require 'rails_helper' require 'email' describe Enum do let(:array_enum) { Enum.new(:jake, :finn, :princess_bubblegum, :peppermint_butler) } let(:hash_enum) { Enum.new(jake: 1, finn: 2, princess_bubblegum: 3, peppermint_butler: 4) } describe ".[]" do it "looks up a number by symbol" do expect(array_enum[:princess_bubblegum]).to eq(3) expect(hash_enum[:princess_bubblegum]).to eq(3) end it "looks up a symbol by number" do expect(array_enum[2]).to eq(:finn) expect(hash_enum[2]).to eq(:finn) end end describe ".valid?" do it "returns true if a key exists" do expect(array_enum.valid?(:finn)).to eq(true) expect(hash_enum.valid?(:finn)).to eq(true) end it "returns false if a key does not exist" do expect(array_enum.valid?(:obama)).to eq(false) expect(hash_enum.valid?(:obama)).to eq(false) end end describe ".only" do it "returns only the values we ask for" do expect(array_enum.only(:jake, :princess_bubblegum)).to eq(jake: 1, princess_bubblegum: 3) expect(hash_enum.only(:jake, :princess_bubblegum)).to eq(jake: 1, princess_bubblegum: 3) end end describe ".except" do it "returns everything but the values we ask to delete" do expect(array_enum.except(:jake, :princess_bubblegum)).to eq(finn: 2, peppermint_butler: 4) expect(hash_enum.except(:jake, :princess_bubblegum)).to eq(finn: 2, peppermint_butler: 4) end end context "allows to specify number of first enum member" do it "number of first enum member should be 0 " do start_enum = Enum.new(:jake, :finn, :princess_bubblegum, :peppermint_butler, start: 0) expect(start_enum[:princess_bubblegum]).to eq(2) end end end