diff options
Diffstat (limited to 'spec/rubyspec/core/enumerable/take_while_spec.rb')
-rw-r--r-- | spec/rubyspec/core/enumerable/take_while_spec.rb | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/spec/rubyspec/core/enumerable/take_while_spec.rb b/spec/rubyspec/core/enumerable/take_while_spec.rb new file mode 100644 index 0000000000..990d16209a --- /dev/null +++ b/spec/rubyspec/core/enumerable/take_while_spec.rb @@ -0,0 +1,51 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/enumerable_enumeratorized', __FILE__) + +describe "Enumerable#take_while" do + before :each do + @enum = EnumerableSpecs::Numerous.new(3, 2, 1, :go) + end + + it "returns an Enumerator if no block given" do + @enum.take_while.should be_an_instance_of(Enumerator) + end + + it "returns no/all elements for {true/false} block" do + @enum.take_while{true}.should == @enum.to_a + @enum.take_while{false}.should == [] + end + + it "accepts returns other than true/false" do + @enum.take_while{1}.should == @enum.to_a + @enum.take_while{nil}.should == [] + end + + it "passes elements to the block until the first false" do + a = [] + @enum.take_while{|obj| (a << obj).size < 3}.should == [3, 2] + a.should == [3, 2, 1] + end + + it "will only go through what's needed" do + enum = EnumerableSpecs::EachCounter.new(4, 3, 2, 1, :stop) + enum.take_while { |x| + break 42 if x == 3 + true + }.should == 42 + enum.times_yielded.should == 2 + end + + it "doesn't return self when it could" do + a = [1,2,3] + a.take_while{true}.should_not equal(a) + end + + it "calls the block with initial args when yielded with multiple arguments" do + yields = [] + EnumerableSpecs::YieldsMixed.new.take_while{ |v| yields << v } + yields.should == [1, [2], 3, 5, [8, 9], nil, []] + end + + it_behaves_like :enumerable_enumeratorized_with_unknown_size, :take_while +end |