Replace .indexOf(...) != -1 with .includes()

test/unit/controller/index.js

@@ -58,7 +58,7 @@ module.exports.tests.info_html = function(test, common) {
     var res = { send: function( content ){
       t.equal(typeof content, 'string', 'returns string');
       t.assert(content.indexOf(style) === 0, 'style set');
-      t.assert(content.indexOf(mockText) !== -1, 'file content added');
+      t.true(content.includes(mockText), 'file content added');
       t.end();
     }};
     controller( req, res );

test/unit/mock/backend.js

@@ -76,7 +76,7 @@ function setup( key, cmdCb ){
       client: {
         mget: function( cmd, cb ){
           if( 'function' === typeof cmdCb ){ cmdCb( cmd ); }
-          return responses[key.indexOf('mget') === -1 ? 'client/mget/ok/1' : key].apply( this, arguments );
+          return responses[key.includes('mget') ? key : 'client/mget/ok/1'].apply( this, arguments );
         },
         suggest: function( cmd, cb ){
           if( 'function' === typeof cmdCb ){ cmdCb( cmd ); }

test/unit/sanitizer/_categories.js

@@ -61,7 +61,7 @@ module.exports.tests.valid_categories = function(test, common) {
   var validCategories = {
     isValidCategory: function (cat) {
       isValidCategoryCalled++;
-      return ['food','health','financial','education','government'].indexOf(cat) !== -1; }
+      return ['food','health','financial','education','government'].includes(cat); }
   };
 
   test('single category', function(t) {
@@ -113,7 +113,7 @@ module.exports.tests.invalid_categories = function(test, common) {
   var validCategories = {
     isValidCategory: function (cat) {
       isValidCategoryCalled++;
-      return ['food','health','financial','education','government'].indexOf(cat) !== -1; }
+      return ['food','health','financial','education','government'].includes(cat); }
   };
 
   test('garbage category', function(t) {

test/unit/sanitizer/search.js

@@ -34,7 +34,7 @@ module.exports.tests.sanitize = function(test, common) {
 
       },
       '../sanitizer/_targets': function(type) {
-        if (['layers', 'sources'].indexOf(type) !== -1) {
+        if (['layers', 'sources'].includes(type)) {
           return function() {
             called_sanitizers.push('_targets/' + type);
             return { errors: [], warnings: [] };