use BDD::Behave;

class Foo {
  has $.bar;
  has $.baz;

  submethod BUILD(:$!bar) {
    $!baz = 42;
  }
}

let(:foo) => { Foo.new(:bar(17)) };

describe -> 'Foo' {
  it -> '.bar' {
    expect(:foo.bar).to.be(17);
  }

  it -> '.baz' {
    expect(:foo.baz).to.be(42);
  }
}