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Diffstat (limited to 'spec/ruby/core/array/values_at_spec.rb')
-rw-r--r-- | spec/ruby/core/array/values_at_spec.rb | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/spec/ruby/core/array/values_at_spec.rb b/spec/ruby/core/array/values_at_spec.rb new file mode 100644 index 0000000000..f36356f0d3 --- /dev/null +++ b/spec/ruby/core/array/values_at_spec.rb @@ -0,0 +1,63 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Array#values_at" do + it "returns an array of elements at the indexes when passed indexes" do + [1, 2, 3, 4, 5].values_at().should == [] + [1, 2, 3, 4, 5].values_at(1, 0, 5, -1, -8, 10).should == [2, 1, nil, 5, nil, nil] + end + + it "calls to_int on its indices" do + obj = mock('1') + def obj.to_int() 1 end + [1, 2].values_at(obj, obj, obj).should == [2, 2, 2] + end + + it "properly handles recursive arrays" do + empty = ArraySpecs.empty_recursive_array + empty.values_at(0, 1, 2).should == [empty, nil, nil] + + array = ArraySpecs.recursive_array + array.values_at(0, 1, 2, 3).should == [1, 'two', 3.0, array] + end + + describe "when passed ranges" do + it "returns an array of elements in the ranges" do + [1, 2, 3, 4, 5].values_at(0..2, 1...3, 2..-2).should == [1, 2, 3, 2, 3, 3, 4] + [1, 2, 3, 4, 5].values_at(6..4).should == [] + end + + it "calls to_int on arguments of ranges" do + from = mock('from') + to = mock('to') + + # So we can construct a range out of them... + def from.<=>(o) 0 end + def to.<=>(o) 0 end + + def from.to_int() 1 end + def to.to_int() -2 end + + ary = [1, 2, 3, 4, 5] + ary.values_at(from .. to, from ... to, to .. from).should == [2, 3, 4, 2, 3] + end + end + + describe "when passed a range" do + it "fills with nil if the index is out of the range" do + [0, 1].values_at(0..3).should == [0, 1, nil, nil] + [0, 1].values_at(2..4).should == [nil, nil, nil] + end + + describe "on an empty array" do + it "fills with nils if the index is out of the range" do + [].values_at(0..2).should == [nil, nil, nil] + [].values_at(1..3).should == [nil, nil, nil] + end + end + end + + it "does not return subclass instance on Array subclasses" do + ArraySpecs::MyArray[1, 2, 3].values_at(0, 1..2, 1).should be_an_instance_of(Array) + end +end |