diff: Output something reasonable when there's no built-in diff for t…

…he operands, eg. for numbers.

lib/uninspected.js

@@ -58,8 +58,13 @@ uninspected.diff = function (a, b) {
     var result = unexpected.diff(a, b);
     if (result && result.diff) {
         uninspected.log(result.diff);
-    } else {
+    } else if (unexpected.equal(a, b)) {
         uninspected.log(a);
+    } else {
+        uninspected.log(unexpected.output.clone()
+            .text('-').append(unexpected.inspect(a)).nl()
+            .text('+').append(unexpected.inspect(b))
+        );
     }
 };
 

test/uninspected.js

@@ -80,5 +80,15 @@ describe('uninspected', function () {
             );
             console.log.restore(); // Cannot do this in an afterEach as it'll suppress mocha's output
         });
+
+        it('should do something reasonable when diffing primitive values with no specific built-in diff', function () {
+            uninspected.outputFormat = 'text';
+            uninspected.diff(123, 456);
+            expect(console.log, 'was called with',
+                '-123\n' +
+                '+456'
+            );
+            console.log.restore(); // Cannot do this in an afterEach as it'll suppress mocha's output
+        });
     });
 });