Update to ruby/spec@35a9fba

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/enumerable/chain_spec.rb

@@ -0,0 +1,22 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+ruby_version_is "2.6" do
+  describe "Enumerable#chain" do
+    before :each do
+      ScratchPad.record []
+    end
+
+    it "returns a chain of self and provided enumerables" do
+      one = EnumerableSpecs::Numerous.new(1)
+      two = EnumerableSpecs::Numerous.new(2)
+      three = EnumerableSpecs::Numerous.new(3)
+
+      chain = one.chain(two, three)
+
+      chain.should be_an_instance_of(Enumerator::Chain)
+      chain.each { |item| ScratchPad << item }
+      ScratchPad.recorded.should == [1, 2, 3]
+    end
+  end
+end