1 files changed, 18 insertions, 1 deletions
diff --git a/spec/ruby/core/range/to_a_spec.rb b/spec/ruby/core/range/to_a_spec.rb
index 15f0b44a9c..6221ae5f71 100644
--- a/spec/ruby/core/range/to_a_spec.rb
+++ b/spec/ruby/core/range/to_a_spec.rb
@@ -6,7 +6,7 @@ describe "Range#to_a" do
     ('A'..'D').to_a.should == ['A','B','C','D']
     ('A'...'D').to_a.should == ['A','B','C']
     (0xfffd...0xffff).to_a.should == [0xfffd,0xfffe]
-    -> { (0.5..2.4).to_a }.should raise_error(TypeError)
+    -> { (0.5..2.4).to_a }.should.raise(TypeError)
   end
 
   it "returns empty array for descending-ordered" do
@@ -16,7 +16,24 @@ describe "Range#to_a" do
     (0xffff...0xfffd).to_a.should == []
   end
 
+  it "works with Ranges of 64-bit integers" do
+    large = 1 << 40
+    (large..large+1).to_a.should == [1099511627776, 1099511627777]
+  end
+
   it "works with Ranges of Symbols" do
     (:A..:z).to_a.size.should == 58
   end
+
+  it "works for non-ASCII ranges" do
+    ('Σ'..'Ω').to_a.should == ["Σ", "Τ", "Υ", "Φ", "Χ", "Ψ", "Ω"]
+  end
+
+  it "throws an exception for endless ranges" do
+    -> { eval("(1..)").to_a }.should.raise(RangeError)
+  end
+
+  it "throws an exception for beginless ranges" do
+    -> { (..1).to_a }.should.raise(TypeError)
+  end
 end