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Diffstat (limited to 'spec/ruby/core/enumerable/count_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/count_spec.rb | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/count_spec.rb b/spec/ruby/core/enumerable/count_spec.rb new file mode 100644 index 0000000000..9d1e08f3a9 --- /dev/null +++ b/spec/ruby/core/enumerable/count_spec.rb @@ -0,0 +1,59 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Enumerable#count" do + before :each do + @elements = [1, 2, 4, 2] + @numerous = EnumerableSpecs::Numerous.new(*@elements) + end + + describe "when no argument or a block" do + it "returns size" do + @numerous.count.should == 4 + end + + describe "with a custom size method" do + before :each do + class << @numerous + def size + :any_object + end + end + end + + it "ignores the custom size method" do + @numerous.count.should == 4 + end + end + end + + it "counts nils if given nil as an argument" do + EnumerableSpecs::Numerous.new(nil, nil, nil, false).count(nil).should == 3 + end + + it "accepts an argument for comparison using ==" do + @numerous.count(2).should == 2 + end + + it "uses a block for comparison" do + @numerous.count{|x| x%2==0 }.should == 3 + end + + it "ignores the block when given an argument" do + -> { + @numerous.count(4){|x| x%2==0 }.should == 1 + }.should complain(/given block not used/) + end + + describe "when each yields multiple values" do + it "gathers initial args as elements" do + multi = EnumerableSpecs::YieldsMulti.new + multi.count {|e| e == 1 }.should == 1 + end + + it "accepts an argument for comparison using ==" do + multi = EnumerableSpecs::YieldsMulti.new + multi.count([1, 2]).should == 1 + end + end +end |