diff options
Diffstat (limited to 'spec/ruby/core/range/size_spec.rb')
-rw-r--r-- | spec/ruby/core/range/size_spec.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/spec/ruby/core/range/size_spec.rb b/spec/ruby/core/range/size_spec.rb new file mode 100644 index 0000000000..ecf0ecf606 --- /dev/null +++ b/spec/ruby/core/range/size_spec.rb @@ -0,0 +1,31 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Range#size" do + it "returns the number of elements in the range" do + (1..16).size.should == 16 + (1...16).size.should == 15 + + (1.0..16.0).size.should == 16 + (1.0...16.0).size.should == 15 + (1.0..15.9).size.should == 15 + (1.1..16.0).size.should == 15 + (1.1..15.9).size.should == 15 + end + + it "returns 0 if last is less than first" do + (16..0).size.should == 0 + (16.0..0.0).size.should == 0 + (Float::INFINITY..0).size.should == 0 + end + + it 'returns Float::INFINITY for increasing, infinite ranges' do + (0..Float::INFINITY).size.should == Float::INFINITY + (-Float::INFINITY..0).size.should == Float::INFINITY + (-Float::INFINITY..Float::INFINITY).size.should == Float::INFINITY + end + + it "returns nil if first and last are not Numeric" do + (:a..:z).size.should be_nil + ('a'..'z').size.should be_nil + end +end |