[Refactor] remove unused line, unneeded var initialization; add missing new

Author: ljharb

lib/test.js

@@ -146,8 +146,7 @@ Test.prototype.timeoutAfter = function (ms) {
     });
 };
 
-Test.prototype.end = function (err) {
-    var self = this;
+Test.prototype.end = function end(err) {
     if (arguments.length >= 1 && !!err) {
         this.ifError(err);
     }
@@ -493,7 +492,7 @@ Test.prototype['throws'] = function (fn, expected, msg, extra) {
         expected = undefined;
     }
 
-    var caught = undefined;
+    var caught;
 
     try {
         fn();
@@ -532,11 +531,10 @@ Test.prototype.doesNotThrow = function (fn, expected, msg, extra) {
         msg = expected;
         expected = undefined;
     }
-    var caught = undefined;
+    var caught;
     try {
         fn();
-    }
-    catch (err) {
+    } catch (err) {
         caught = { error: err };
     }
     this._assert(!caught, {
@@ -595,7 +593,7 @@ Test.prototype.doesNotMatch = function doesNotMatch(string, regexp, msg, extra)
 Test.skip = function (name_, _opts, _cb) {
     var args = getTestArgs.apply(null, arguments);
     args.opts.skip = true;
-    return Test(args.name, args.opts, args.cb);
+    return new Test(args.name, args.opts, args.cb);
 };
 
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