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