checkForUnfulfilledExpectations = function () {
    for(var ct = 0; ct < recordedExpects.length; ct++) {
        if(recordedExpects[ct].isFulfilled !== undefined && recordedExpects[ct].isFulfilled() === false) {
            warnUser.call(this, "Some expectation promises were not fulfilled before the test finished. Ensure you are waiting for all the expectations to run");
            break;
        }
    }
}
Exposes tv4's add format method. Allows add custom format for schema validation.
@alias module:chakram.addSchemaFormat
@example
chakram.addSchemaFormat('decimal-digits', function (data, schema) {
    if (typeof data === 'string' && !/^[0-9]+$/.test(data)) {
        return null;
    }
    return "must be string of decimal digits";
});