I'm using R's assertthat package and am wanting to (temporarily) output a warning instead of an error on assertion failure. What's the easiest way to do that with the assertthat package? I realize...

To use Hamcrest with JUnit 4 we use an assertThat() function. However, JUnit 5 is no longer going to have an assertThat() function. How do I use Hamcrest without an assertThat()?

I have a certain method that delivers a Restriction-object (where Restriction is an interface). And since its implementation is already testet, I just want to test if my method actually delivers a ...