1 files changed, 60 insertions, 0 deletions
diff --git a/spec/ruby/core/range/shared/cover.rb b/spec/ruby/core/range/shared/cover.rb
index b2de86531d..7d2367d712 100644
--- a/spec/ruby/core/range/shared/cover.rb
+++ b/spec/ruby/core/range/shared/cover.rb
@@ -90,4 +90,64 @@ describe :range_cover, shared: true do
       end
     end
   end
+
+  ruby_version_is "2.6" do
+    context "range argument" do
+      it "accepts range argument" do
+        (0..10).send(@method, (3..7)).should be_true
+        (0..10).send(@method, (3..15)).should be_false
+        (0..10).send(@method, (-2..7)).should be_false
+
+        (1.1..7.9).send(@method, (2.5..6.5)).should be_true
+        (1.1..7.9).send(@method, (2.5..8.5)).should be_false
+        (1.1..7.9).send(@method, (0.5..6.5)).should be_false
+
+        ('c'..'i').send(@method, ('d'..'f')).should be_true
+        ('c'..'i').send(@method, ('d'..'z')).should be_false
+        ('c'..'i').send(@method, ('a'..'f')).should be_false
+
+        range_10_100 = RangeSpecs::TenfoldSucc.new(10)..RangeSpecs::TenfoldSucc.new(100)
+        range_20_90 = RangeSpecs::TenfoldSucc.new(20)..RangeSpecs::TenfoldSucc.new(90)
+        range_20_110 = RangeSpecs::TenfoldSucc.new(20)..RangeSpecs::TenfoldSucc.new(110)
+        range_0_90 = RangeSpecs::TenfoldSucc.new(0)..RangeSpecs::TenfoldSucc.new(90)
+
+        range_10_100.send(@method, range_20_90).should be_true
+        range_10_100.send(@method, range_20_110).should be_false
+        range_10_100.send(@method, range_0_90).should be_false
+      end
+
+      it "supports boundaries of different comparable types" do
+        (0..10).send(@method, (3.1..7.9)).should be_true
+        (0..10).send(@method, (3.1..15.9)).should be_false
+        (0..10).send(@method, (-2.1..7.9)).should be_false
+      end
+
+      it "returns false if types are not comparable" do
+        (0..10).send(@method, ('a'..'z')).should be_false
+        (0..10).send(@method, (RangeSpecs::TenfoldSucc.new(0)..RangeSpecs::TenfoldSucc.new(100))).should be_false
+      end
+
+      it "honors exclusion of right boundary (:exclude_end option)" do
+        # Integer
+        (0..10).send(@method, (0..10)).should be_true
+        (0...10).send(@method, (0...10)).should be_true
+
+        (0..10).send(@method, (0...10)).should be_true
+        (0...10).send(@method, (0..10)).should be_false
+
+        (0...11).send(@method, (0..10)).should be_true
+        (0..10).send(@method, (0...11)).should be_true
+
+        # Float
+        (0..10.1).send(@method, (0..10.1)).should be_true
+        (0...10.1).send(@method, (0...10.1)).should be_true
+
+        (0..10.1).send(@method, (0...10.1)).should be_true
+        (0...10.1).send(@method, (0..10.1)).should be_false
+
+        (0...11.1).send(@method, (0..10.1)).should be_true
+        (0..10.1).send(@method, (0...11.1)).should be_false
+      end
+    end
+  end
 end