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/hash/keep_if_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/hash/keep_if_spec.rb')
-rw-r--r-- | spec/rubyspec/core/hash/keep_if_spec.rb | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/spec/rubyspec/core/hash/keep_if_spec.rb b/spec/rubyspec/core/hash/keep_if_spec.rb new file mode 100644 index 0000000000..6b3a1925d3 --- /dev/null +++ b/spec/rubyspec/core/hash/keep_if_spec.rb @@ -0,0 +1,37 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/iteration', __FILE__) +require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__) + +describe "Hash#keep_if" do + it "yields two arguments: key and value" do + all_args = [] + { 1 => 2, 3 => 4 }.keep_if { |*args| all_args << args } + all_args.should == [[1, 2], [3, 4]] + end + + it "keeps every entry for which block is true and returns self" do + h = { a: 1, b: 2, c: 3, d: 4 } + h.keep_if { |k,v| v % 2 == 0 }.should equal(h) + h.should == { b: 2, d: 4 } + end + + it "removes all entries if the block is false" do + h = { a: 1, b: 2, c: 3 } + h.keep_if { |k,v| false }.should equal(h) + h.should == {} + end + + it "returns self even if unmodified" do + h = { 1 => 2, 3 => 4 } + h.keep_if { true }.should equal(h) + end + + it "raises a RuntimeError if called on a frozen instance" do + lambda { HashSpecs.frozen_hash.keep_if { true } }.should raise_error(RuntimeError) + lambda { HashSpecs.empty_frozen_hash.keep_if { false } }.should raise_error(RuntimeError) + end + + it_behaves_like(:hash_iteration_no_block, :keep_if) + it_behaves_like(:enumeratorized_with_origin_size, :keep_if, { 1 => 2, 3 => 4, 5 => 6 }) +end |