describe "Tests" do
  it "a test case" do
    Test.assert_equals(add(1, 1), 2, "optional message")
  end
end

TODO Improve the descriptions while keeping them simple.

Checks that the actual value equals the expected value.

Checks that the actual value does not equal the unexpected value.

Checks that block raises an error.

Checks that block raises no error.

Checks that passed is truthy.

Returns a random number.

Returns a random string.