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describe :array_unshift, shared: true do
it "prepends object to the original array" do
a = [1, 2, 3]
a.send(@method, "a").should equal(a)
a.should == ['a', 1, 2, 3]
a.send(@method).should equal(a)
a.should == ['a', 1, 2, 3]
a.send(@method, 5, 4, 3)
a.should == [5, 4, 3, 'a', 1, 2, 3]
# shift all but one element
a = [1, 2]
a.shift
a.send(@method, 3, 4)
a.should == [3, 4, 2]
# now shift all elements
a.shift
a.shift
a.shift
a.send(@method, 3, 4)
a.should == [3, 4]
end
it "quietly ignores unshifting nothing" do
[].send(@method).should == []
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.send(@method, :new).should == [:new, empty]
array = ArraySpecs.recursive_array
array.send(@method, :new)
array[0..5].should == [:new, 1, 'two', 3.0, array, array]
end
it "raises a RuntimeError on a frozen array when the array is modified" do
lambda { ArraySpecs.frozen_array.send(@method, 1) }.should raise_error(RuntimeError)
end
# see [ruby-core:23666]
it "raises a RuntimeError on a frozen array when the array would not be modified" do
lambda { ArraySpecs.frozen_array.send(@method) }.should raise_error(RuntimeError)
end
end
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