Add a === b -> a.is_a?(b) mutation

mbj · Jan 2, 2021 · 94322f9 · 94322f9
1 parent 44c23ea
commit 94322f9
Show file tree

Hide file tree

Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/lib/mutant/mutator/node/send.rb b/lib/mutant/mutator/node/send.rb
@@ -17,6 +17,7 @@ class Send < self
           :< =>          %i[== eql? equal?],
           :<= =>         %i[< == eql? equal?],
           :== =>         %i[eql? equal?],
+          :=== =>        %i[is_a?],
           :> =>          %i[== eql? equal?],
           :>= =>         %i[> == eql? equal?],
           __send__:      %i[public_send],

diff --git a/meta/send.rb b/meta/send.rb
@@ -562,7 +562,7 @@
   mutation 'foo(n..-2)'
 end
 
-(Mutant::AST::Types::BINARY_METHOD_OPERATORS - %i[=~ <= >= < > == != eql?]).each do |operator|
+(Mutant::AST::Types::BINARY_METHOD_OPERATORS - %i[=~ <= >= < > == === != eql?]).each do |operator|
   Mutant::Meta::Example.add :send do
     source "true #{operator} false"
 
@@ -727,3 +727,17 @@
   mutation 'foo'
   mutation 'foo(a__mutant__: nil)'
 end
+
+Mutant::Meta::Example.add :send do
+  source 'a === b'
+
+  singleton_mutations
+
+  mutation 'a'
+  mutation 'b'
+  mutation 'nil === b'
+  mutation 'self === b'
+  mutation 'a === nil'
+  mutation 'a === self'
+  mutation 'a.is_a?(b)'
+end