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Diffstat (limited to 'spec/ruby/core/array/union_spec.rb')
-rw-r--r-- | spec/ruby/core/array/union_spec.rb | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/spec/ruby/core/array/union_spec.rb b/spec/ruby/core/array/union_spec.rb new file mode 100644 index 0000000000..f7fd5c43ac --- /dev/null +++ b/spec/ruby/core/array/union_spec.rb @@ -0,0 +1,82 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Array#|" do + it "returns an array of elements that appear in either array (union)" do + ([] | []).should == [] + ([1, 2] | []).should == [1, 2] + ([] | [1, 2]).should == [1, 2] + ([ 1, 2, 3, 4 ] | [ 3, 4, 5 ]).should == [1, 2, 3, 4, 5] + end + + it "creates an array with no duplicates" do + ([ 1, 2, 3, 1, 4, 5 ] | [ 1, 3, 4, 5, 3, 6 ]).should == [1, 2, 3, 4, 5, 6] + end + + it "creates an array with elements in order they are first encountered" do + ([ 1, 2, 3, 1 ] | [ 1, 3, 4, 5 ]).should == [1, 2, 3, 4, 5] + end + + it "properly handles recursive arrays" do + empty = ArraySpecs.empty_recursive_array + (empty | empty).should == empty + + array = ArraySpecs.recursive_array + (array | []).should == [1, 'two', 3.0, array] + ([] | array).should == [1, 'two', 3.0, array] + (array | array).should == [1, 'two', 3.0, array] + (array | empty).should == [1, 'two', 3.0, array, empty] + end + + it "tries to convert the passed argument to an Array using #to_ary" do + obj = mock('[1,2,3]') + obj.should_receive(:to_ary).and_return([1, 2, 3]) + ([0] | obj).should == ([0] | [1, 2, 3]) + end + + # MRI follows hashing semantics here, so doesn't actually call eql?/hash for Fixnum/Symbol + it "acts as if using an intermediate hash to collect values" do + not_supported_on :opal do + ([5.0, 4.0] | [5, 4]).should == [5.0, 4.0, 5, 4] + end + + str = "x" + ([str] | [str.dup]).should == [str] + + obj1 = mock('1') + obj2 = mock('2') + obj1.should_receive(:hash).at_least(1).and_return(0) + obj2.should_receive(:hash).at_least(1).and_return(0) + obj2.should_receive(:eql?).at_least(1).and_return(true) + + ([obj1] | [obj2]).should == [obj1] + ([obj1, obj1, obj2, obj2] | [obj2]).should == [obj1] + + obj1 = mock('3') + obj2 = mock('4') + obj1.should_receive(:hash).at_least(1).and_return(0) + obj2.should_receive(:hash).at_least(1).and_return(0) + obj2.should_receive(:eql?).at_least(1).and_return(false) + + ([obj1] | [obj2]).should == [obj1, obj2] + ([obj1, obj1, obj2, obj2] | [obj2]).should == [obj1, obj2] + end + + it "does not return subclass instances for Array subclasses" do + (ArraySpecs::MyArray[1, 2, 3] | []).should be_an_instance_of(Array) + (ArraySpecs::MyArray[1, 2, 3] | ArraySpecs::MyArray[1, 2, 3]).should be_an_instance_of(Array) + ([] | ArraySpecs::MyArray[1, 2, 3]).should be_an_instance_of(Array) + end + + it "does not call to_ary on array subclasses" do + ([1, 2] | ArraySpecs::ToAryArray[5, 6]).should == [1, 2, 5, 6] + end + + it "properly handles an identical item even when its #eql? isn't reflexive" do + x = mock('x') + x.should_receive(:hash).at_least(1).and_return(42) + x.stub!(:eql?).and_return(false) # Stubbed for clarity and latitude in implementation; not actually sent by MRI. + + ([x] | [x]).should == [x] + end +end |