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# frozen_string_literal: true
RSpec.describe SnakyHash::Extensions do
subject(:extensions) { described_class.new }
describe "#add" do
it "adds a new extension" do
extensions.add(:test) { 1 }
added = extensions.instance_variable_get(:@extensions)
expect(added[:test]).to be_a Proc
expect(added[:test].call).to eq 1
end
it "raises an error if an extension with a given name is already defined" do
extensions.add(:test) { 1 }
expect do
extensions.add(:test) { 2 }
end.to raise_error SnakyHash::Error, /already defined/
end
end
describe "#run" do
it "runs through all extensions" do
extensions.add(:upcase) { |v| v.upcase }
extensions.add(:exclaim) { |v| v.to_s + "!!!" }
expect(extensions.run("hello")).to eq "HELLO!!!"
end
end
describe "#has?" do
it "returns true if the extension has been added" do
extensions.add(:upcase) { |v| v.upcase }
expect(extensions.has?(:upcase)).to be true
end
it "returns false if no extension exists" do
expect(extensions.has?(:upcase)).to be false
end
end
end
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