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

node_modules/@sinonjs/samsam/lib/is-neg-zero.js

@@ -0,0 +1,13 @@
+"use strict";
+
+/**
+ * @name samsam.isNegZero
+ * @param Object value
+ *
+ * Returns ``true`` if ``value`` is ``-0``.
+ */
+function isNegZero(value) {
+    return value === 0 && 1 / value === -Infinity;
+}
+
+module.exports = isNegZero;