INTRODUCTION – Testing in Python

PRACTICE QUIZ: SIMPLE TESTS

1. You can verify that software code behaves correctly using test ___.

2. What is the most basic way of testing a script?

3. When a test is codified into its own software, what kind of test is it?

4. Using _____ simplifies the testing process, allowing us to verify the program’s behavior repeatedly with many possible values.

5. The more complex our code becomes, the more value the use of _____ provides in managing errors.

6. When you test software, what are you really looking for?

7. The advantage of running automated tests is that they will always get the same expected ___ if the software code is good.

PRACTICE QUIZ: OTHER TEST CONCEPTS

1. In what type of test is the code not transparent?

2. Verifying an automation script works well with the overall system and external entities describes what type of test?

3. _____ ensures that any success or failure of a unit test is caused by the behavior of the unit in question, and doesn’t result from some external factor.

4. A test that is written after a bug has been identified in order to ensure the bug doesn’t show up again later is called _____

5. What type of software testing is used to verify the software’s ability to behave well under significantly stressed testing conditions?

6. An important characteristic of a unit test is ___.

7. What module can you load to use a bunch of testing methods for your unit tests?

8. Which of the following is NOT an advantage of running an automatic unit test in a suite for a single function?

9. Which of the following is descriptive of a black-box test case?

10. Running a piece of software code as-is to see if it runs describes what type of testing?

11. Which of the following is NOT an advantage of test-driven development (TDD)?

IMPLEMENT UNIT TESTING

1. What is the cause of an IndexError?

2. The function find_emails(argv) searches a dictionary using the employee’s first and last name, and then returns the matching email address. How does the script accept the input of the employee’s name? 

3. When you began working with the existing emails.py script, what mode did you need to open it in? 

4. Which of the following statements accurately describes how try/except blocks work? Select all that apply.

5. When referring to unit testing, what is a “test runner”?

6. The following code will either return an email address for an employee or an error message if there is no employee matching the name entered. What would the error message be?

if email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
else:
    return "No email"

7. The following import statement allows a Python file to access the script from another Python file. What exactly will this statement cause to be imported? 

from emails import find_email

8. When a try block is not able to execute a function, which of the following return examples will an exception block most likely NOT return?

9. What keyword can help provide a reason an error has occurred in a function?

10. When using the assertRaises method, what is passed first?

11. Which command did you use to view the contents of the user_emails.csv file? 

12. If a try clause is executed and an exception occurs, but there is no match for the exception in any of the except clauses, what happens?

13. Before software can ship, you have been asked to test the software. What specifically should you be testing for? 

14. When searching for an employee, the method email_dict.get(username) should return a valid email address unless the searched employee doesn’t exist. To return a message like, “No email address found” for a non-existent employee, what type of loop will do the job? 

15. What is the following code an example of?

if email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
else:
    return "No email address found"

16. When testing a working script with a known bug, what should be the overall order of your approach? 

17. The following portion of code will return an error message if a user fails to enter the full name of the employee for a search. What will the error message be?

def find_email(argv):
 """ Return an email address based on the username given."""
 # Create the username based on the command line input.
 try:
   fullname = str(argv[1] + " " + argv[2])
   # Preprocess the data
   email_dict = populate_dictionary('/home/<username>/data/user_emails.csv')
   # Find and print the email
   return email_dict.get(fullname.lower())
 except IndexError:
   return "Missing name"

18. When writing a try/except clause, how many except clauses can be included? 

19. When you looked for the script emails.py in the scripts directory, what command did you use to navigate to the scripts directory? 

20. There are plenty of practical reasons for writing a test case for a script. From a developer’s perspective, what is a good reason to write test cases for your scripts? 

21. When testing a working script with a known bug, what is the first step in the testing process? 

22. In the Implementing Unit Testing lab, you navigated to a data directory and a scripts directory. What did the commands to navigate to these directories begin with?

23. Your first test case was for missing parameters. What methods could you use to solve this issue? Select all that apply.

24. What is the purpose of software testing? 

25. Why is it important to perform regression testing?

26. Which of the following code blocks is an if-else loop which will return a valid email address or inform a user “No email address found”?

if email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
then:
    return "No email address found"

if email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
else:
    return "Invalid search"

if email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
else:
    return "No email address found" (CORRECT)

when email_dict.get(fullname.lower()):
    return email_dict.get(fullname.lower())
else:
    return "No email address found"

27. In the lab, you imported the unittest package, which you used to write test cases that correct bugs in the emails.py script. Which of the following does the unittest package support? 

CONCLUSION – Testing in Python