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require 'spec_helper'
require 'immutable/set'
describe Immutable::Set do
let(:set) { S[*values] }
describe '#grep_v' do
let(:grep_v) { set.grep_v(String, &block) }
shared_examples 'check filtered values' do
it 'returns the filtered values' do
expect(grep_v).to eq(S[*filtered])
end
end
context 'without a block' do
let(:block) { nil }
context 'with an empty set' do
let(:values) { [] }
let(:filtered) { [] }
include_examples 'check filtered values'
end
context 'with a single item set' do
let(:values) { ['A'] }
let(:filtered) { [] }
include_examples 'check filtered values'
end
context "with a single item set that doesn't contain match" do
let(:values) { [1] }
let(:filtered) { [1] }
include_examples 'check filtered values'
end
context "with a multi-item set where one isn't a match" do
let(:values) { [2, 'C', 4] }
let(:filtered) { [2, 4] }
include_examples 'check filtered values'
end
end
describe 'with a block' do
let(:block) { ->(item) { item + 100 }}
context 'resulting items are processed with the block' do
let(:values) { [2, 'C', 4] }
let(:filtered) { [102, 104] }
include_examples 'check filtered values'
end
end
end
end
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