diff options
Diffstat (limited to 'spec/ruby/core/enumerator/lazy/shared/select.rb')
-rw-r--r-- | spec/ruby/core/enumerator/lazy/shared/select.rb | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/lazy/shared/select.rb b/spec/ruby/core/enumerator/lazy/shared/select.rb new file mode 100644 index 0000000000..546256360e --- /dev/null +++ b/spec/ruby/core/enumerator/lazy/shared/select.rb @@ -0,0 +1,60 @@ +# -*- encoding: us-ascii -*- + +require File.expand_path('../../../../../spec_helper', __FILE__) +require File.expand_path('../../fixtures/classes', __FILE__) + +describe :enumerator_lazy_select, shared: true do + before :each do + @yieldsmixed = EnumeratorLazySpecs::YieldsMixed.new.to_enum.lazy + @eventsmixed = EnumeratorLazySpecs::EventsMixed.new.to_enum.lazy + ScratchPad.record [] + end + + after :each do + ScratchPad.clear + end + + it "returns a new instance of Enumerator::Lazy" do + ret = @yieldsmixed.send(@method) {} + ret.should be_an_instance_of(Enumerator::Lazy) + ret.should_not equal(@yieldsmixed) + end + + it "sets #size to nil" do + Enumerator::Lazy.new(Object.new, 100) {}.send(@method) { true }.size.should == nil + end + + describe "when the returned lazy enumerator is evaluated by Enumerable#first" do + it "stops after specified times" do + (0..Float::INFINITY).lazy.send(@method, &:even?).first(3).should == [0, 2, 4] + + @eventsmixed.send(@method) { true }.first(1) + ScratchPad.recorded.should == [:before_yield] + end + end + + it "calls the block with a gathered array when yield with multiple arguments" do + yields = [] + @yieldsmixed.send(@method) { |v| yields << v }.force + yields.should == EnumeratorLazySpecs::YieldsMixed.gathered_yields + end + + it "raises an ArgumentError when not given a block" do + lambda { @yieldsmixed.send(@method) }.should raise_error(ArgumentError) + end + + describe "on a nested Lazy" do + it "sets #size to nil" do + Enumerator::Lazy.new(Object.new, 100) {}.take(50) {}.send(@method) { true }.size.should == nil + end + + describe "when the returned lazy enumerator is evaluated by Enumerable#first" do + it "stops after specified times" do + (0..Float::INFINITY).lazy.send(@method) { |n| n > 5 }.send(@method, &:even?).first(3).should == [6, 8, 10] + + @eventsmixed.send(@method) { true }.send(@method) { true }.first(1) + ScratchPad.recorded.should == [:before_yield] + end + end + end +end |