diff options
Diffstat (limited to 'spec/rubyspec/shared/enumerator/next.rb')
-rw-r--r-- | spec/rubyspec/shared/enumerator/next.rb | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/spec/rubyspec/shared/enumerator/next.rb b/spec/rubyspec/shared/enumerator/next.rb new file mode 100644 index 0000000000..d8ae6d9673 --- /dev/null +++ b/spec/rubyspec/shared/enumerator/next.rb @@ -0,0 +1,28 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe :enum_next, shared: true do + + before :each do + @enum = 1.upto(3) + end + + it "returns the next element of the enumeration" do + @enum.next.should == 1 + @enum.next.should == 2 + @enum.next.should == 3 + end + + it "raises a StopIteration exception at the end of the stream" do + 3.times { @enum.next } + lambda { @enum.next }.should raise_error(StopIteration) + end + + it "cannot be called again until the enumerator is rewound" do + 3.times { @enum.next } + lambda { @enum.next }.should raise_error(StopIteration) + lambda { @enum.next }.should raise_error(StopIteration) + lambda { @enum.next }.should raise_error(StopIteration) + @enum.rewind + @enum.next.should == 1 + end +end |