peteryates · August 29, 2015 14:18 · Mar 31, 2015 · Jul 22, 2014
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -9,11 +9,11 @@ RSpec::Matchers.define :alias_from do |alias_method|
       raise "expected alias_method from #{alias_method} to #{@original_method} but #{alias_method} is not defined"
     end
 
-    expect(subject.method(alias_method)).to eq(subject.method(@original_method))
+    subject.method(alias_method).eql?(subject.method(@original_method))
   end
 
   description do
-    "RSpec matcher for alias_method"
+    "delegate :#{@original_method} to :#{alias_method}"
   end
 
   failure_message do |text|
@@ -25,4 +25,4 @@ RSpec::Matchers.define :alias_from do |alias_method|
   end
 
   chain(:to) { |original_method| @original_method = original_method }
-end
+end
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -0,0 +1,28 @@
+# Original: https://gist.github.com/otaviomedeiros/1950961
+# Updated for new RSpec syntax
+
+RSpec::Matchers.define :alias_from do |alias_method|
+  match do |subject|
+    begin
+      subject.send(alias_method)
+    rescue NoMethodError
+      raise "expected alias_method from #{alias_method} to #{@original_method} but #{alias_method} is not defined"
+    end
+
+    expect(subject.method(alias_method)).to eq(subject.method(@original_method))
+  end
+
+  description do
+    "RSpec matcher for alias_method"
+  end
+
+  failure_message do |text|
+    "expected alias_method from #{alias_method} to #{@original_method}"
+  end
+
+  failure_message_when_negated do |text|
+    "do not expected alias_method from #{alias_method} to #{@original_method}"
+  end
+
+  chain(:to) { |original_method| @original_method = original_method }
+end