added unit testing, and started implementing unit tests...phew

node_modules/nise/lib/configure-logger/index.js

@@ -0,0 +1,47 @@
+"use strict";
+
+// cache a reference to setTimeout, so that our reference won't be stubbed out
+// when using fake timers and errors will still get logged
+// https://github.com/cjohansen/Sinon.JS/issues/381
+var realSetTimeout = setTimeout;
+
+function configureLogger(config) {
+    config = config || {};
+    // Function which prints errors.
+    if (!config.hasOwnProperty("logger")) {
+        config.logger = function () { };
+    }
+    // When set to true, any errors logged will be thrown immediately;
+    // If set to false, the errors will be thrown in separate execution frame.
+    if (!config.hasOwnProperty("useImmediateExceptions")) {
+        config.useImmediateExceptions = true;
+    }
+    // wrap realSetTimeout with something we can stub in tests
+    if (!config.hasOwnProperty("setTimeout")) {
+        config.setTimeout = realSetTimeout;
+    }
+
+    return function logError(label, e) {
+        var msg = label + " threw exception: ";
+        var err = { name: e.name || label, message: e.message || e.toString(), stack: e.stack };
+
+        function throwLoggedError() {
+            err.message = msg + err.message;
+            throw err;
+        }
+
+        config.logger(msg + "[" + err.name + "] " + err.message);
+
+        if (err.stack) {
+            config.logger(err.stack);
+        }
+
+        if (config.useImmediateExceptions) {
+            throwLoggedError();
+        } else {
+            config.setTimeout(throwLoggedError, 0);
+        }
+    };
+}
+
+module.exports = configureLogger;