feature-detect process.exit() and "exit" events, exit tests now passes

Author: James Halliday

index.js

@@ -6,6 +6,17 @@ exports = module.exports = createHarness();
 exports.createHarness = createHarness;
 exports.Test = Test;
 
+var canEmitExit = false;
+var canExit = false;
+//*
+var canEmitExit = typeof process !== 'undefined' && process
+    && typeof process.on === 'function'
+;
+var canExit = typeof process !== 'undefined' && process
+    && typeof process.exit === 'function'
+;
+//*/
+        
 function createHarness () {
     var pending = [];
     var running = false;
@@ -15,6 +26,15 @@ function createHarness () {
 
     var test = function (name, conf, cb) {
         var t = new Test(name, conf, cb);
+        if (!conf || typeof conf !== 'object') conf = {};
+        
+        if (conf.exit !== false && canEmitExit) {
+            process.on('exit', function (code) {
+                t._exit();
+                out.close();
+                if (code === 0 && !t._ok) process.exit(1);
+            });
+        }
 
         process.nextTick(function () {
             if (!out.piped) out.pipe(createDefaultStream());
@@ -40,7 +60,7 @@ function createHarness () {
 
         t.on('end', onend);
 
-        return t
+        return t;
 
         function onend () {
             running = false;
@@ -56,8 +76,11 @@ function createHarness () {
             }
 
             process.nextTick(function () {
-                if (pending.length) pending.shift()()
-                else out.close()
+                if (pending.length) return pending.shift()();
+                out.close();
+                if (conf.exit !== false && canExit && !t._ok) {
+                    process.exit(1);
+                }
             });
         }
     };

lib/test.js

@@ -32,6 +32,7 @@ function Test (name_, opts_, cb_) {
     this._plan = undefined;
     this._cb = cb;
     this._progeny = [];
+    this._ok = true;
 }
 
 Test.prototype.run = function () {
@@ -70,6 +71,21 @@ Test.prototype.end = function () {
     this.ended = true;
 };
 
+Test.prototype._exit = function () {
+    if (this._plan !== undefined &&
+        !this._planError && this.assertCount !== this._plan) {
+        this._planError = true;
+        this.fail('plan != count', {
+            expected : this._plan,
+            actual : this.assertCount
+        });
+    }
+    else if (!this.ended) {
+        this.fail('test exited without ending');
+    }
+    
+};
+
 Test.prototype._assert = function assert (ok, opts) {
     var self = this;
     var extra = opts.extra || {};
@@ -83,6 +99,7 @@ Test.prototype._assert = function assert (ok, opts) {
         actual : defined(extra.actual, opts.actual),
         expected : defined(extra.expected, opts.expected)
     };
+    this._ok = Boolean(this._ok && ok);
 
     if (!ok) {
         res.error = defined(extra.error, opts.error, new Error(res.name));

test/exit.js

@@ -93,7 +93,7 @@ tap.test('too few exit', function (t) {
             { id: 3, ok: true, name: 'should be equivalent' },
             { id: 4, ok: true, name: 'should be equivalent' },
             { id: 5, ok: true, name: 'should be equivalent' },
-            { id: 6, ok: false, name: 'too few assertions' },
+            { id: 6, ok: false, name: 'plan != count' },
             'tests 6',
             'pass  5',
             'fail  1'