fix(benchpress): benchpress fixes and a smoke test for Dart

tools/build/run_server_dart_tests.js

@@ -0,0 +1,48 @@
+var Q = require('q');
+var glob = require('glob');
+var fs = require('fs');
+var path = require('path');
+var spawn = require('child_process').spawn;
+
+var util = require('./util');
+
+module.exports = function(gulp, plugins, config) {
+  return function() {
+    return util.forEachSubDir(
+      config.dest,
+      function(dir) {
+        var testDir = path.join(dir, 'test');
+        var relativeMasterTestFile = 'test/_all_tests.dart';
+        var testFiles = [].slice.call(glob.sync('**/*.server.spec.dart', {
+          cwd: testDir
+        }));
+        if (testFiles.length == 0) {
+          // No test files found
+          return;
+        }
+        var header = ['library _all_tests;', ''];
+        var main = ['main() {'];
+        testFiles.forEach(function(fileName, index) {
+          header.push('import "' + fileName + '" as test_' + index + ';');
+          main.push('  test_' + index + '.main();');
+        });
+        header.push('');
+        main.push('}');
+
+        var absMasterTestFile = path.join(dir, relativeMasterTestFile);
+        fs.writeFileSync(absMasterTestFile, header.concat(main).join('\n'));
+
+        var defer = Q.defer();
+        var done = defer.makeNodeResolver();
+        util.processToPromise(spawn('dart', ['-c', relativeMasterTestFile], {
+          stdio: 'inherit',
+          cwd: dir
+        })).then(
+          function() { done(); },
+          function(error) { done(error); }
+        );
+        return defer.promise;
+      }
+    );
+  };
+};