Set of RSpec tests for an ActiveTriples property that holds multiple URI values

gistfile1.txt

describe 'aggregates' do
  it "should be empty array if we haven't set it" do
    expect(subject.aggregates).to match_array([])
  end

  it "should be set to a URI producing an ActiveTriple::Resource" do
    subject.aggregates = RDF::URI("http://example.org/b1")
    expect(subject.aggregates.first).to be_a ActiveTriples::Resource
  end

  it "should be settable" do
    subject.aggregates = RDF::URI("http://example.org/b1")
    expect(subject.aggregates.first.rdf_subject).to eq RDF::URI("http://example.org/b1")
    ['id']
  end

  it "should be settable to multiple values" do
    bib1 = RDF::URI("http://example.org/b1")
    bib2 = RDF::URI("http://example.org/b2")
    bib3 = RDF::URI("http://example.org/b3")
    subject.aggregates = bib1
    subject.aggregates << bib2
    subject.aggregates << bib3
    expect(subject.aggregates[0].rdf_subject).to eq bib1
    expect(subject.aggregates[1].rdf_subject).to eq bib2
    expect(subject.aggregates[2].rdf_subject).to eq bib3
  end

  it "should be changeable" do
    orig_bib = RDF::URI("http://example.org/b1")
    new_bib  = RDF::URI("http://example.org/b1_NEW")
    subject.aggregates = orig_bib
    subject.aggregates = new_bib
    expect(subject.aggregates.first.rdf_subject).to eq new_bib
  end

  it "should be changeable for multiple values" do
    orig_bib1 = RDF::URI("http://example.org/b1")
    orig_bib2 = RDF::URI("http://example.org/b2")
    orig_bib3 = RDF::URI("http://example.org/b3")

    new_bib1 = RDF::URI("http://example.org/b1_NEW")
    new_bib2 = RDF::URI("http://example.org/b2_NEW")
    new_bib3 = RDF::URI("http://example.org/b3_NEW")

    subject.aggregates = orig_bib1
    subject.aggregates << orig_bib2
    subject.aggregates << orig_bib3

    aggregates = subject.aggregates.dup
    aggregates[0] = new_bib1
    # aggregates[1] = new_bib2
    aggregates[2] = new_bib3
    subject.aggregates = aggregates

    expect(subject.aggregates[0].rdf_subject).to eq new_bib1
    # expect(subject.aggregates[1].rdf_subject).to eq new_bib2
    expect(subject.aggregates[1].rdf_subject).to eq orig_bib2
    expect(subject.aggregates[2].rdf_subject).to eq new_bib3
  end

  it "should be directly changeable for multiple values" do
    orig_bib1 = RDF::URI("http://example.org/b1")
    orig_bib2 = RDF::URI("http://example.org/b2")
    orig_bib3 = RDF::URI("http://example.org/b3")

    new_bib1 = RDF::URI("http://example.org/b1_NEW")
    new_bib2 = RDF::URI("http://example.org/b2_NEW")
    new_bib3 = RDF::URI("http://example.org/b3_NEW")

    subject.aggregates = orig_bib1
    subject.aggregates << orig_bib2
    subject.aggregates << orig_bib3

    subject.aggregates[0] = new_bib1
    # subject.aggregates[1] = new_bib2
    subject.aggregates[2] = new_bib3

    expect(subject.aggregates[0].rdf_subject).to eq new_bib1
    # expect(subject.aggregates[1].rdf_subject).to eq new_bib2
    expect(subject.aggregates[1].rdf_subject).to eq orig_bib2
    expect(subject.aggregates[2].rdf_subject).to eq new_bib3
  end
end

Thank you! I have a PR which passes all of this, here: ActiveTriples/ActiveTriples#46