Angular + Mocha memory leak

Question

I\'m getting the following error when running the entire suite of tests:

timeout of 2000ms exceeded. Ensure the done() callback is being called in this test.

Answer 1

It looks like ui-router leaks memory in unit tests. I added the following code in the run block of my application:

$rootScope.$on('$destroy', function() {
    var clearAllMembers = function(obj, depth) { // prevent infinite recursion because of circular references
        depth = depth || 0;
        if (depth > 10) {
            return;
        }
        for (var i in obj) {
            if (obj.hasOwnProperty(i)) {
                if (typeof(obj[i]) == 'object') {
                    clearAllMembers(obj[i], ++depth);
                }
                if (obj) {
                    if (obj[i] && (obj[i] instanceof Array) && obj[i].length) {
                        obj[i].splice(0);
                    }
                    delete obj[i];
                }
            }
        }
    }

    setTimeout(function() {
        clearAllMembers($stateRegistry); // ui-router 1.0+
        clearAllMembers($urlRouter);
        clearAllMembers($urlService); // ui-router 1.0+
        clearAllMembers($state);
    });
});

and the memory consumption in unit tests is 7-8 times smaller (I have around 350 states).