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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Array#compact" do
it "returns a copy of array with all nil elements removed" do
a = [1, 2, 4]
a.compact.should == [1, 2, 4]
a = [1, nil, 2, 4]
a.compact.should == [1, 2, 4]
a = [1, 2, 4, nil]
a.compact.should == [1, 2, 4]
a = [nil, 1, 2, 4]
a.compact.should == [1, 2, 4]
end
it "does not return self" do
a = [1, 2, 3]
a.compact.should_not equal(a)
end
it "does not return subclass instance for Array subclasses" do
ArraySpecs::MyArray[1, 2, 3, nil].compact.should be_an_instance_of(Array)
end
end
describe "Array#compact!" do
it "removes all nil elements" do
a = ['a', nil, 'b', false, 'c']
a.compact!.should equal(a)
a.should == ["a", "b", false, "c"]
a = [nil, 'a', 'b', false, 'c']
a.compact!.should equal(a)
a.should == ["a", "b", false, "c"]
a = ['a', 'b', false, 'c', nil]
a.compact!.should equal(a)
a.should == ["a", "b", false, "c"]
end
it "returns self if some nil elements are removed" do
a = ['a', nil, 'b', false, 'c']
a.compact!.should equal a
end
it "returns nil if there are no nil elements to remove" do
[1, 2, false, 3].compact!.should == nil
end
it "raises a FrozenError on a frozen array" do
-> { ArraySpecs.frozen_array.compact! }.should raise_error(FrozenError)
end
end
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