Selenium Python Tutorial 4 | selenium python drop down list | Python WebDriver

This is the fourth tutorial in the Selenium Python Tutorials for Beginners. This Selenium Python beginner tutorial explains how to work with a DropDown using Selenium WebDriver. First, view the Selenium Python Drop Down List tutorial. Then read on.

 A dropdown is a web element that you can click to open a number of values. You may select any value from the options. Here is the test case to test the Journey Planner application.

Test step	Expected result
Navigate to the Journey Planner application.
Enter a distance, speed and time to travel.
Click the Calculate Results button.	The result in days should appear.
Repeat the previous two test steps for each option in the DropDown box.

Here is my Selenium Python example that tests each option in the Selenium Python drop down list. I have put explanations in the comments within the code (lines or phrases starting with #).

# Selenium WebDriver Python coding
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait as W
from selenium.webdriver.support import expected_conditions as E
# The Select library operates the drop down list.

from selenium.webdriver.support.ui import Select
import time

exec_path = r"E:\Training\SeleniumPython\Downloads\geckodriver-v0.26.0-win32\geckodriver.exe"
URL = "https://inderpsingh.blogspot.com/2014/08/demowebapp_24.html"
distance_id_locator = "distance"
distance = 0 # Assign some initial value to distance.
speed_id_locator = "speed"
speed = 45 # Assign some initial value to speed.
time_id_locator = "hours"
calculate_css_locator = ".post-body > div:nth-child(1) > div:nth-child(1) > form:nth-child(1) > button:nth-child(20)"
result_id_locator = "result"
wait_time_out = 5

# Define the Python WebDriver
driver = webdriver.Firefox(executable_path=exec_path)
driver.get(URL)
wait_variable = W(driver, wait_time_out)
# JavaScript to scroll window down by 240 pixels
driver.execute_script("window.scrollBy(0,240)", "")
# Find web elements using WebDriverWait Python.
distance_element = wait_variable.until(E.presence_of_element_located((By.ID, distance_id_locator)))
speed_element = wait_variable.until(E.presence_of_element_located((By.ID, speed_id_locator)))
# Time_element is a drop down list. Call the Select method on Explicit Wait.
time_element = Select(wait_variable.until(E.presence_of_element_located((By.ID, time_id_locator))))
calculate_element = wait_variable.until(E.presence_of_element_located((By.CSS_SELECTOR, calculate_css_locator)))
result_element = wait_variable.until(E.presence_of_element_located((By.ID, result_id_locator)))
# time_element.options is the list of all the options in the dropdown list.
for option in time_element.options:
    distance_element.clear()
    distance += 100 # Generate distance test data by adding 100 to it's previous value.
    distance_element.send_keys(distance)
    speed_element.clear()
    speed += 1 # Generate speed test data by adding 1 to it's previous value.
    speed_element.send_keys(speed)
    time_element.select_by_visible_text(option.text) # Select the dropdown option.
    calculate_element.click()
    time.sleep(1)
    # Calculate the expected result using my own calculation.
    expected_result = round(float(distance)/float(speed)/float(option.get_attribute("value")),4)
    if expected_result == int(expected_result): expected_result = int(expected_result)
    # Validate by comparing expected result with the actual result from the application.
    if str(expected_result) in result_element.text:
        print ("Passed", str(expected_result), result_element.text)
    else:
        print ("Failed", str(expected_result), result_element.text)

Want to learn more e.g. how to find the web element locators and see the above code working? Please view my Selenium Python Drop Down List tutorial. Thank you.