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Diffstat (limited to 'spec/ruby/core/hash/delete_if_spec.rb')
-rw-r--r-- | spec/ruby/core/hash/delete_if_spec.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/delete_if_spec.rb b/spec/ruby/core/hash/delete_if_spec.rb new file mode 100644 index 0000000000..d739e4fbab --- /dev/null +++ b/spec/ruby/core/hash/delete_if_spec.rb @@ -0,0 +1,44 @@ +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#delete_if" do + it "yields two arguments: key and value" do + all_args = [] + { 1 => 2, 3 => 4 }.delete_if { |*args| all_args << args } + all_args.sort.should == [[1, 2], [3, 4]] + end + + it "removes every entry for which block is true and returns self" do + h = { a: 1, b: 2, c: 3, d: 4 } + h.delete_if { |k,v| v % 2 == 1 }.should equal(h) + h.should == { b: 2, d: 4 } + end + + it "removes all entries if the block is true" do + h = { a: 1, b: 2, c: 3 } + h.delete_if { |k,v| true }.should equal(h) + h.should == {} + end + + it "processes entries with the same order as each()" do + h = { a: 1, b: 2, c: 3, d: 4 } + + each_pairs = [] + delete_pairs = [] + + h.each_pair { |k,v| each_pairs << [k, v] } + h.delete_if { |k,v| delete_pairs << [k,v] } + + each_pairs.should == delete_pairs + end + + it "raises a RuntimeError if called on a frozen instance" do + lambda { HashSpecs.frozen_hash.delete_if { false } }.should raise_error(RuntimeError) + lambda { HashSpecs.empty_frozen_hash.delete_if { true } }.should raise_error(RuntimeError) + end + + it_behaves_like(:hash_iteration_no_block, :delete_if) + it_behaves_like(:enumeratorized_with_origin_size, :delete_if, { 1 => 2, 3 => 4, 5 => 6 }) +end |