E2e mock server

gulpfile.js

@@ -32,6 +32,9 @@ var prebid = require('./package.json');
 var dateString = 'Updated : ' + (new Date()).toISOString().substring(0, 10);
 var banner = '/* <%= prebid.name %> v<%= prebid.version %>\n' + dateString + ' */\n';
 var port = 9999;
+const prebidLocation = './src/prebid.js';
+const mockServerPort = 3000;
+const host = argv.host ? argv.host : 'localhost';
 
 // these modules must be explicitly listed in --modules to be included in the build, won't be part of "all" modules
 var explicitModules = [
@@ -309,6 +312,12 @@ function setupE2e(done) {
   done();
 }
 
+gulp.task('updatepath', function(){
+  return gulp.src(['build/dev/*.js'])
+  .pipe(replace('ib.adnxs.com/ut/v3/prebid', host + ':' + mockServerPort + '/'))
+  .pipe(gulp.dest('build/dev'));
+});
+
 // support tasks
 gulp.task(lint);
 gulp.task(watch);
@@ -331,10 +340,17 @@ gulp.task('coveralls', gulp.series('test-coverage', coveralls));
 gulp.task('build', gulp.series(clean, 'build-bundle-prod'));
 gulp.task('build-postbid', gulp.series(escapePostbidConfig, buildPostbid));
 
+gulp.task('mockserver', function() {
+  return gulp.src(prebidLocation)
+    .pipe(shell('node ./test/mock-server/index.js --port='+mockServerPort, function (err, stdout, stderr) {
+      console.log(stdout);
+      console.log(stderr);
+    }))
+});
 gulp.task('serve', gulp.series(clean, lint, gulp.parallel('build-bundle-dev', watch, test)));
 gulp.task('default', gulp.series(clean, makeWebpackPkg));
 
-gulp.task('e2e-test', gulp.series(clean, setupE2e, gulp.parallel('build-bundle-prod', watch), test))
+gulp.task('e2e-test', gulp.series(clean, setupE2e, 'build-bundle-dev', 'updatepath', gulp.parallel('mockserver', watch, test)));
 // other tasks
 gulp.task(bundleToStdout);
 gulp.task('bundle', gulpBundle.bind(null, false)); // used for just concatenating pre-built files with no build step