Typing text (send_keys) in Selenium Python - Test Execution Trace

Test Overview

This test opens a web page, finds a text input box, types the text "Hello World" into it, and verifies that the input box contains the typed text.

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

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

    def test_typing_text(self):
        driver = self.driver
        wait = WebDriverWait(driver, 10)
        input_box = wait.until(EC.presence_of_element_located((By.ID, 'text-input')))
        input_box.clear()
        input_box.send_keys('Hello World')
        self.assertEqual(input_box.get_attribute('value'), 'Hello World')

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

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

Execution Trace - 7 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window is open, ready to load the page	—	PASS
2	Navigates to URL 'https://example.com/input'	Page with input box loaded and visible	—	PASS
3	Waits until element with ID 'text-input' is present	Input box is found on the page	Element with ID 'text-input' is present	PASS
4	Clears any existing text in the input box	Input box is empty	—	PASS
5	Types text 'Hello World' into the input box using send_keys	Input box shows text 'Hello World'	—	PASS
6	Checks that the input box value is exactly 'Hello World'	Input box value attribute equals 'Hello World'	Assert input_box.get_attribute('value') == 'Hello World'	PASS
7	Test ends and browser closes	Browser window closed	—	PASS

Failure Scenario

Failing Condition: The input box with ID 'text-input' is not found on the page

Execution Trace Quiz - 3 Questions

What does the test do after opening the browser and loading the page?

A It waits for the input box with ID 'text-input' to appear

B It immediately types text without waiting

C It closes the browser

D It refreshes the page

Key Result

Always wait explicitly for elements to be present before interacting with them to avoid timing issues in tests.

Practice

1. What does the send_keys method do in Selenium Python?

easy

A. It types text into input fields or other elements.

B. It clicks on buttons or links.

C. It retrieves the text from an element.

D. It waits for an element to be visible.

Solution

1. Step 1: Understand the purpose of send_keys

   The send_keys method simulates typing text into input fields or editable elements in Selenium.

2. Step 2: Differentiate from other actions

   Clicking, retrieving text, or waiting are done by other methods like click(), text property, or WebDriverWait.

3. Final Answer:

   It types text into input fields or other elements. -> Option A

4. Quick Check:

   send_keys = types text [OK]

Hint: send_keys means typing text into fields [OK]

Common Mistakes:

• Confusing send_keys with click()
• Thinking send_keys reads text
• Assuming send_keys waits for elements

2. Which of the following is the correct syntax to type the text "hello" into an input element stored in variable input_box?

easy

A. input_box.write("hello")

B. input_box.send_keys("hello")

C. input_box.enter("hello")

D. input_box.type("hello")

Solution

1. Step 1: Recall the method name for typing text

   In Selenium Python, the method to type text is send_keys().

2. Step 2: Check the syntax correctness

   The correct syntax is calling send_keys on the element with the text as a string argument.

3. Final Answer:

   input_box.send_keys("hello") -> Option B

4. Quick Check:

   Correct method is send_keys() [OK]

Hint: Use send_keys() to type text, not type() or enter() [OK]

Common Mistakes:

• Using non-existent methods like type() or enter()
• Forgetting parentheses after send_keys
• Passing non-string arguments

3. What will be the value of the input box after executing this code?

input_box = driver.find_element(By.ID, "username")
input_box.send_keys("user123")
print(input_box.get_attribute("value"))

medium

A. "" (empty string)

B. "input_box"

C. "user123"

D. Throws an error

Solution

1. Step 1: Understand send_keys effect on input value

   Calling send_keys("user123") types "user123" into the input box, setting its value attribute.

2. Step 2: Retrieve the value attribute

   get_attribute("value") returns the current text inside the input box, which is "user123".

3. Final Answer:

   "user123" -> Option C

4. Quick Check:

   send_keys sets value attribute = "user123" [OK]

Hint: send_keys sets input value; get_attribute('value') reads it [OK]

Common Mistakes:

• Expecting get_attribute to return element name
• Thinking send_keys clears input automatically
• Assuming print shows element object

4. You want to type "admin" into an input box but your test fails with an error. Which line fixes the error?

input_box = driver.find_element(By.ID, "user")
input_box.send_keys(admin)

medium

A. input_box.send_keys("admin")

B. input_box.send_keys('admin")

C. input_box.send_keys(admin)

D. input_box.send_keys()

Solution

1. Step 1: Identify the error cause

   The argument admin is not in quotes, so Python treats it as a variable, causing a NameError.

2. Step 2: Fix by passing a string literal

   Enclose "admin" in quotes to pass it as a string: send_keys("admin").

3. Final Answer:

   input_box.send_keys("admin") -> Option A

4. Quick Check:

   Text must be a string in quotes [OK]

Hint: Always put text in quotes inside send_keys() [OK]

Common Mistakes:

• Passing variable without quotes
• Leaving send_keys empty
• Using single quotes inconsistently (valid but watch syntax)

5. You want to type a password into a field but first clear any existing text. Which code snippet correctly does this?

hard

A. input_box.clear("mypassword")

B. input_box.send_keys("")
input_box.send_keys("mypassword")

C. input_box.send_keys("mypassword")
input_box.clear()

D. input_box.clear()
input_box.send_keys("mypassword")

Solution

1. Step 1: Clear existing text before typing

   Use clear() method to remove any existing text in the input box.

2. Step 2: Type the new password

   After clearing, call send_keys("mypassword") to type the password.

3. Final Answer:

   input_box.clear() input_box.send_keys("mypassword") -> Option D

4. Quick Check:

   Clear first, then send_keys [OK]

Hint: Clear input before typing new text with clear() [OK]

Common Mistakes:

• Typing before clearing causes leftover text
• Using clear() with arguments (invalid)
• Sending empty string to clear input