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ruby_version_is '1.8.7' do
describe "Array#cycle" do
before :each do
ScratchPad.record []
@array = [1, 2, 3]
@prc = lambda { |x| ScratchPad << x }
end
it "does not yield and returns nil when the array is empty" do
[].cycle(6, &@prc).should be_nil
ScratchPad.recorded.should == []
end
it "does not yield and returns nil when passed 0" do
@array.cycle(0, &@prc).should be_nil
ScratchPad.recorded.should == []
end
it "iterates the array 'count' times yielding each item to the block" do
@array.cycle(2, &@prc)
ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
end
it "iterates indefinitely when not passed a count" do
@array.cycle do |x|
ScratchPad << x
break if ScratchPad.recorded.size > 7
end
ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3, 1, 2]
end
it "iterates indefinitely when passed nil" do
@array.cycle(nil) do |x|
ScratchPad << x
break if ScratchPad.recorded.size > 7
end
ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3, 1, 2]
end
it "does not rescue StopIteration when not passed a count" do
lambda do
@array.cycle { raise StopIteration }
end.should raise_error(StopIteration)
end
it "does not rescue StopIteration when passed a count" do
lambda do
@array.cycle(3) { raise StopIteration }
end.should raise_error(StopIteration)
end
it "iterates the array Integer(count) times when passed a Float count" do
@array.cycle(2.7, &@prc)
ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
end
it "calls #to_int to convert count to an Integer" do
count = mock("cycle count 2")
count.should_receive(:to_int).and_return(2)
@array.cycle(count, &@prc)
ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
end
it "raises a TypeError if #to_int does not return an Integer" do
count = mock("cycle count 2")
count.should_receive(:to_int).and_return("2")
lambda { @array.cycle(count, &@prc) }.should raise_error(TypeError)
end
it "raises a TypeError if passed a String" do
lambda { @array.cycle("4") { } }.should raise_error(TypeError)
end
it "raises a TypeError if passed an Object" do
lambda { @array.cycle(mock("cycle count")) { } }.should raise_error(TypeError)
end
it "raises a TypeError if passed true" do
lambda { @array.cycle(true) { } }.should raise_error(TypeError)
end
it "raises a TypeError if passed false" do
lambda { @array.cycle(false) { } }.should raise_error(TypeError)
end
end
end
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