1 files changed, 44 insertions, 0 deletions
diff --git a/mocha_test/forever.js b/mocha_test/forever.js
new file mode 100644
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+++ b/mocha_test/forever.js
@@ -0,0 +1,44 @@
+var async = require('../lib/async');
+var expect = require('chai').expect;
+var isBrowser = require('./support/is_browser');
+
+describe('forever', function(){
+    context('function is asynchronous', function(){
+        it('executes the function over and over until it yields an error', function(done){
+            var counter = 0;
+            addOne = function (callback) {
+                counter++;
+                if (counter === 50) {
+                    return callback('too big!');
+                }
+                async.setImmediate(function () {
+                    callback();
+                });
+            }
+            async.forever(addOne, function (err) {
+                expect(err).to.eql('too big!');
+                expect(counter).to.eql(50);
+                done();
+            });
+        })
+    });
+
+    context('function is synchronous', function(){
+        it('does not cause a stack overflow', function(done){
+            if (isBrowser()) return done(); // this will take forever in a browser
+            var counter = 0;
+            function addOne(callback) {
+                counter++;
+                if (counter === 50000) { // needs to be huge to potentially overflow stack in node
+                    return callback('too big!');
+                }
+                callback();
+            }
+            async.forever(addOne, function (err) {
+                expect(err).to.eql('too big!');
+                expect(counter).to.eql(50000);
+                done();
+            });
+        });
+    });
+});