diff options
Diffstat (limited to 'spec/ruby/core/enumerator/product/each_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerator/product/each_spec.rb | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/product/each_spec.rb b/spec/ruby/core/enumerator/product/each_spec.rb new file mode 100644 index 0000000000..cabeb9d93a --- /dev/null +++ b/spec/ruby/core/enumerator/product/each_spec.rb @@ -0,0 +1,73 @@ +require_relative '../../../spec_helper' +require_relative '../../enumerable/shared/enumeratorized' + +ruby_version_is "3.2" do + describe "Enumerator::Product#each" do + it_behaves_like :enumeratorized_with_origin_size, :each, Enumerator::Product.new([1, 2], [:a, :b]) + + it "yields each element of Cartesian product of enumerators" do + enum = Enumerator::Product.new([1, 2], [:a, :b]) + acc = [] + enum.each { |e| acc << e } + acc.should == [[1, :a], [1, :b], [2, :a], [2, :b]] + end + + it "calls #each_entry method on enumerators" do + object1 = Object.new + def object1.each_entry + yield 1 + yield 2 + end + + object2 = Object.new + def object2.each_entry + yield :a + yield :b + end + + enum = Enumerator::Product.new(object1, object2) + acc = [] + enum.each { |e| acc << e } + acc.should == [[1, :a], [1, :b], [2, :a], [2, :b]] + end + + it "raises a NoMethodError if the object doesn't respond to #each_entry" do + -> { + Enumerator::Product.new(Object.new).each {} + }.should raise_error(NoMethodError, /undefined method [`']each_entry' for/) + end + + it "returns enumerator if not given a block" do + enum = Enumerator::Product.new([1, 2], [:a, :b]) + enum.each.should.kind_of?(Enumerator) + + enum = Enumerator::Product.new([1, 2], [:a, :b]) + enum.each.to_a.should == [[1, :a], [1, :b], [2, :a], [2, :b]] + end + + it "returns self if given a block" do + enum = Enumerator::Product.new([1, 2], [:a, :b]) + enum.each {}.should.equal?(enum) + end + + it "doesn't accept arguments" do + Enumerator::Product.instance_method(:each).arity.should == 0 + end + + it "yields each element to a block that takes multiple arguments" do + enum = Enumerator::Product.new([1, 2], [:a, :b]) + + acc = [] + enum.each { |x, y| acc << x } + acc.should == [1, 1, 2, 2] + + acc = [] + enum.each { |x, y| acc << y } + acc.should == [:a, :b, :a, :b] + + acc = [] + enum.each { |x, y, z| acc << z } + acc.should == [nil, nil, nil, nil] + end + end +end |