diff options
Diffstat (limited to 'spec/ruby/core/enumerable/group_by_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/group_by_spec.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/group_by_spec.rb b/spec/ruby/core/enumerable/group_by_spec.rb new file mode 100644 index 0000000000..3513512ebf --- /dev/null +++ b/spec/ruby/core/enumerable/group_by_spec.rb @@ -0,0 +1,45 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/enumerable_enumeratorized', __FILE__) + +describe "Enumerable#group_by" do + it "returns a hash with values grouped according to the block" do + e = EnumerableSpecs::Numerous.new("foo", "bar", "baz") + h = e.group_by { |word| word[0..0].to_sym } + h.should == { f: ["foo"], b: ["bar", "baz"]} + end + + it "returns an empty hash for empty enumerables" do + EnumerableSpecs::Empty.new.group_by { |x| x}.should == {} + end + + it "returns a hash without default_proc" do + e = EnumerableSpecs::Numerous.new("foo", "bar", "baz") + h = e.group_by { |word| word[0..0].to_sym } + h[:some].should be_nil + h.default_proc.should be_nil + h.default.should be_nil + end + + it "returns an Enumerator if called without a block" do + EnumerableSpecs::Numerous.new.group_by.should be_an_instance_of(Enumerator) + end + + it "gathers whole arrays as elements when each yields multiple" do + e = EnumerableSpecs::YieldsMulti.new + h = e.group_by { |i| i } + h.should == { [1, 2] => [[1, 2]], + [6, 7, 8, 9] => [[6, 7, 8, 9]], + [3, 4, 5] => [[3, 4, 5]] } + end + + it "returns a tainted hash if self is tainted" do + EnumerableSpecs::Empty.new.taint.group_by {}.tainted?.should be_true + end + + it "returns an untrusted hash if self is untrusted" do + EnumerableSpecs::Empty.new.untrust.group_by {}.untrusted?.should be_true + end + + it_behaves_like :enumerable_enumeratorized_with_origin_size, :group_by +end |