feat: Write data to process.stdout and process.stderr for debug

README.md

@@ -90,6 +90,10 @@ Write data to stdin, see example above.
 
 Callback will be called after completing the assertion, the first argument is Error if throw exception. 
 
+#### coffee.debug()
+
+Write data to process.stdout and process.stderr for debug
+
 ## LISENCE
 
 Copyright (c) 2015 popomore. Licensed under the MIT license.

lib/coffee.js

@@ -18,6 +18,11 @@ function Coffee(opt) {
   this.restore();
 }
 
+Coffee.prototype.debug = function() {
+  this._debug = true;
+  return this;
+};
+
 // Only accept these type below for assertion
 var acceptType = ['stdout', 'stderr', 'code'];
 Coffee.prototype.expect = function(type, value) {
@@ -45,12 +50,14 @@ Coffee.prototype.end = function(cb) {
   cmd.stdout &&
   cmd.stdout.on('data', function(buf) {
     debug('output stdout `%s`', show(buf));
+    self._debug && process.stdout.write(buf);
     self.stdout += buf;
   });
 
   cmd.stderr &&
   cmd.stderr.on('data', function(buf) {
     debug('output stderr `%s`', show(buf));
+    self._debug && process.stderr.write(buf);
     self.stderr += buf;
   });
 
@@ -100,6 +107,7 @@ Coffee.prototype.restore = function() {
   };
   this.complete = false;
   this._isEndCalled = false;
+  this._debug = false;
   return this;
 };
 

test/index.js

@@ -173,6 +173,6 @@ function run(type) {
 
   function call(filepath) {
     filepath += type === 'fork' ? '.js' : '.sh';
-    return coffee[type](path.join(__dirname, 'fixtures/' + filepath));
+    return coffee[type](path.join(__dirname, 'fixtures/' + filepath)).debug();
   }
 }