to upload more files than the limit allows.
  • Verify that the loader (loading graphics) appears while a file is uploading.
  • Verify that a password prompt appears when attempting to upload a locked file.
  • Verify that the file uploads successfully when a correct password is provided.
  • Verify that an error message displays for an incorrect password on a protected or locked file.
  • Verify that the uploaded file name appears correctly after the upload is complete.
  • Verify that the file extension is shown along with the file name.
  • Verify that the file size is displayed below the file name.
  • Verify that an error message appears if the file size exceeds the allowed limit.
  • Verify that an error message appears for an empty file with no content.
  • Verify the application’s behavior when uploading a file with an exceptionally long name.
  • Verify that … (3 dots) appear when the file name is too long and impacts the design.
  • Verify that the upload functionality is working correctly by uploading a file.
  • Verify that drag and drop functionality functions correctly for allowed file types.
  • Verify that dropping a file does not open it in the browser.
  • Verify that dropping a file does not trigger an automatic download.

The above upload file test cases will test the functionality of the file upload option in any application.

Importance of File Upload in Web Testing

File upload testing is crucial in web testing because it helps ensure a high-quality web application that delivers a pleasant user experience.

It guarantees both the safety of user data and the application’s overall integrity. Here are five key reasons why testing file uploads is vital in web testing,

  • Data Integrity,
  • Security,
  • User-Friendliness,
  • Regulatory Compliance,
  • Integration.


Testing file uploads is a critical part of ensuring the functionality and reliability of web, mobile, and desktop applications. The process may seem straightforward, but it involves a range of considerations, from file size and format restrictions to security and performance aspects.

With Testsigma, you can automate file upload tests with a diverse set of test data that includes files of varying sizes and formats, thus ensuring the application stands resilient.

Frequently Asked Questions

How do you test uploading files using Selenium?

You can test the file upload in Selenium by writing test scripts in different programming languages like Java, Python, C#, .NET, Ruby, PHP, and Javascript. Here, I will write a code script in Java that will help you test uploading files using Selenium,

<styled-code>package dev.selenium.elements;
import org.junit.jupiter.api.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.time.Duration;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
public class FileUploadTest {
    public void fileUploadTest() {
    WebDriver driver = new ChromeDriver();
    Path path = Paths.get("src/test/resources/selenium-snapshot.png");
    File imagePath = new File(path.toUri());
    //we want to import selenium-snapshot file.
   if(driver.getPageSource().contains("File Uploaded!")) {
	System.out.println("file uploaded");
        System.out.println("file not uploaded");

On the contrary, you can quickly test the upload file using low-code test automation platforms like Testsigma, so you can avoid the hassle of writing test scripts or downloading different applications to execute tests like Eclipse IDE, TestNG, or other frameworks.


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