Add event-eliminator mutator

src/commands.js

@@ -23,7 +23,8 @@ function generateAllMutations(files) {
 
   const mutator = new mutators.CompositeMutator([
     new mutators.ConditionalBoundaryMutator(),
-    new mutators.LiteralMutator()
+    new mutators.LiteralMutator(),
+    new mutators.EventEliminatorMutator()
   ])
 
   for (const file of files) {

src/mutators/event-eliminator.js

@@ -0,0 +1,25 @@
+const Mutation = require('../mutation')
+
+function EventEliminatorMutator() {}
+
+EventEliminatorMutator.prototype.name = 'event-remover'
+
+EventEliminatorMutator.prototype.getMutations = function(file, source, visit) {
+  const mutations = []
+
+  visit({
+    EmitStatement: (node) => {
+      const start = node.range[0]
+      const end = node.range[1]
+
+      const text = source.slice(start, end + 1)
+      const replacement = '/* commented out ' + text + ' */'
+
+      mutations.push(new Mutation(file, start, end + 1, replacement))
+    }
+  })
+
+  return mutations
+}
+
+module.exports = EventEliminatorMutator

src/mutators/index.js

@@ -1,4 +1,5 @@
 const ConditionalBoundaryMutator = require('./conditional-boundary')
+const EventEliminatorMutator = require('./event-eliminator')
 const LiteralMutator = require('./literal')
 
 function CompositeMutator(mutators) {
@@ -15,6 +16,7 @@ CompositeMutator.prototype.getMutations = function(file, source, visit) {
 
 module.exports = {
   ConditionalBoundaryMutator: ConditionalBoundaryMutator,
+  EventEliminatorMutator: EventEliminatorMutator,
   LiteralMutator: LiteralMutator,
   CompositeMutator: CompositeMutator
 }