From 99b19a1d9282f4e1c6c33eda6377d489dc84bc84 Mon Sep 17 00:00:00 2001
From: Markus Schirp <mbj@schirp-dso.com>
Date: Fri, 25 Jul 2014 17:33:01 +0000
Subject: [PATCH] Add mutation from {is_a,kind_of}? to instance_of?

---
 lib/mutant/mutator/node/send.rb |  2 ++
 meta/send.rb                    | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/lib/mutant/mutator/node/send.rb b/lib/mutant/mutator/node/send.rb
index c92cdae7..1022cc80 100644
--- a/lib/mutant/mutator/node/send.rb
+++ b/lib/mutant/mutator/node/send.rb
@@ -12,6 +12,8 @@ module Mutant
 
         SELECTOR_REPLACEMENTS = IceNine.deep_freeze(
           reverse_map:  [:map, :each],
+          kind_of?:     [:instance_of?],
+          is_a?:        [:instance_of?],
           reverse_each: [:each],
           map:          [:each],
           send:         [:public_send],
diff --git a/meta/send.rb b/meta/send.rb
index f274a478..d2fd7554 100644
--- a/meta/send.rb
+++ b/meta/send.rb
@@ -63,6 +63,32 @@ Mutant::Meta::Example.add do
   mutation 'foo.equal?(bar)'
 end
 
+Mutant::Meta::Example.add do
+  source 'foo.is_a?(bar)'
+
+  singleton_mutations
+  mutation 'foo'
+  mutation 'bar'
+  mutation 'foo.is_a?'
+  mutation 'foo.is_a?(nil)'
+  mutation 'foo.is_a?(self)'
+  mutation 'self.is_a?(bar)'
+  mutation 'foo.instance_of?(bar)'
+end
+
+Mutant::Meta::Example.add do
+  source 'foo.kind_of?(bar)'
+
+  singleton_mutations
+  mutation 'foo'
+  mutation 'bar'
+  mutation 'foo.kind_of?'
+  mutation 'foo.kind_of?(nil)'
+  mutation 'foo.kind_of?(self)'
+  mutation 'self.kind_of?(bar)'
+  mutation 'foo.instance_of?(bar)'
+end
+
 Mutant::Meta::Example.add do
   source 'foo.gsub(a, b)'