Fix mutation to invalid hash pattern

[fix #1417]
mbj · Feb 9, 2024 · a756dae · a756dae
1 parent 42c0dad
commit a756dae
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Showing 3 changed files with 17 additions and 2 deletions.
diff --git a/lib/mutant/mutator/node/literal/hash.rb b/lib/mutant/mutator/node/literal/hash.rb
@@ -36,7 +36,9 @@ class Pair < Node
           private
 
             def dispatch
-              emit_key_mutations
+              emit_key_mutations do |mutation|
+                !mutation.eql?(s(:nil))
+              end
               emit_value_mutations
             end
 

diff --git a/meta/case.rb b/meta/case.rb
@@ -1,5 +1,19 @@
 # frozen_string_literal: true
 
+Mutant::Meta::Example.add :case do
+  source <<-RUBY
+    case nil
+    in { a: nil }
+    end
+  RUBY
+
+  mutation <<~RUBY
+    case nil
+    in {a__mutant__: nil}
+    end
+  RUBY
+end
+
 Mutant::Meta::Example.add :case do
   source <<-RUBY
     case

diff --git a/meta/def.rb b/meta/def.rb
@@ -226,7 +226,6 @@
     mutation 'def foo(**); { ** }; end'
     mutation 'def foo(**); { default: nil }; end'
     mutation 'def foo(**); { default__mutant__: nil, ** }; end'
-    mutation 'def foo(**); { nil => nil, ** }; end'
     mutation 'def foo(**); {}; end'
   end