omit expected and actual if there is no actual or expected

Author: James Halliday

lib/results.js

@@ -141,16 +141,18 @@ function encodeResult (res, count) {
     output += outer + '---\n';
     output += inner + 'operator: ' + res.operator + '\n';
 
-    var ex = inspect(res.expected);
-    var ac = inspect(res.actual);
-    
-    if (Math.max(ex.length, ac.length) > 65) {
-        output += inner + 'expected:\n' + inner + '  ' + ex + '\n';
-        output += inner + 'actual:\n' + inner + '  ' + ac + '\n';
-    }
-    else {
-        output += inner + 'expected: ' + ex + '\n';
-        output += inner + 'actual:   ' + ac + '\n';
+    if (has(res, 'expected') || has(res, 'actual')) {
+        var ex = inspect(res.expected);
+        var ac = inspect(res.actual);
+        
+        if (Math.max(ex.length, ac.length) > 65) {
+            output += inner + 'expected:\n' + inner + '  ' + ex + '\n';
+            output += inner + 'actual:\n' + inner + '  ' + ac + '\n';
+        }
+        else {
+            output += inner + 'expected: ' + ex + '\n';
+            output += inner + 'actual:   ' + ac + '\n';
+        }
     }
     if (res.at) {
         output += inner + 'at: ' + res.at + '\n';
@@ -181,3 +183,7 @@ function getNextTest (results) {
         }
     } while (results.tests.length !== 0)
 }
+
+function has (obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+}

lib/test.js

@@ -109,11 +109,10 @@ Test.prototype.end = function (err) {
 };
 
 Test.prototype._end = function (err) {
+    var self = this;
     if (this._progeny.length) {
         var t = this._progeny.shift();
-        t.on('end', function () {
-            self._end();
-        });
+        t.on('end', function () { self._end() });
         t.run();
         return;
     }
@@ -166,9 +165,13 @@ Test.prototype._assert = function assert (ok, opts) {
         skip : defined(extra.skip, opts.skip),
         name : defined(extra.message, opts.message, '(unnamed assert)'),
         operator : defined(extra.operator, opts.operator),
-        actual : defined(extra.actual, opts.actual),
-        expected : defined(extra.expected, opts.expected)
     };
+    if (has(opts, 'actual') || has(extra, 'actual')) {
+        res.actual = defined(extra.actual, opts.actual);
+    }
+    if (has(opts, 'expected') || has(extra, 'expected')) {
+        res.expected = defined(extra.expected, opts.expected);
+    }
     this._ok = Boolean(this._ok && ok);
 
     if (!ok) {
@@ -436,4 +439,8 @@ Test.prototype.doesNotThrow = function (fn, expected, msg, extra) {
     });
 };
 
+function has (obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
 // vim: set softtabstop=4 shiftwidth=4: