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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 | a3736e97a6ca517c2cd7d3d93a8f2ef86e39e5b5 (patch) | |
tree | 9eef7f720314ebaff56845a74e203770e62284e4 /spec/rubyspec/core/array/unshift_spec.rb | |
parent | 52df1d0d3370919711c0577aaa42d1a864709885 (diff) | |
download | ruby-a3736e97a6ca517c2cd7d3d93a8f2ef86e39e5b5.tar.gz |
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/array/unshift_spec.rb')
-rw-r--r-- | spec/rubyspec/core/array/unshift_spec.rb | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/spec/rubyspec/core/array/unshift_spec.rb b/spec/rubyspec/core/array/unshift_spec.rb new file mode 100644 index 0000000000..9467a1a6df --- /dev/null +++ b/spec/rubyspec/core/array/unshift_spec.rb @@ -0,0 +1,50 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Array#unshift" do + it "prepends object to the original array" do + a = [1, 2, 3] + a.unshift("a").should equal(a) + a.should == ['a', 1, 2, 3] + a.unshift().should equal(a) + a.should == ['a', 1, 2, 3] + a.unshift(5, 4, 3) + a.should == [5, 4, 3, 'a', 1, 2, 3] + + # shift all but one element + a = [1, 2] + a.shift + a.unshift(3, 4) + a.should == [3, 4, 2] + + # now shift all elements + a.shift + a.shift + a.shift + a.unshift(3, 4) + a.should == [3, 4] + end + + it "quietly ignores unshifting nothing" do + [].unshift().should == [] + [].unshift(*[]).should == [] + end + + it "properly handles recursive arrays" do + empty = ArraySpecs.empty_recursive_array + empty.unshift(:new).should == [:new, empty] + + array = ArraySpecs.recursive_array + array.unshift(:new) + array[0..5].should == [:new, 1, 'two', 3.0, array, array] + end + + it "raises a RuntimeError on a frozen array when the array is modified" do + lambda { ArraySpecs.frozen_array.unshift(1) }.should raise_error(RuntimeError) + end + + # see [ruby-core:23666] + it "raises a RuntimeError on a frozen array when the array would not be modified" do + lambda { ArraySpecs.frozen_array.unshift }.should raise_error(RuntimeError) + end +end |