1 files changed, 12 insertions, 69 deletions
diff --git a/spec/ruby/core/array/union_spec.rb b/spec/ruby/core/array/union_spec.rb
index 0e177715e5..110894e83d 100644
--- a/spec/ruby/core/array/union_spec.rb
+++ b/spec/ruby/core/array/union_spec.rb
@@ -1,82 +1,25 @@
 require_relative '../../spec_helper'
 require_relative 'fixtures/classes'
+require_relative 'shared/union'
 
 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.stub!(:hash).and_return(0)
-    obj2.stub!(:hash).and_return(0)
-    obj2.should_receive(:eql?).at_least(1).and_return(true)
-
-    ([obj1] | [obj2]).should == [obj1]
-    ([obj1, obj1, obj2, obj2] | [obj2]).should == [obj1]
+  it_behaves_like :array_binary_union, :|
+end
 
-    obj1 = mock('3')
-    obj2 = mock('4')
-    obj1.stub!(:hash).and_return(0)
-    obj2.stub!(:hash).and_return(0)
-    obj2.should_receive(:eql?).at_least(1).and_return(false)
+describe "Array#union" do
+  it_behaves_like :array_binary_union, :union
 
-    ([obj1] | [obj2]).should == [obj1, obj2]
-    ([obj1, obj1, obj2, obj2] | [obj2]).should == [obj1, obj2]
+  it "returns unique elements when given no argument" do
+    x = [1, 2, 3, 2]
+    x.union.should == [1, 2, 3]
   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]
+    ArraySpecs::MyArray[1, 2, 3].union.should.instance_of?(Array)
   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 "accepts multiple arguments" do
+    x = [1, 2, 3]
+    x.union(x, x, x, x, [3, 4], x).should == [1, 2, 3, 4]
   end
 end