Add assertAll?

[JLLeitschuh]

This might be outside of the scope of this assertion library but a kotlin friendly way of declaring multiple assertions in a single test would be nice to add.

I'm opening this issue due to the discussion in the Junit5:

junit-team/junit5#924

Is this outside the scope of this project? If not, this method should probably throw the org.opentest4j.MultipleFailuresError which would require creating a dependency on opentest4j

[npryce]

You can do: assertThat(aThing, isFoo and isBar and isBaz)

where isFoo, isBar and isBar are matchers.

[npryce]

I can imagine an API like...

assertAll(
    { assertThat(aThing, isFoo) },
    { assertThat(anotherThing, isBar) },
    { assertThat(andAnother, isBaz) }
)

Or maybe some DSL-ish syntactic sugar:

assert { 
    assertThat(aThing, isFoo) 
} and { 
    assertThat(anotherThing, isBar) 
} and { assertThat(andAnother, isBaz) }

But that API would only have a dependency on opentest4j (for MultipleFailuresError) and not directly on HamKrest.

[JLLeitschuh]

This is now part of JUnit 5 and will be available in release 5.1.
junit-team/junit5#1001