diff options
Diffstat (limited to 'spec/ruby/core/enumerable/to_h_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/to_h_spec.rb | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/spec/ruby/core/enumerable/to_h_spec.rb b/spec/ruby/core/enumerable/to_h_spec.rb index 966325c736..f15ced122e 100644 --- a/spec/ruby/core/enumerable/to_h_spec.rb +++ b/spec/ruby/core/enumerable/to_h_spec.rb @@ -45,10 +45,46 @@ describe "Enumerable#to_h" do end ruby_version_is "2.6" do - it "converts [key, value] pairs returned by the block to a hash" do - enum = EnumerableSpecs::EachDefiner.new(:a, :b) - i = 0 - enum.to_h {|k| [k, i += 1]}.should == { a: 1, b: 2 } + context "with block" do + before do + @enum = EnumerableSpecs::EachDefiner.new(:a, :b) + end + + it "converts [key, value] pairs returned by the block to a hash" do + @enum.to_h { |k| [k, k.to_s] }.should == { a: 'a', b: 'b' } + end + + it "raises ArgumentError if block returns longer or shorter array" do + -> do + @enum.to_h { |k| [k, k.to_s, 1] } + end.should raise_error(ArgumentError, /element has wrong array length/) + + -> do + @enum.to_h { |k| [k] } + end.should raise_error(ArgumentError, /element has wrong array length/) + end + + it "raises TypeError if block returns something other than Array" do + -> do + @enum.to_h { |k| "not-array" } + end.should raise_error(TypeError, /wrong element type String/) + end + + it "coerces returned pair to Array with #to_ary" do + x = mock('x') + x.stub!(:to_ary).and_return([:b, 'b']) + + @enum.to_h { |k| x }.should == { :b => 'b' } + end + + it "does not coerce returned pair to Array with #to_a" do + x = mock('x') + x.stub!(:to_a).and_return([:b, 'b']) + + -> do + @enum.to_h { |k| x } + end.should raise_error(TypeError, /wrong element type MockObject/) + end end end end |