1 files changed, 19 insertions, 0 deletions
diff --git a/spec/ruby/core/range/max_spec.rb b/spec/ruby/core/range/max_spec.rb
index 728053cefd..f2672170d9 100644
--- a/spec/ruby/core/range/max_spec.rb
+++ b/spec/ruby/core/range/max_spec.rb
@@ -51,6 +51,19 @@ describe "Range#max" do
       -> { eval("(1..)").max }.should raise_error(RangeError)
     end
   end
+
+  ruby_version_is "3.0" do
+    it "returns the end point for beginless ranges" do
+      eval("(..1)").max.should == 1
+      eval("(..1.0)").max.should == 1.0
+    end
+
+    it "raises for an exclusive beginless range" do
+      -> {
+        eval("(...1)").max
+      }.should raise_error(TypeError, 'cannot exclude end value with non Integer begin value')
+    end
+  end
 end
 
 describe "Range#max given a block" do
@@ -85,4 +98,10 @@ describe "Range#max given a block" do
     ('z'..'l').max {|x,y| x <=> y}.should be_nil
     (5...5).max {|x,y| x <=> y}.should be_nil
   end
+
+  ruby_version_is "2.7" do
+    it "raises RangeError when called with custom comparison method on an beginless range" do
+      -> { eval("(..1)").max {|a, b| a} }.should raise_error(RangeError)
+    end
+  end
 end