Learn Java Unit Testing with JUnit 5 in 20 Steps - Step 03 - Absence of failure is success

The video tutorial introduces unit testing, emphasizing that the absence of failure indicates success. It explains the importance of assertions in JUnit tests, which are checks to ensure the code under test produces expected results. The tutorial provides examples, such as testing a method's output, to illustrate how assertions work. It concludes by highlighting the necessity of assertions for effective unit testing and hints at further learning on writing assertions.

What does a green bar indicate in JUnit testing?

• The test is running.

• The test has succeeded.

• The test is incomplete.

• The test has failed.

What is the role of assertions in unit testing?

• To document the test process.

• To compile the test code.

• To execute the code under test.

• To check if the output matches the expected result.

What happens if a unit test lacks assertions?

• The test will not compile.

• The test will succeed regardless of the output.

• The test will run indefinitely.

• The test will always fail.

In the example provided, what is the expected length of the string 'ABCD'?

• 6

• 3

• 4

• 5

What is the fundamental principle of unit testing as discussed?

• Unit tests are optional in software development.

• Success is determined by the presence of assertions.

• Absence of failure is considered success.

• Tests should always fail initially.