require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Array.new" do it "returns an instance of Array" do Array.new.should be_an_instance_of(Array) end it "returns an instance of a subclass" do ArraySpecs::MyArray.new(1, 2).should be_an_instance_of(ArraySpecs::MyArray) end it "raises an ArgumentError if passed 3 or more arguments" do -> do [1, 2].send :initialize, 1, 'x', true end.should raise_error(ArgumentError) -> do [1, 2].send(:initialize, 1, 'x', true) {} end.should raise_error(ArgumentError) end end describe "Array.new with no arguments" do it "returns an empty array" do Array.new.should be_empty end it "does not use the given block" do ->{ Array.new { raise } }.should_not raise_error end end describe "Array.new with (array)" do it "returns an array initialized to the other array" do b = [4, 5, 6] Array.new(b).should == b end it "does not use the given block" do ->{ Array.new([1, 2]) { raise } }.should_not raise_error end it "calls #to_ary to convert the value to an array" do a = mock("array") a.should_receive(:to_ary).and_return([1, 2]) a.should_not_receive(:to_int) Array.new(a).should == [1, 2] end it "does not call #to_ary on instances of Array or subclasses of Array" do a = [1, 2] a.should_not_receive(:to_ary) Array.new(a) end it "raises a TypeError if an Array type argument and a default object" do -> { Array.new([1, 2], 1) }.should raise_error(TypeError) end end describe "Array.new with (size, object=nil)" do it "returns an array of size filled with object" do obj = [3] a = Array.new(2, obj) a.should == [obj, obj] a[0].should equal(obj) a[1].should equal(obj) Array.new(3, 14).should == [14, 14, 14] end it "returns an array of size filled with nil when object is omitted" do Array.new(3).should == [nil, nil, nil] end it "raises an ArgumentError if size is negative" do -> { Array.new(-1, :a) }.should raise_error(ArgumentError) -> { Array.new(-1) }.should raise_error(ArgumentError) end it "raises an ArgumentError if size is too large" do -> { Array.new(fixnum_max+1) }.should raise_error(ArgumentError) end it "calls #to_int to convert the size argument to an Integer when object is given" do obj = mock('1') obj.should_receive(:to_int).and_return(1) Array.new(obj, :a).should == [:a] end it "calls #to_int to convert the size argument to an Integer when object is not given" do obj = mock('1') obj.should_receive(:to_int).and_return(1) Array.new(obj).should == [nil] end it "raises a TypeError if the size argument is not an Integer type" do obj = mock('nonnumeric') obj.stub!(:to_ary).and_return([1, 2]) ->{ Array.new(obj, :a) }.should raise_error(TypeError) end it "yields the index of the element and sets the element to the value of the block" do Array.new(3) { |i| i.to_s }.should == ['0', '1', '2'] end it "uses the block value instead of using the default value" do -> { @result = Array.new(3, :obj) { |i| i.to_s } }.should complain(/block supersedes default value argument/) @result.should == ['0', '1', '2'] end it "returns the value passed to break" do a = Array.new(3) do |i| break if i == 2 i.to_s end a.should == nil end end