1 files changed, 41 insertions, 9 deletions
diff --git a/spec/ruby/core/range/new_spec.rb b/spec/ruby/core/range/new_spec.rb
index 26ea12867d..9a35f28c7e 100644
--- a/spec/ruby/core/range/new_spec.rb
+++ b/spec/ruby/core/range/new_spec.rb
@@ -25,21 +25,53 @@ describe "Range.new" do
   end
 
   it "raises an ArgumentError when the given start and end can't be compared by using #<=>" do
-    lambda { Range.new(1, mock('x'))         }.should raise_error(ArgumentError)
-    lambda { Range.new(mock('x'), mock('y')) }.should raise_error(ArgumentError)
+    -> { Range.new(1, mock('x'))         }.should.raise(ArgumentError)
+    -> { Range.new(mock('x'), mock('y')) }.should.raise(ArgumentError)
 
     b = mock('x')
     (a = mock('nil')).should_receive(:<=>).with(b).and_return(nil)
-    lambda { Range.new(a, b) }.should raise_error(ArgumentError)
+    -> { Range.new(a, b) }.should.raise(ArgumentError)
   end
 
-  ruby_version_is "2.5" do
-    it "does not rescue exception raised in #<=> when compares the given start and end" do
-      b = mock('a')
-      a = mock('b')
-      a.should_receive(:<=>).with(b).and_raise(RangeSpecs::ComparisonError)
+  it "does not rescue exception raised in #<=> when compares the given start and end" do
+    b = mock('a')
+    a = mock('b')
+    a.should_receive(:<=>).with(b).and_raise(RangeSpecs::ComparisonError)
 
-      -> { Range.new(a, b) }.should raise_error(RangeSpecs::ComparisonError)
+    -> { Range.new(a, b) }.should.raise(RangeSpecs::ComparisonError)
+  end
+
+  describe "beginless/endless range" do
+    it "allows beginless left boundary" do
+      range = Range.new(nil, 1)
+      range.begin.should == nil
+    end
+
+    it "distinguishes ranges with included and excluded right boundary" do
+      range_exclude = Range.new(nil, 1, true)
+      range_include = Range.new(nil, 1, false)
+
+      range_exclude.should_not == range_include
+    end
+
+    it "allows endless right boundary" do
+      range = Range.new(1, nil)
+      range.end.should == nil
+    end
+
+    it "distinguishes ranges with included and excluded right boundary" do
+      range_exclude = Range.new(1, nil, true)
+      range_include = Range.new(1, nil, false)
+
+      range_exclude.should_not == range_include
+    end
+
+    it "creates a frozen range if the class is Range.class" do
+      Range.new(1, 2).should.frozen?
+    end
+
+    it "does not create a frozen range if the class is not Range.class" do
+      Class.new(Range).new(1, 2).should_not.frozen?
     end
   end
 end