1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/core/array/shared/join.rb b/spec/ruby/core/array/shared/join.rb
new file mode 100644
index 0000000000..93d5329ee3
--- /dev/null
+++ b/spec/ruby/core/array/shared/join.rb
@@ -0,0 +1,15 @@
+require_relative '../fixtures/classes'
+require_relative '../fixtures/encoded_strings'
+
+describe :array_join_with_string_separator, shared: true do
+  it "returns a string formed by concatenating each element.to_str separated by separator" do
+    obj = mock('foo')
+    obj.should_receive(:to_str).and_return("foo")
+    [1, 2, 3, 4, obj].send(@method, ' | ').should == '1 | 2 | 3 | 4 | foo'
+  end
+
+  it "uses the same separator with nested arrays" do
+    [1, [2, [3, 4], 5], 6].send(@method, ":").should == "1:2:3:4:5:6"
+    [1, [2, ArraySpecs::MyArray[3, 4], 5], 6].send(@method, ":").should == "1:2:3:4:5:6"
+  end
+end