fix: missing methods from I actor (#3703)

* fix: generate types command

* fix: step_file template

lib/command/init.js

@@ -55,6 +55,18 @@ module.exports = function() {
 }
 `;
 
+const defaultActorTs = `// in this file you can append custom step methods to 'I' object
+
+export = function() {
+  return actor({
+
+    // Define custom steps here, use 'this' to access default methods of I.
+    // It is recommended to place a general 'login' function here.
+
+  });
+}
+`;
+
 module.exports = function (initPath) {
   const testsPath = getTestRoot(initPath);
 
@@ -188,7 +200,7 @@ module.exports = function (initPath) {
       // create steps file by default
       // no extra step file for typescript (as it doesn't match TS conventions)
       const stepFile = `./steps_file.${extension}`;
-      fs.writeFileSync(path.join(testsPath, stepFile), defaultActor);
+      fs.writeFileSync(path.join(testsPath, stepFile), extension === 'ts' ? defaultActorTs : defaultActor);
       config.include.I = isTypeScript === true ? './steps_file' : stepFile;
       print(`Steps file created at ${stepFile}`);