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# frozen_string_literal: true
RSpec.describe RuboCop::AST::WhenNode do
let(:when_node) { parse_source(source).ast.children[1] }
describe '.new' do
let(:source) do
['case',
'when :foo then bar',
'end'].join("\n")
end
it { expect(when_node.is_a?(described_class)).to be(true) }
end
describe '#conditions' do
context 'with a single condition' do
let(:source) do
['case',
'when :foo then bar',
'end'].join("\n")
end
it { expect(when_node.conditions.size).to eq(1) }
it { expect(when_node.conditions).to all(be_literal) }
end
context 'with a multiple conditions' do
let(:source) do
['case',
'when :foo, :bar, :baz then bar',
'end'].join("\n")
end
it { expect(when_node.conditions.size).to eq(3) }
it { expect(when_node.conditions).to all(be_literal) }
end
end
describe '#each_condition' do
let(:source) do
['case',
'when :foo, :bar, :baz then bar',
'end'].join("\n")
end
context 'when not passed a block' do
it { expect(when_node.each_condition.is_a?(Enumerator)).to be(true) }
end
context 'when passed a block' do
it 'yields all the conditions' do
expect { |b| when_node.each_condition(&b) }
.to yield_successive_args(*when_node.conditions)
end
end
end
describe '#then?' do
context 'with a then keyword' do
let(:source) do
['case',
'when :foo then bar',
'end'].join("\n")
end
it { expect(when_node.then?).to be_truthy }
end
context 'without a then keyword' do
let(:source) do
['case',
'when :foo',
' bar',
'end'].join("\n")
end
it { expect(when_node.then?).to be_falsey }
end
end
describe '#body' do
context 'with a then keyword' do
let(:source) do
['case',
'when :foo then :bar',
'end'].join("\n")
end
it { expect(when_node.body.sym_type?).to be(true) }
end
context 'without a then keyword' do
let(:source) do
['case',
'when :foo',
' [:bar, :baz]',
'end'].join("\n")
end
it { expect(when_node.body.array_type?).to be(true) }
end
end
describe '#branch_index' do
let(:source) do
['case',
'when :foo then 1',
'when :bar then 2',
'when :baz then 3',
'end'].join("\n")
end
let(:whens) { parse_source(source).ast.children[1...-1] }
it { expect(whens[0].branch_index).to eq(0) }
it { expect(whens[1].branch_index).to eq(1) }
it { expect(whens[2].branch_index).to eq(2) }
end
end
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