4 files changed, 61 insertions, 0 deletions
diff --git a/spec/ruby/core/range/shared/cover.rb b/spec/ruby/core/range/shared/cover.rb
index 5b09cea4e0..e04682ba71 100644
--- a/spec/ruby/core/range/shared/cover.rb
+++ b/spec/ruby/core/range/shared/cover.rb
@@ -152,4 +152,46 @@ describe :range_cover_subrange, shared: true do
       end
     end
   end
+
+  ruby_version_is "2.7" do
+    it "allows self to be a beginless range" do
+      eval("(...10)").send(@method, (3..7)).should be_true
+      eval("(...10)").send(@method, (3..15)).should be_false
+
+      eval("(..7.9)").send(@method, (2.5..6.5)).should be_true
+      eval("(..7.9)").send(@method, (2.5..8.5)).should be_false
+
+      eval("(..'i')").send(@method, ('d'..'f')).should be_true
+      eval("(..'i')").send(@method, ('d'..'z')).should be_false
+    end
+
+    it "allows self to be a endless range" do
+      eval("(0...)").send(@method, (3..7)).should be_true
+      eval("(5...)").send(@method, (3..15)).should be_false
+
+      eval("(1.1..)").send(@method, (2.5..6.5)).should be_true
+      eval("(3.3..)").send(@method, (2.5..8.5)).should be_false
+
+      eval("('a'..)").send(@method, ('d'..'f')).should be_true
+      eval("('p'..)").send(@method, ('d'..'z')).should be_false
+    end
+
+    it "accepts beginless range argument" do
+      eval("(..10)").send(@method, eval("(...10)")).should be_true
+      (0..10).send(@method, eval("(...10)")).should be_false
+
+      (1.1..7.9).send(@method, eval("(...10.5)")).should be_false
+
+      ('c'..'i').send(@method, eval("(..'i')")).should be_false
+    end
+
+    it "accepts endless range argument" do
+      eval("(0..)").send(@method, eval("(0...)")).should be_true
+      (0..10).send(@method, eval("(0...)")).should be_false
+
+      (1.1..7.9).send(@method, eval("(0.8...)")).should be_false
+
+      ('c'..'i').send(@method, eval("('a'..)")).should be_false
+    end
+  end
 end
diff --git a/spec/ruby/core/range/shared/cover_and_include.rb b/spec/ruby/core/range/shared/cover_and_include.rb
index b308524310..0267e3ccb0 100644
--- a/spec/ruby/core/range/shared/cover_and_include.rb
+++ b/spec/ruby/core/range/shared/cover_and_include.rb
@@ -26,6 +26,13 @@ describe :range_cover_and_include, shared: true do
     end
   end
 
+  ruby_version_is "2.7" do
+    it "returns true if other is an element of self for beginless ranges" do
+      eval("(..10)").send(@method, 2.4).should == true
+      eval("(...10.5)").send(@method, 2.4).should == true
+    end
+  end
+
   it "compares values using <=>" do
     rng = (1..5)
     m = mock("int")
diff --git a/spec/ruby/core/range/to_a_spec.rb b/spec/ruby/core/range/to_a_spec.rb
index 08f50e4d9e..9a1352b7b0 100644
--- a/spec/ruby/core/range/to_a_spec.rb
+++ b/spec/ruby/core/range/to_a_spec.rb
@@ -16,6 +16,11 @@ 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
diff --git a/spec/ruby/core/range/to_s_spec.rb b/spec/ruby/core/range/to_s_spec.rb
index ccbc5d8e7e..59672da822 100644
--- a/spec/ruby/core/range/to_s_spec.rb
+++ b/spec/ruby/core/range/to_s_spec.rb
@@ -18,6 +18,13 @@ describe "Range#to_s" do
     end
   end
 
+  ruby_version_is "2.7" do
+    it "can show beginless ranges" do
+      eval("(..1)").to_s.should == "..1"
+      eval("(...1.0)").to_s.should == "...1.0"
+    end
+  end
+
   ruby_version_is ''...'2.7' do
     it "returns a tainted string if either end is tainted" do
       (("a".taint)..."c").to_s.tainted?.should be_true