But that's the thing.

    rspec:    @micropost.should respond_to(:context)
    testunit: assert @micropost.respond_to?(:context)

    rspec:    @micropost.should be_valid
    testunit: assert @micropost.valid?

    rspec:    @micropost.should_not be_valid
    testunit: refute @micropost.valid?

The testunit It's Just Ruby examples end up looking like the syntactic sugar!