Removed confusing files requirement for cli run

bin/_mocha

@@ -30,10 +30,10 @@ cli.setMochaOptions(
   opts
 );
 
-var files = cli.resolveFiles(program.args, opts);
+mocha.files = cli.resolveFiles(program.args, opts);
 
 try {
-  cli.run(mocha, program, files);
+  cli.run(mocha, program);
 } catch (e) {
   console.error(e.message);
   process.exit(1);

lib/cli/cli.js

@@ -413,19 +413,15 @@ exports.setMochaOptions = function (mocha, program) {
 
 /**
  * runs/watch mocha.
- * call after parsing options in Command
+ * call after parsing options in Command,
+ * resolved files need to have been added to mocha manually
  *
  * @param {Mocha} mocha instance to run
  * @param {*} options parsed options to set (from program._opts())
- * @param {string[]} files resolved files from resolveFiles
  */
-exports.run = function (mocha, options, files) {
+exports.run = function (mocha, options) {
   Error.stackTraceLimit = Infinity; // TODO: config
 
-  if (!files.length) {
-    throw new Error('No test files found');
-  }
-
   process.on('SIGINT', function () {
     runner.abort();
 
@@ -456,7 +452,6 @@ exports.run = function (mocha, options, files) {
 
     loadAndRun = function loadAndRun () {
       try {
-        mocha.files = files;
         runAgain = false;
         runner = mocha.run(function () {
           runner = null;
@@ -499,8 +494,6 @@ exports.run = function (mocha, options, files) {
     });
   } else {
     // load
-
-    mocha.files = files;
     runner = mocha.run(options.exit ? exit : exitLater);
   }
 };