diff options
Diffstat (limited to 'spec/ruby/core/array/intersection_spec.rb')
-rw-r--r-- | spec/ruby/core/array/intersection_spec.rb | 88 |
1 files changed, 11 insertions, 77 deletions
diff --git a/spec/ruby/core/array/intersection_spec.rb b/spec/ruby/core/array/intersection_spec.rb index 7bf2ec4dbe..27d90f1e44 100644 --- a/spec/ruby/core/array/intersection_spec.rb +++ b/spec/ruby/core/array/intersection_spec.rb @@ -1,87 +1,21 @@ require_relative '../../spec_helper' require_relative 'fixtures/classes' +require_relative 'shared/intersection' describe "Array#&" do - it "creates an array with elements common to both arrays (intersection)" do - ([] & []).should == [] - ([1, 2] & []).should == [] - ([] & [1, 2]).should == [] - ([ 1, 3, 5 ] & [ 1, 2, 3 ]).should == [1, 3] - end - - it "creates an array with no duplicates" do - ([ 1, 1, 3, 5 ] & [ 1, 2, 3 ]).uniq!.should == nil - end - - it "creates an array with elements in order they are first encountered" do - ([ 1, 2, 3, 2, 5 ] & [ 5, 2, 3, 4 ]).should == [2, 3, 5] - end - - it "does not modify the original Array" do - a = [1, 1, 3, 5] - (a & [1, 2, 3]).should == [1, 3] - a.should == [1, 1, 3, 5] - end - - it "properly handles recursive arrays" do - empty = ArraySpecs.empty_recursive_array - (empty & empty).should == empty - - (ArraySpecs.recursive_array & []).should == [] - ([] & ArraySpecs.recursive_array).should == [] - - (ArraySpecs.recursive_array & ArraySpecs.recursive_array).should == [1, 'two', 3.0, ArraySpecs.recursive_array] - end + it_behaves_like :array_intersection, :& +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]) - ([1, 2] & obj).should == ([1, 2]) - end +ruby_version_is "2.7" do + describe "Array#intersection" do + it_behaves_like :array_intersection, :intersection - it "determines equivalence between elements in the sense of eql?" do - not_supported_on :opal do - ([5.0, 4.0] & [5, 4]).should == [] + it "accepts multiple arguments" do + [1, 2, 3, 4].intersection([1, 2, 3], [2, 3, 4]).should == [2, 3] end - str = "x" - ([str] & [str.dup]).should == [str] - - obj1 = mock('1') - obj2 = mock('2') - obj1.stub!(:hash).and_return(0) - obj2.stub!(:hash).and_return(0) - obj1.should_receive(:eql?).at_least(1).and_return(true) - obj2.stub!(:eql?).and_return(true) - - ([obj1] & [obj2]).should == [obj1] - ([obj1, obj1, obj2, obj2] & [obj2]).should == [obj1] - - obj1 = mock('3') - obj2 = mock('4') - obj1.stub!(:hash).and_return(0) - obj2.stub!(:hash).and_return(0) - obj1.should_receive(:eql?).at_least(1).and_return(false) - - ([obj1] & [obj2]).should == [] - ([obj1, obj1, obj2, obj2] & [obj2]).should == [obj2] - end - - it "does 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 - ([5, 6] & ArraySpecs::ToAryArray[1, 2, 5, 6]).should == [5, 6] - end - - it "properly handles an identical item even when its #eql? isn't reflexive" do - x = mock('x') - x.stub!(:hash).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] + it "preserves elements order from original array" do + [1, 2, 3, 4].intersection([3, 2, 1]).should == [1, 2, 3] + end end end |