How should the "Date of Birth" field be tested?

Testing the "Date of Birth" field includes various aspects, from format validation to boundary value checks and interaction with other elements.

Functional Testing:

• Positive Scenarios:
  • Entering a correct date in a supported format (e.g., DD.MM.YYYY, MM/DD/YYYY).
  • Selecting a date using a calendar/date picker.
  • Entering a date that corresponds to the minimum allowable age (if such a requirement exists).
  • Entering a date that corresponds to the maximum allowable age (if such a requirement exists).
• Negative Scenarios:
  • Entering an incorrect date format.
  • Entering invalid values (e.g., February 31, March 32).
  • Entering letters, symbols, or special characters instead of numbers.
  • Leaving the field empty if it is mandatory.
  • Entering a future date (if not allowed).
  • Entering a date that violates age restrictions.
  • Copying and pasting invalid values.

Validation Testing:

• Checking the display of error messages when invalid data is entered.
• Verifying the correctness of error message texts.
• Ensuring the form does not submit when there are validation errors.
• Checking that error messages are cleared after entering correct data.

UI/UX Testing (if a date picker or calendar is used):

• Ease of selecting a date using the calendar.
• Correct display of the current month/year.
• Navigation through months and years.
• Highlighting the selected date.
• Accessibility for users with disabilities (if applicable).

Performance Testing:

• Loading and rendering speed of the field.
• Calendar/date picker responsiveness when selecting a date.

Security Testing:

• Checking for XSS (Cross-Site Scripting) by inputting scripts into the field.

Boundary Values:

• Testing birth year: the minimum possible year (e.g., 1900), current year minus minimum age, current year minus maximum age.
• Testing dates: first day of the month, last day of the month, January 1, December 31.
• Testing leap years.

Integration Testing:

• How the "Date of Birth" field interacts with other form fields (e.g., "Age", "Year of Issue").
• How the birth date affects application logic (e.g., age calculation, feature availability).

High-Level Test Case Examples:

• ID: TC_DOB_001 Description: Entering a valid date of birth in DD.MM.YYYY format. Steps: 1. Open the form. 2. Enter "01.01.1990" in the "Date of Birth" field. 3. Submit the form. Expected Result: The form is successfully submitted, and the date is saved correctly.

• ID: TC_DOB_002 Description: Entering an invalid date (February 31). Steps: 1. Open the form. 2. Enter "31.02.2000" in the "Date of Birth" field. 3. Leave the field. Expected Result: An validation error message appears: "Invalid date".

• ID: TC_DOB_003 Description: Selecting a date using the date picker. Steps: 1. Open the form. 2. Click on the date picker icon next to the "Date of Birth" field. 3. Choose an arbitrary date in the calendar. Expected Result: The selected date appears in the "Date of Birth" field.

Example of an Automated Test (Selenium with 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

# def test_valid_date_of_birth():
#     driver = webdriver.Chrome() # or another browser
#     driver.get("your_form_url") # replace with your form URL

#     try:
#         date_field = WebDriverWait(driver, 10).until(
#             EC.presence_of_element_located((By.ID, "dateOfBirthFieldId")) # replace with actual ID
#         )
#         date_field.send_keys("01.01.1990")

#         # Additional actions like clicking submit
#         # For example: submit_button = driver.find_element(By.ID, "submitButtonId")
#         # submit_button.click()

#         # Further checks, e.g., success message or redirect
#         # assert "Success" in driver.page_source

#     finally:
#         driver.quit()

Note that this is a basic example. Actual tests will be more complex and include more checks.