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What does the fail() method do in JUnit?

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What does the fail() method do in JUnit?

(a) Throws an assertion error unconditionally

(b) Calls the default constructor

(c) Outputs the message “Fail” to the console

(d) Pauses the test for 1 second

I got this question in examination.

My query is from Running Parameterized Tests in portion Exploring Core JUnit of JUnit

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Correct choice is (a) Throws an assertion error unconditionally

To explain I would say: The method throws an assertion error unconditionally. This might be helpful to show an incomplete test (maybe still being worked upon) or to ensure that an expected exception is thrown.

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