Gracefully exit on SIGINT

bin/_mocha

@@ -348,12 +348,14 @@ if (program.watch) {
 // load
 
 mocha.files = files;
-mocha.run(program.exit ? process.exit : exitLater);
+var runner = mocha.run(program.exit ? process.exit : exitLater);
 
 function exitLater(code) {
   process.on('exit', function() { process.exit(code) })
 }
 
+process.on('SIGINT', function() { runner.abort(); })
+
 // enable growl notifications
 
 function growl(runner, reporter) {

lib/runner.js

@@ -51,6 +51,7 @@ module.exports = Runner;
 function Runner(suite) {
   var self = this;
   this._globals = [];
+  this._aborting = false;
   this.suite = suite;
   this.total = suite.total();
   this.failures = 0;
@@ -205,12 +206,12 @@ Runner.prototype.fail = function(test, err){
  * - If bail, then exit
  * - Failed `before` hook skips all tests in a suite and subsuites,
  *   but jumps to corresponding `after` hook
- * - Failed `before each` hook skips remaining tests in a 
+ * - Failed `before each` hook skips remaining tests in a
  *   suite and jumps to corresponding `after each` hook,
  *   which is run only once
  * - Failed `after` hook does not alter
  *   execution order
- * - Failed `after each` hook skips remaining tests in a 
+ * - Failed `after each` hook skips remaining tests in a
  *   suite and subsuites, but executes other `after each`
  *   hooks
  *
@@ -259,7 +260,7 @@ Runner.prototype.hook = function(name, fn){
       var testError = hook.error();
       if (testError) self.fail(self.test, testError);
       if (err) {
-        self.failHook(hook, err); 
+        self.failHook(hook, err);
 
         // stop executing hooks, notify callee of hook err
         return fn(err);
@@ -397,7 +398,7 @@ Runner.prototype.runTests = function(suite, fn){
     // for failed 'after each' hook start from errSuite parent,
     // otherwise start from errSuite itself
     self.suite = after ? errSuite.parent : errSuite;
-    
+
     if (self.suite) {
       // call hookUp afterEach
       self.hookUp('afterEach', function(err2, errSuite2) {
@@ -408,7 +409,7 @@ Runner.prototype.runTests = function(suite, fn){
         fn(errSuite);
       });
     } else {
-      // there is no need calling other 'after each' hooks 
+      // there is no need calling other 'after each' hooks
       self.suite = orig;
       fn(errSuite);
     }
@@ -418,6 +419,8 @@ Runner.prototype.runTests = function(suite, fn){
     // if we bail after first err
     if (self.failures && suite._bail) return fn();
 
+    if (self._aborting) return fn();
+
     if (err) return hookErr(err, errSuite, true);
 
     // next test
@@ -500,6 +503,8 @@ Runner.prototype.runSuite = function(suite, fn){
       }
     }
 
+    if (self._aborting) return done();
+
     var curr = suite.suites[i++];
     if (!curr) return done();
     self.runSuite(curr, next);
@@ -584,6 +589,17 @@ Runner.prototype.run = function(fn){
   return this;
 };
 
+/**
+ * Cleanly abort execution
+ *
+ * @return {Runner} for chaining
+ * @api public
+ */
+Runner.prototype.abort = function(){
+  debug('aborting');
+  this._aborting = true;
+}
+
 /**
  * Filter leaks with the given globals flagged as `ok`.
  *

test/acceptance/misc/many.js

@@ -0,0 +1,27 @@
+// Useful for testing SIGINT handler
+// use env.big_number to tune iterations so that you have time to ctrl+c
+
+describe('a load of tests', function(){
+  it('should fail the first test', function(){
+    throw new Error('this should appear in the summary');
+  })
+
+  var iterations = (process.env.big_number || 1e7);
+  function work() {
+    var a = 0;
+    for(var i=0; i<iterations; ++i) {
+      a += i;
+    }
+  }
+
+  function addTest() {
+    it('should pass test ' + i, function(){
+      work();
+    })
+  }
+
+  for(var i=0; i<500; ++i) {
+    addTest();
+  }
+
+})