1 files changed, 36 insertions, 0 deletions
diff --git a/spec/ruby/core/module/const_missing_spec.rb b/spec/ruby/core/module/const_missing_spec.rb
new file mode 100644
index 0000000000..742218281c
--- /dev/null
+++ b/spec/ruby/core/module/const_missing_spec.rb
@@ -0,0 +1,36 @@
+require_relative '../../spec_helper'
+require_relative '../../fixtures/constants'
+
+describe "Module#const_missing" do
+  it "is called when an undefined constant is referenced via literal form" do
+    ConstantSpecs::ClassA::CS_CONSTX.should == :CS_CONSTX
+  end
+
+  it "is called when an undefined constant is referenced via #const_get" do
+    ConstantSpecs::ClassA.const_get(:CS_CONSTX).should == :CS_CONSTX
+  end
+
+  it "raises NameError and includes the name of the value that wasn't found" do
+    -> {
+      ConstantSpecs.const_missing("HelloMissing")
+    }.should raise_error(NameError, /ConstantSpecs::HelloMissing/)
+  end
+
+  it "raises NameError and does not include toplevel Object" do
+    begin
+      Object.const_missing("HelloMissing")
+    rescue NameError => e
+      e.message.should_not =~ / Object::/
+    end
+  end
+
+  it "is called regardless of visibility" do
+    klass = Class.new do
+      def self.const_missing(name)
+        "Found:#{name}"
+      end
+      private_class_method :const_missing
+    end
+    klass::Hello.should == 'Found:Hello'
+  end
+end