Practice Creating Mocks (15.7.1) - Unit Testing and Test-Driven Development (JUnit, Mockito)

Practice: Creating Mocks

Lesson 15.7.1Unit Testing and Test-Driven Development (JUnit, Mockito)

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11 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
5 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a mock in unit testing?
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Think about why we would want to isolate parts of our code when testing.
Question 2.
What annotation do we use to create a mock in Mockito?
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This annotation signifies a variable that will not hold a real instance.
3Question 3.
What does the @Mock annotation do in Mockito?
- It injects a mock into the class
- It creates a mock object
- It sets the behavior of a mock
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What action does this annotation perform specifically?
4Question 4.
True or False: Using mocks allows for testing components in isolation.
- True
- False
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Think about the purpose of mocks in testing frameworks.
Question 5.
Write a complete JUnit test case that uses Mockito to isolate a service class and verify its interactions.
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Consider how to structure your test class and remember to use assertions after invoking the method under test.
Question 6.
Describe a scenario in which using mocks could lead to misleading results in unit testing, and how to mitigate that risk.
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Think about how too much reliance on mocks might obscure real issues in dependencies.

7 more questions in this section. Enroll free to practise them all.