fix: undefined string when using ucfirst

lib/command/interactive.js

@@ -23,15 +23,23 @@ module.exports = async function (path, options) {
 
     if (options.verbose) output.level(3)
 
+    let addGlobalRetries
+
+    if (config.retry) {
+      addGlobalRetries = function retries() {}
+    }
+
     output.print('Starting interactive shell for current suite...')
     recorder.start()
     event.emit(event.suite.before, {
       fullTitle: () => 'Interactive Shell',
       tests: [],
+      retries: addGlobalRetries,
     })
     event.emit(event.test.before, {
       title: '',
       artifacts: {},
+      retries: addGlobalRetries,
     })
 
     const enabledHelpers = Container.helpers()

lib/utils.js

@@ -94,19 +94,19 @@ module.exports.template = function (template, data) {
 /**
  * Make first char uppercase.
  * @param {string} str
- * @returns {string}
+ * @returns {string | undefined}
  */
 module.exports.ucfirst = function (str) {
-  return str.charAt(0).toUpperCase() + str.substr(1)
+  if (str) return str.charAt(0).toUpperCase() + str.substr(1)
 }
 
 /**
  * Make first char lowercase.
  * @param {string} str
- * @returns {string}
+ * @returns {string | undefined}
  */
 module.exports.lcfirst = function (str) {
-  return str.charAt(0).toLowerCase() + str.substr(1)
+  if (str) return str.charAt(0).toLowerCase() + str.substr(1)
 }
 
 module.exports.chunkArray = function (arr, chunk) {

test/unit/utils_test.js

@@ -38,6 +38,10 @@ describe('utils', () => {
     it('should capitalize first letter', () => {
       expect(utils.ucfirst('hello')).equal('Hello')
     })
+
+    it('should handle the undefined', () => {
+      expect(utils.ucfirst()).to.be.undefined
+    })
   })
 
   describe('#beautify', () => {