fix(always-return): treat process.exit() or process.abort() as an acceptable "return" (#493)

Author: brettz9

__tests__/always-return.js

@@ -17,13 +17,17 @@ ruleTester.run('always-return', rule, {
     'hey.then(x => { return; })',
     'hey.then(x => { return x ? x.id : null })',
     'hey.then(x => { return x * 10 })',
+    'hey.then(x => { process.exit(0); })',
+    'hey.then(x => { process.abort(); })',
     'hey.then(function() { return 42; })',
     'hey.then(function() { return new Promise(); })',
     'hey.then(function() { return "x"; }).then(doSomethingWicked)',
     'hey.then(x => x).then(function() { return "3" })',
     'hey.then(function() { throw new Error("msg"); })',
     'hey.then(function(x) { if (!x) { throw new Error("no x"); } return x; })',
     'hey.then(function(x) { if (x) { return x; } throw new Error("no x"); })',
+    'hey.then(function(x) { if (x) { process.exit(0); } throw new Error("no x"); })',
+    'hey.then(function(x) { if (x) { process.abort(); } throw new Error("no x"); })',
     'hey.then(x => { throw new Error("msg"); })',
     'hey.then(x => { if (!x) { throw new Error("no x"); } return x; })',
     'hey.then(x => { if (x) { return x; } throw new Error("no x"); })',
@@ -140,6 +144,10 @@ ruleTester.run('always-return', rule, {
       code: 'hey.then(function() { if (x) { } else { return x; }})',
       errors: [{ message }],
     },
+    {
+      code: 'hey.then(function() { if (x) { process.chdir(); } else { return x; }})',
+      errors: [{ message }],
+    },
     {
       code: 'hey.then(function() { if (x) { return you.then(function() { return x; }); } })',
       errors: [{ message }],

rules/always-return.js

@@ -202,6 +202,10 @@ module.exports = {
     return {
       'ReturnStatement:exit': markCurrentBranchAsGood,
       'ThrowStatement:exit': markCurrentBranchAsGood,
+      'ExpressionStatement > CallExpression > MemberExpression[object.name="process"][property.name="exit"]:exit':
+        markCurrentBranchAsGood,
+      'ExpressionStatement > CallExpression > MemberExpression[object.name="process"][property.name="abort"]:exit':
+        markCurrentBranchAsGood,
 
       /**
        * @param {CodePathSegment} segment