1 files changed, 43 insertions, 0 deletions
diff --git a/spec/ruby/core/struct/to_s_spec.rb b/spec/ruby/core/struct/to_s_spec.rb
new file mode 100644
index 0000000000..9648b8af9b
--- /dev/null
+++ b/spec/ruby/core/struct/to_s_spec.rb
@@ -0,0 +1,43 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Struct#to_s" do
+  it "returns a string representation showing members and values" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+    car.to_s.should == '#<struct StructClasses::Car make="Ford", model="Ranger", year=nil>'
+  end
+
+  it "returns a string representation without the class name for anonymous structs" do
+    Struct.new(:a).new("").to_s.should == '#<struct a="">'
+  end
+
+  it "returns a string representation without the class name for structs nested in anonymous classes" do
+    c = Class.new
+    c.class_eval <<~DOC
+      class Foo < Struct.new(:a); end
+    DOC
+
+    c::Foo.new("").to_s.should == '#<struct a="">'
+  end
+
+  it "returns a string representation without the class name for structs nested in anonymous modules" do
+    m = Module.new
+    m.module_eval <<~DOC
+      class Foo < Struct.new(:a); end
+    DOC
+
+    m::Foo.new("").to_s.should == '#<struct a="">'
+  end
+
+  it "does not call #name method" do
+    struct = StructClasses::StructWithOverriddenName.new("")
+    struct.to_s.should == '#<struct StructClasses::StructWithOverriddenName a="">'
+  end
+
+  it "does not call #name method when struct is anonymous" do
+    struct = Struct.new(:a)
+    def struct.name; "A"; end
+
+    struct.new("").to_s.should == '#<struct a="">'
+  end
+end