1 files changed, 19 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/arithmetic_sequence/size_spec.rb b/spec/ruby/core/enumerator/arithmetic_sequence/size_spec.rb
new file mode 100644
index 0000000000..00403b0238
--- /dev/null
+++ b/spec/ruby/core/enumerator/arithmetic_sequence/size_spec.rb
@@ -0,0 +1,19 @@
+require_relative '../../../spec_helper'
+
+ruby_version_is "2.6" do
+  describe "Enumerator::ArithmeticSequence#size" do
+    context "for finite sequence" do
+      it "returns the number of elements in this arithmetic sequence" do
+        1.step(10).size.should == 10
+        (1...10).step.size.should == 9
+      end
+    end
+
+    context "for infinite sequence" do
+      it "returns Infinity" do
+        1.step(Float::INFINITY).size.should == Float::INFINITY
+        (1..Float::INFINITY).step.size.should == Float::INFINITY
+      end
+    end
+  end
+end