diff options
author | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-07 12:04:49 +0000 |
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committer | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-07 12:04:49 +0000 |
commit | 95e8c48dd3348503a8c7db5d0498894a1b676395 (patch) | |
tree | 9eef7f720314ebaff56845a74e203770e62284e4 /spec/rubyspec/core/enumerator/peek_spec.rb | |
parent | ed7d803500de38186c74bce94d233e85ef51e503 (diff) |
Add in-tree mspec and ruby/spec
* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
These files can therefore be updated like any other file in MRI.
Instructions are provided in spec/README.
[Feature #13156] [ruby-core:79246]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/rubyspec/core/enumerator/peek_spec.rb')
-rw-r--r-- | spec/rubyspec/core/enumerator/peek_spec.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/spec/rubyspec/core/enumerator/peek_spec.rb b/spec/rubyspec/core/enumerator/peek_spec.rb new file mode 100644 index 0000000000..26ac85161b --- /dev/null +++ b/spec/rubyspec/core/enumerator/peek_spec.rb @@ -0,0 +1,36 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Enumerator#peek" do + before :each do + @e = (1..5).to_a.to_enum + end + + it "returns the next element in self" do + @e.peek.should == 1 + end + + it "does not advance the position of the current element" do + @e.next.should == 1 + @e.peek.should == 2 + @e.next.should == 2 + end + + it "can be called repeatedly without advancing the position of the current element" do + @e.peek + @e.peek + @e.peek.should == 1 + @e.next.should == 1 + end + + it "works in concert with #rewind" do + @e.next + @e.next + @e.rewind + @e.peek.should == 1 + end + + it "raises StopIteration if called on a finished enumerator" do + 5.times { @e.next } + lambda { @e.peek }.should raise_error(StopIteration) + end +end |