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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Array#initialize" do
before :each do
ScratchPad.clear
end
it "is private" do
Array.should have_private_instance_method("initialize")
end
it "is called on subclasses" do
b = ArraySpecs::SubArray.new :size_or_array, :obj
b.should == []
ScratchPad.recorded.should == [:size_or_array, :obj]
end
it "preserves the object's identity even when changing its value" do
a = [1, 2, 3]
a.send(:initialize).should equal(a)
a.should_not == [1, 2, 3]
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
it "raises a FrozenError on frozen arrays" do
-> do
ArraySpecs.frozen_array.send :initialize
end.should raise_error(FrozenError)
-> do
ArraySpecs.frozen_array.send :initialize, ArraySpecs.frozen_array
end.should raise_error(FrozenError)
end
it "calls #to_ary to convert the value to an array, even if it's private" do
a = ArraySpecs::PrivateToAry.new
[].send(:initialize, a).should == [1, 2, 3]
end
end
describe "Array#initialize with no arguments" do
it "makes the array empty" do
[1, 2, 3].send(:initialize).should be_empty
end
it "does not use the given block" do
-> {
-> { [1, 2, 3].send(:initialize) { raise } }.should_not raise_error
}.should complain(/#{__FILE__}:#{__LINE__-1}: warning: given block not used/, verbose: true)
end
end
describe "Array#initialize with (array)" do
it "replaces self with the other array" do
b = [4, 5, 6]
[1, 2, 3].send(:initialize, b).should == b
end
it "does not use the given block" do
->{ [1, 2, 3].send(:initialize) { 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)
[].send(:initialize, 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)
[].send(:initialize, a).should == a
end
it "raises a TypeError if an Array type argument and a default object" do
-> { [].send(:initialize, [1, 2], 1) }.should raise_error(TypeError)
end
end
describe "Array#initialize with (size, object=nil)" do
it "sets the array to size and fills with the object" do
a = []
obj = [3]
a.send(:initialize, 2, obj).should == [obj, obj]
a[0].should equal(obj)
a[1].should equal(obj)
b = []
b.send(:initialize, 3, 14).should == [14, 14, 14]
b.should == [14, 14, 14]
end
it "sets the array to size and fills with nil when object is omitted" do
[].send(:initialize, 3).should == [nil, nil, nil]
end
it "raises an ArgumentError if size is negative" do
-> { [].send(:initialize, -1, :a) }.should raise_error(ArgumentError)
-> { [].send(:initialize, -1) }.should raise_error(ArgumentError)
end
it "raises an ArgumentError if size is too large" do
-> { [].send(:initialize, 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)
[].send(:initialize, 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)
[].send(:initialize, 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])
->{ [].send(:initialize, 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
[].send(:initialize, 3) { |i| i.to_s }.should == ['0', '1', '2']
end
it "uses the block value instead of using the default value" do
-> {
@result = [].send(:initialize, 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
[].send(:initialize, 3) { break :a }.should == :a
end
it "sets the array to the values returned by the block before break is executed" do
a = [1, 2, 3]
a.send(:initialize, 3) do |i|
break if i == 2
i.to_s
end
a.should == ['0', '1']
end
end
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