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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/join'
describe "Array#*" do
it "tries to convert the passed argument to a String using #to_str" do
obj = mock('separator')
obj.should_receive(:to_str).and_return('::')
([1, 2, 3, 4] * obj).should == '1::2::3::4'
end
it "tires to convert the passed argument to an Integer using #to_int" do
obj = mock('count')
obj.should_receive(:to_int).and_return(2)
([1, 2, 3, 4] * obj).should == [1, 2, 3, 4, 1, 2, 3, 4]
end
it "raises a TypeError if the argument can neither be converted to a string nor an integer" do
obj = mock('not a string or integer')
->{ [1,2] * obj }.should raise_error(TypeError)
end
it "converts the passed argument to a String rather than an Integer" do
obj = mock('2')
def obj.to_int() 2 end
def obj.to_str() "2" end
([:a, :b, :c] * obj).should == "a2b2c"
end
it "raises a TypeError is the passed argument is nil" do
->{ [1,2] * nil }.should raise_error(TypeError)
end
it "raises an ArgumentError when passed 2 or more arguments" do
->{ [1,2].send(:*, 1, 2) }.should raise_error(ArgumentError)
end
it "raises an ArgumentError when passed no arguments" do
->{ [1,2].send(:*) }.should raise_error(ArgumentError)
end
end
describe "Array#* with an integer" do
it "concatenates n copies of the array when passed an integer" do
([ 1, 2, 3 ] * 0).should == []
([ 1, 2, 3 ] * 1).should == [1, 2, 3]
([ 1, 2, 3 ] * 3).should == [1, 2, 3, 1, 2, 3, 1, 2, 3]
([] * 10).should == []
end
it "does not return self even if the passed integer is 1" do
ary = [1, 2, 3]
(ary * 1).should_not equal(ary)
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
(empty * 0).should == []
(empty * 1).should == empty
(empty * 3).should == [empty, empty, empty]
array = ArraySpecs.recursive_array
(array * 0).should == []
(array * 1).should == array
end
it "raises an ArgumentError when passed a negative integer" do
-> { [ 1, 2, 3 ] * -1 }.should raise_error(ArgumentError)
-> { [] * -1 }.should raise_error(ArgumentError)
end
describe "with a subclass of Array" do
before :each do
ScratchPad.clear
@array = ArraySpecs::MyArray[1, 2, 3, 4, 5]
end
it "returns an Array instance" do
(@array * 0).should be_an_instance_of(Array)
(@array * 1).should be_an_instance_of(Array)
(@array * 2).should be_an_instance_of(Array)
end
it "does not call #initialize on the subclass instance" do
(@array * 2).should == [1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
ScratchPad.recorded.should be_nil
end
end
end
describe "Array#* with a string" do
it_behaves_like :array_join_with_string_separator, :*
end
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