describe 'Ridgepole::Client#diff -> migrate' do
  context 'when change index (unique: false)' do
    let(:actual_dsl) do
      erbh(<<-ERB)
        create_table "salaries", force: :cascade do |t|
          t.integer "emp_no", null: false
          t.integer "salary", null: false
          t.date    "from_date", null: false
          t.date    "to_date", null: false
          t.index ["emp_no", "id"], name: "emp_no", <%= i cond(5.0, using: :btree) %>
        end
      ERB
    end

    let(:expected_dsl) do
      erbh(<<-ERB)
        create_table "salaries", force: :cascade do |t|
          t.integer "emp_no", null: false
          t.integer "salary", null: false
          t.date    "from_date", null: false
          t.date    "to_date", null: false
          t.index ["emp_no", "id"], name: "emp_no", unique: false, <%= i cond(5.0, using: :btree) %>
        end
      ERB
    end

    before { subject.diff(actual_dsl).migrate }
    subject { client }

    it {
      delta = subject.diff(expected_dsl)
      expect(delta.differ?).to be_falsy
    }
  end

  context 'when change index (unique: true)' do
    let(:actual_dsl) do
      erbh(<<-ERB)
        create_table "salaries", force: :cascade do |t|
          t.integer "emp_no", null: false
          t.integer "salary", null: false
          t.date    "from_date", null: false
          t.date    "to_date", null: false
          t.index ["emp_no", "id"], name: "emp_no", <%= i cond(5.0, using: :btree) %>
        end
      ERB
    end

    let(:expected_dsl) do
      erbh(<<-ERB)
        create_table "salaries", force: :cascade do |t|
          t.integer "emp_no", null: false
          t.integer "salary", null: false
          t.date    "from_date", null: false
          t.date    "to_date", null: false
          t.index ["emp_no", "id"], name: "emp_no", unique: true, <%= i cond(5.0, using: :btree) %>
        end
      ERB
    end

    before { subject.diff(actual_dsl).migrate }
    subject { client }

    it {
      delta = subject.diff(expected_dsl)
      expect(delta.differ?).to be_truthy
      expect(subject.dump).to match_ruby actual_dsl
      delta.migrate
      expect(subject.dump).to match_ruby expected_dsl
    }
  end
end