add option to show details of gas cost for each contract

lib/cmd.js

@@ -189,12 +189,13 @@ class Cmd {
   test() {
     program
       .command('test [file]')
+      .option('-d , --gasDetails', __('When set, will print the gas cost for each contract'))
       .option('--locale [locale]', __('language to use (default: en)'))
       .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'warn')
       .description(__('run tests'))
       .action(function (file, options) {
         i18n.setOrDetectLocale(options.locale);
-        embark.runTests({file, loglevel: options.loglevel});
+        embark.runTests({file, loglevel: options.loglevel, gasDetails: options.gasDetails});
       });
   }
 

lib/tests/reporter.js

@@ -7,12 +7,22 @@ class EmbarkSpec extends Base {
 
     const self = this;
     self.embarkEvents = options.reporterOptions.events;
+    self.gasDetails = options.reporterOptions.gasDetails;
     let indents = 0;
     let n = 0;
     self.stats.gasCost = 0;
 
     function onContractReceipt(receipt) {
       self.stats.gasCost += receipt.gasUsed;
+      if (self.gasDetails) {
+        const fmt = color('bright pass', ' ') +
+          color('green', ' %s') +
+          ' deployed for ' +
+          color('green', '%s') +
+          color('light', ' gas');
+
+        console.log(fmt, receipt.className, receipt.gasUsed);
+      }
     }
 
     self.embarkEvents.on("deploy:contract:receipt", onContractReceipt);
@@ -27,6 +37,9 @@ class EmbarkSpec extends Base {
 
     runner.on('suite', function (suite) {
       ++indents;
+      if (self.gasDetails) {
+        console.log();
+      }
       console.log(color('suite', '%s%s'), indent(), suite.title);
     });
 

lib/tests/run_tests.js

@@ -101,7 +101,7 @@ module.exports = {
       function executeForAllFiles(files, next) {
         async.eachLimit(files, 1, (file, eachCb) => {
           const mocha = new Mocha();
-          mocha.reporter(EmbarkSpec, {events: global.embark.engine.events});
+          mocha.reporter(EmbarkSpec, {events: global.embark.engine.events, gasDetails: options.gasDetails});
           mocha.addFile(file);
 
           mocha.suite.timeout(0);