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# frozen_string_literal: true
require 'support'
require 'mustermann/equality_map'
RSpec.describe Mustermann::EqualityMap do
before { GC.disable }
after { GC.enable }
describe :fetch do
subject { Mustermann::EqualityMap.new }
specify 'with existing entry' do
next if subject.is_a? Hash
subject.fetch("foo") { "foo" }
result = subject.fetch("foo") { "bar" }
expect(result).to be == "foo"
end
specify 'with GC-removed entry' do
next if subject.is_a? Hash
subject.fetch(String.new('foo')) { "foo" }
expect(subject.map).to receive(:[]).and_return(nil)
result = subject.fetch(String.new('foo')) { "bar" }
expect(result).to be == "bar"
end
specify 'allows a frozen key and value' do
next if subject.is_a? Hash
key = "foo".freeze
value = "bar".freeze
subject.fetch(key) { value }
result = subject.fetch("foo".dup) { raise "not executed" }
expect(result).to be == value
expect(result).not_to equal value
end
specify 'allows only a single argument to be compatible with Hash#fetch' do
expect {
subject.fetch("foo", "bar", "baz") { "value" }
}.to raise_error(ArgumentError)
end
end
end
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