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|
# frozen_string_literal: true
RSpec.describe RuboCop::AST::CaseNode do
let(:ast) { parse_source(source).ast }
let(:case_node) { ast }
describe '.new' do
let(:source) do
['case',
'when :foo then bar',
'end'].join("\n")
end
it { expect(case_node.is_a?(described_class)).to be(true) }
end
describe '#keyword' do
let(:source) do
['case',
'when :foo then bar',
'end'].join("\n")
end
it { expect(case_node.keyword).to eq('case') }
end
describe '#when_branches' do
let(:source) do
['case',
'when :foo then 1',
'when :bar then 2',
'when :baz then 3',
'end'].join("\n")
end
it { expect(case_node.when_branches.size).to eq(3) }
it { expect(case_node.when_branches).to all(be_when_type) }
end
describe '#each_when' do
let(:source) do
['case',
'when :foo then 1',
'when :bar then 2',
'when :baz then 3',
'end'].join("\n")
end
context 'when not passed a block' do
it { expect(case_node.each_when.is_a?(Enumerator)).to be(true) }
end
context 'when passed a block' do
it 'yields all the conditions' do
expect { |b| case_node.each_when(&b) }
.to yield_successive_args(*case_node.when_branches)
end
end
end
describe '#else?' do
context 'without an else statement' do
let(:source) do
['case',
'when :foo then :bar',
'end'].join("\n")
end
it { expect(case_node.else?).to be_falsey }
end
context 'with an else statement' do
let(:source) do
['case',
'when :foo then :bar',
'else :baz',
'end'].join("\n")
end
it { expect(case_node.else?).to be_truthy }
end
end
describe '#else_branch' do
describe '#else?' do
context 'without an else statement' do
let(:source) do
['case',
'when :foo then :bar',
'end'].join("\n")
end
it { expect(case_node.else_branch.nil?).to be(true) }
end
context 'with an else statement' do
let(:source) do
['case',
'when :foo then :bar',
'else :baz',
'end'].join("\n")
end
it { expect(case_node.else_branch.sym_type?).to be(true) }
end
end
end
describe '#branches' do
context 'when there is an else' do
let(:source) { <<~RUBY }
case
when :foo then # do nothing
when :bar then 42
else 'hello'
end
RUBY
it 'returns all the bodies' do
expect(case_node.branches).to match [nil, be_int_type, be_str_type]
end
context 'with an empty else' do
let(:source) { <<~RUBY }
case
when :foo then # do nothing
when :bar then 42
else # do nothing
end
RUBY
it 'returns all the bodies' do
expect(case_node.branches).to match [nil, be_int_type, nil]
end
end
end
context 'when there is no else keyword' do
let(:source) { <<~RUBY }
case
when :foo then # do nothing
when :bar then 42
end
RUBY
it 'returns only then when bodies' do
expect(case_node.branches).to match [nil, be_int_type]
end
end
context 'when compared to an IfNode' do
let(:source) { <<~RUBY }
case
when foo then 1
when bar then 2
else
end
if foo then 1
elsif bar then 2
else
end
RUBY
let(:case_node) { ast.children.first }
let(:if_node) { ast.children.last }
it 'returns the same' do
expect(case_node.branches).to eq if_node.branches
end
end
end
end
|
