Testing INTRODUCTION

SELF REVIEW: WRITING A UNIT TEST

1. Did you complete the Writing a Unit Test exercise?

2. Were there any parts of Writing a Unit Test exercise that you found difficult to complete?

3. Would you say that you are able to explain, in your own words, what are unit tests?

KNOWLEDGE CHECK: INTRODUCTION TO TESTING

1. What is the correct way to export the  timesTwo  function as a module so that Jest can use it in testing files?

2. Testing is a way to verify the expectations you have regarding the behavior of your code.

3. Node.js can be used to build multiple types of applications. Select all that apply.

4. When the following test executes, what will the test result be?

    function add(a, b) {
        return a + b;
    }

    expect(add(10, 5)).toBe(16);

5. Which of the following is the slowest and most expensive form of testing?

6. Mocking allows you to separate the code that you are testing from its related dependencies.

7. Which of the following statements are true for Node.js?

8. Which of the following is a correct example of a Jest test?

9. Which type of testing involves the process of testing the smallest units of your source code in isolation?

10. Which of the following features does Jest provide? Check all that apply.

11. Following the TDD approach has many benefits. Select all the benefits following the TDD approach has for you as a developer. Check all that apply.

12. What will happen when you run this piece of code on the command line at the root of your project’s folder: npm install –save-dev jest?

MODULE QUIZ: TESTING

1. What is unit testing?

2. When the following test executes, what will the test result be?

    function subtract(a, b) {
        return a - b;
    }

    expect(subtract(10, 4)).toBe(6);

3. What is End-to-end testing (e2e)?

4. What is Code Coverage?

5. Node.js can be used to build web application backends.

6. When the following test executes, what will the test result be?

    function multiply(a, b) {
        return a;
    }

    expect(multiply(2, 2)).toBe(4);

7. Which command is used to install a Node package?

8. Which file lists all your application’s required node packages?

9. A person on your team wants to help with testing. However, they are not a developer and cannot write code. What type of testing is most suited for them?

10. What is the recommended way to separate the code that you are testing from its related dependencies?

Testing CONCLUSION