(new) test for NaN, and added assert.isNaN

Author: cloudhead

lib/vows/macros.js

@@ -63,7 +63,16 @@ assert.isObject = function (actual, message) {
     assertTypeOf(actual, 'object', message || "expected {actual} to be an Object", assert.isObject);
 };
 assert.isNumber = function (actual, message) {
-    assertTypeOf(actual, 'number', message || "expected {actual} to be a Number", assert.isNumber);
+    if (isNaN(actual)) {
+        assert.fail(actual, 'number', message || "expected {actual} to be of type {expected}", "isNaN", assert.isNumber);
+    } else {
+        assertTypeOf(actual, 'number', message || "expected {actual} to be a Number", assert.isNumber);
+    }
+};
+assert.isNaN = function (actual, message) {
+    if (! isNaN(actual)) {
+        assert.fail(actual, 'NaN', message || "expected {actual} to be NaN", "isNaN", assert.isNaN);
+    }
 };
 assert.isString = function (actual, message) {
     assertTypeOf(actual, 'string', message || "expected {actual} to be a String", assert.isString);

test/vows-test.js

@@ -41,6 +41,8 @@ vows.describe("Vows").addVows({
             assert.typeOf(it, 'string');
             assert.isArray([]);
             assert.isObject({});
+            assert.isNumber(0);
+            assert.isNaN(0/0);
         },
         "testing emptiness": function (it) {
             assert.isEmpty({});