What are some advanced assertions in JUnit 5?

What are some advanced assertions in JUnit 5?

JUnit 5 offers several advanced assertions like assertAll, assertThrows, and assertTimeout. Would you like examples?

Yes, please provide examples for each of those assertions.

Sure! For assertAll, you can group multiple assertions together. For example:

assertAll(
    () -> assertEquals(2, 1 + 1),
    () -> assertTrue("Hello".startsWith("H"))
);

For assertThrows, you can check for exceptions:

assertThrows(IllegalArgumentException.class, () -> {
    throw new IllegalArgumentException("Invalid argument");
});

And for assertTimeout, you can assert that a block of code completes within a certain time:

assertTimeout(Duration.ofSeconds(1), () -> {
    // code that should complete in under 1 second
});

These examples are really helpful! Can you explain when to use each of these assertions?

Absolutely! Use assertAll when you want to validate multiple conditions at once without stopping at the first failure. assertThrows is great for testing that specific exceptions are thrown in error scenarios. Finally, use assertTimeout to ensure that your code performs efficiently and completes within a specified time limit.