closes #865: Disable timeouts when running under the debug

bin/_mocha

@@ -81,6 +81,7 @@ program
   .option('--compilers <ext>:<module>,...', 'use the given module(s) to compile files', list, [])
   .option('--debug-brk', "enable node's debugger breaking on the first line")
   .option('--globals <names>', 'allow the given comma-delimited global [names]', list, [])
+  .option('--disable-timeouts', 'this is given implicitly when debugging')
   .option('--harmony', 'enable all harmony features (except typeof)')
   .option('--harmony-collections', 'enable harmony collections (sets, maps, and weak maps)')
   .option('--harmony-generators', 'enable harmony generators')
@@ -229,6 +230,10 @@ if (program.inlineDiffs) mocha.useInlineDiffs(true);
 
 if (program.slow) mocha.suite.slow(program.slow);
 
+// --disable-timeouts
+
+if (program.disableTimeouts) Mocha.Runnable.prototype.disableTimeouts = true;
+
 // --timeout
 
 if (program.timeout) mocha.suite.timeout(program.timeout);

bin/mocha

@@ -14,11 +14,13 @@ process.argv.slice(2).forEach(function(arg){
   switch (flag) {
     case '-d':
       args.unshift('--debug');
+      args.push('--disable-timeouts');
       break;
     case 'debug':
     case '--debug':
     case '--debug-brk':
       args.unshift(arg);
+      args.push('--disable-timeouts');
       break;
     case '-gc':
     case '--expose-gc':

lib/runnable.js

@@ -53,6 +53,12 @@ function Runnable(title, fn) {
 
 Runnable.prototype.__proto__ = EventEmitter.prototype;
 
+/**
+ * Set this value to true to disable timeouts.
+ */
+
+Runnable.prototype.disableTimeouts = false;
+
 /**
  * Set & get timeout `ms`.
  *
@@ -134,6 +140,7 @@ Runnable.prototype.resetTimeout = function(){
   var self = this;
   var ms = this.timeout() || 1e9;
 
+  if (this.disableTimeouts) return;
   this.clearTimeout();
   this.timer = setTimeout(function(){
     self.callback(new Error('timeout of ' + ms + 'ms exceeded'));
@@ -182,7 +189,7 @@ Runnable.prototype.run = function(fn){
     self.clearTimeout();
     self.duration = new Date - start;
     finished = true;
-    if (!err && self.duration > ms) err = new Error('timeout of ' + ms + 'ms exceeded');
+    if (!err && self.duration > ms && !self.disableTimeouts) err = new Error('timeout of ' + ms + 'ms exceeded');
     fn(err);
   }
 

test/acceptance/timeout.js

@@ -18,4 +18,27 @@ describe('timeouts', function(){
       done();
     }, 300);
   })
+
+  describe('when disabled', function(){
+    var Mocha = require('../../lib/mocha');
+    var timeout;
+
+    beforeEach(function(){
+      Mocha.Runnable.prototype.disableTimeouts = true;
+      timeout = this.timeout();
+    })
+
+    afterEach(function(){
+      Mocha.Runnable.prototype.disableTimeouts = false;
+    })
+
+    it('should be ignored for async suites', function(done){
+      setTimeout(done, timeout + 10);
+    })
+
+    it('should be ignored for sync suites', function(){
+      var start = Date.now();
+      while(Date.now() - start < timeout)continue;
+    })
+  });
 })