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Diffstat (limited to 'spec/ruby/core/array/cycle_spec.rb')
-rw-r--r-- | spec/ruby/core/array/cycle_spec.rb | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/spec/ruby/core/array/cycle_spec.rb b/spec/ruby/core/array/cycle_spec.rb new file mode 100644 index 0000000000..2e60798c8c --- /dev/null +++ b/spec/ruby/core/array/cycle_spec.rb @@ -0,0 +1,101 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__) + +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 and passed value is an integer" do + [].cycle(6, &@prc).should be_nil + ScratchPad.recorded.should == [] + end + + it "does not yield and returns nil when the array is empty and passed value is nil" do + [].cycle(nil, &@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 + + before :all do + @object = [1, 2, 3, 4] + @empty_object = [] + end + it_should_behave_like :enumeratorized_with_cycle_size +end |