added command

package.json

@@ -139,7 +139,6 @@
     "ethereumjs-tx": "^2.1.2",
     "ethereumjs-vm": "4.1.3",
     "http-server": "^0.11.1",
-    "npm-install-version": "^6.0.2",
     "time-stamp": "^2.2.0",
     "winston": "^3.3.3"
   },
@@ -221,6 +220,7 @@
     "nanohtml": "^1.6.3",
     "nightwatch": "^1.3.5",
     "notify-error": "^1.2.0",
+    "npm-install-version": "^6.0.2",
     "npm-link-local": "^1.1.0",
     "npm-merge-driver": "^2.3.5",
     "npm-run-all": "^4.0.2",

test-browser/commands/noWorkerErrorFor.js

+const EventEmitter = require('events')
+
+class NoWorkerErrorFor extends EventEmitter {
+  command (version, content) {
+    this.api.perform((done) => {
+      noWorkerErrorFor(this.api, version, content, () => {
+        done()
+        this.emit('complete')
+      })
+    })
+    return this
+  }
+}
+
+function noWorkerErrorFor (browser, version, done) {
+  browser
+    .clickLaunchIcon('solidity')
+    .setSolidityCompilerVersion(version)
+    .waitForElementPresent('*[data-id="compiledErrors"]')
+    .notContainsText('*[data-id="compiledErrors"]', 'worker error:undefined')
+    .notContainsText('*[data-id="compiledErrors"]', 'Uncaught RangeError: Maximum call stack size exceeded')
+    .notContainsText('*[data-id="compiledErrors"]', 'RangeError: Maximum call stack size exceeded')
+    .perform(function (done) {
+      done()
+    })
+}
+
+module.exports = NoWorkerErrorFor