File upload handling in Selenium Python - Test Execution Trace

Test Overview

This test automates uploading a file on a web page and verifies that the file upload was successful by checking the displayed file name.

Test Code - Selenium

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import unittest
import os

class TestFileUpload(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get('https://example.com/upload')

    def test_file_upload(self):
        driver = self.driver
        # Locate the file input element by its id
        file_input = WebDriverWait(driver, 10).until(
            EC.presence_of_element_located((By.ID, 'file-upload'))
        )
        # Prepare the file path to upload
        file_path = os.path.abspath('testfile.txt')
        # Send the file path to the input element
        file_input.send_keys(file_path)
        # Click the upload button
        upload_button = driver.find_element(By.ID, 'upload-button')
        upload_button.click()
        # Wait for the uploaded file name to appear
        uploaded_file_name = WebDriverWait(driver, 10).until(
            EC.visibility_of_element_located((By.ID, 'uploaded-file-name'))
        )
        # Assert the uploaded file name matches the file uploaded
        self.assertEqual(uploaded_file_name.text, 'testfile.txt')

    def tearDown(self):
        self.driver.quit()

if __name__ == '__main__':
    unittest.main()

Execution Trace - 6 Steps

Step	Action	System State	Assertion	Result
1	Test starts and opens Chrome browser	Browser window opens at URL https://example.com/upload	-	PASS
2	Waits for file input element with id 'file-upload' to be present	File input element is visible on the page	Presence of file input element	PASS
3	Sends absolute file path of 'testfile.txt' to file input element	File path is entered into the file input field	-	PASS
4	Finds and clicks the upload button with id 'upload-button'	Upload button is clicked, upload process starts	-	PASS
5	Waits for uploaded file name element with id 'uploaded-file-name' to be visible	Uploaded file name 'testfile.txt' is displayed on the page	Uploaded file name text equals 'testfile.txt'	PASS
6	Test ends and browser closes	Browser window closes	-	PASS

Failure Scenario

Failing Condition: File input element with id 'file-upload' is not found or file path is incorrect

Execution Trace Quiz - 3 Questions

What does the test verify after uploading the file?

A The displayed uploaded file name matches the uploaded file

B The upload button is disabled after clicking

C The file input field is cleared after upload

D The page URL changes after upload

Key Result

Always wait explicitly for elements to be present or visible before interacting to avoid flaky tests.