1 files changed, 35 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/plus_spec.rb b/spec/ruby/core/enumerator/plus_spec.rb
new file mode 100644
index 0000000000..c9bae08b04
--- /dev/null
+++ b/spec/ruby/core/enumerator/plus_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "2.6" do
+  describe "Enumerator#+" do
+    before :each do
+      ScratchPad.record []
+    end
+
+    it "returns a chain of self and provided enumerators" do
+      one   = Enumerator.new { |y| y << 1 }
+      two   = Enumerator.new { |y| y << 2 }
+      three = Enumerator.new { |y| y << 3 }
+
+      chain = one + two + three
+
+      chain.should be_an_instance_of(Enumerator::Chain)
+      chain.each { |item| ScratchPad << item }
+      ScratchPad.recorded.should == [1, 2, 3]
+    end
+
+    it "calls #each on each argument" do
+      enum = Enumerator.new { |y| y << "one" }
+
+      obj1 = mock("obj1")
+      obj1.should_receive(:each).once.and_yield("two")
+
+      obj2 = mock("obj2")
+      obj2.should_receive(:each).once.and_yield("three")
+
+      chain = enum + obj1 + obj2
+      chain.each { |item| ScratchPad << item }
+      ScratchPad.recorded.should == ["one", "two", "three"]
+    end
+  end
+end