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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Array#delete" do
it "removes elements that are #== to object" do
x = mock('delete')
def x.==(other) 3 == other end
a = [1, 2, 3, x, 4, 3, 5, x]
a.delete mock('not contained')
a.should == [1, 2, 3, x, 4, 3, 5, x]
a.delete 3
a.should == [1, 2, 4, 5]
end
it "calculates equality correctly for reference values" do
a = ["foo", "bar", "foo", "quux", "foo"]
a.delete "foo"
a.should == ["bar","quux"]
end
it "returns object or nil if no elements match object" do
[1, 2, 4, 5].delete(1).should == 1
[1, 2, 4, 5].delete(3).should == nil
end
it "may be given a block that is executed if no element matches object" do
[1].delete(1) {:not_found}.should == 1
[].delete('a') {:not_found}.should == :not_found
end
it "returns nil if the array is empty due to a shift" do
a = [1]
a.shift
a.delete(nil).should == nil
end
it "returns nil on a frozen array if a modification does not take place" do
[1, 2, 3].freeze.delete(0).should == nil
end
it "raises a FrozenError on a frozen array" do
-> { [1, 2, 3].freeze.delete(1) }.should raise_error(FrozenError)
end
end
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