Test suite: Memory leak in vm.runInNewContext() seems fixed.

Revert 9a4b6fa to drastically improve tests execution time.

tests/run.js

@@ -1,9 +1,9 @@
 "use strict";
 
 var TestDiscovery = require("./helper/test-discovery");
+var TestCase = require("./helper/test-case");
 var path = require("path");
 var argv = require("yargs").argv;
-var child_process = require("child_process");
 
 var testSuite;
 if (argv.language) {
@@ -23,41 +23,19 @@ for (var language in testSuite) {
 		describe("Testing language '" + language + "'", function () {
 			this.timeout(10000);
 
-			// Each set of tests runs in its own child process
-			var child;
-			before(function () {
-				child = child_process.fork(__dirname + "/run-child.js", ['--language=' + language], {
-					stdio: 'inherit'
-				});
-			});
-
-			after(function () {
-				child.kill();
-			});
-
 			testFiles.forEach(
 				function (filePath) {
 			        var fileName = path.basename(filePath, path.extname(filePath));
 
 			        it("– should pass test case '" + fileName + "'",
-			            function (done) {
+			            function () {
+
+				            if (path.extname(filePath) === '.test') {
+					            TestCase.runTestCase(language, filePath);
+				            } else {
+					            TestCase.runTestsWithHooks(language, require(filePath));
+				            }
 
-				            child.removeAllListeners('message');
-			                child.on('message', function (o) {
-				                // We have to delay the call,
-				                // otherwise the first message is received
-				                // over and over again.
-				                setTimeout(function() {
-					                if (o.error) {
-						                throw JSON.parse(o.error);
-					                } else if (o.success) {
-						                done();
-					                }
-				                }, 1);
-			                });
-				            child.send({
-					            filePath: filePath
-				            });
 			            }
 			        );
 				}