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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 "returns self" do
a = [1, 2, 3]
a.send(@method, "a").should.equal?(a)
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 FrozenError on a frozen array when the array is modified" do
-> { ArraySpecs.frozen_array.send(@method, 1) }.should raise_error(FrozenError)
end
# see [ruby-core:23666]
it "raises a FrozenError on a frozen array when the array would not be modified" do
-> { ArraySpecs.frozen_array.send(@method) }.should raise_error(FrozenError)
end
# https://github.com/oracle/truffleruby/issues/2772
it "doesn't rely on Array#[]= so it can be overridden" do
subclass = Class.new(Array) do
def []=(*)
raise "[]= is called"
end
end
array = subclass.new
array.send(@method, 1)
array.should == [1]
end
end
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