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Diffstat (limited to 'spec/ruby/core/enumerable/chunk_while_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/chunk_while_spec.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/chunk_while_spec.rb b/spec/ruby/core/enumerable/chunk_while_spec.rb new file mode 100644 index 0000000000..a5cbdc3348 --- /dev/null +++ b/spec/ruby/core/enumerable/chunk_while_spec.rb @@ -0,0 +1,44 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +ruby_version_is "2.3" do + describe "Enumerable#chunk_while" do + before :each do + ary = [10, 9, 7, 6, 4, 3, 2, 1] + @enum = EnumerableSpecs::Numerous.new(*ary) + @result = @enum.chunk_while { |i, j| i - 1 == j } + @enum_length = ary.length + end + + context "when given a block" do + it "returns an enumerator" do + @result.should be_an_instance_of(Enumerator) + end + + it "splits chunks between adjacent elements i and j where the block returns false" do + @result.to_a.should == [[10, 9], [7, 6], [4, 3, 2, 1]] + end + + it "calls the block for length of the receiver enumerable minus one times" do + times_called = 0 + @enum.chunk_while do |i, j| + times_called += 1 + i - 1 == j + end.to_a + times_called.should == (@enum_length - 1) + end + end + + context "when not given a block" do + it "raises an ArgumentError" do + lambda { @enum.chunk_while }.should raise_error(ArgumentError) + end + end + + context "on a single-element array" do + it "ignores the block and returns an enumerator that yields [element]" do + [1].chunk_while {|x| x.even?}.to_a.should == [[1]] + end + end + end +end |