1 files changed, 31 insertions, 0 deletions
diff --git a/spec/rubyspec/core/range/size_spec.rb b/spec/rubyspec/core/range/size_spec.rb
new file mode 100644
index 0000000000..ecf0ecf606
--- /dev/null
+++ b/spec/rubyspec/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