Further attempt to make Djna.nosys=true work on AppVeyor

appveyor.yml

@@ -27,9 +27,8 @@ artifacts:
 clone_depth: 1
 test_script:
   - dotnet restore
-  - npm install -g selenium-standalone
+  - npm install selenium-standalone
-  - selenium-standalone install
+  - ps: Start-Process node './start-selenium.js'
-  - ps: Start-Process selenium-standalone 'start','-Djna.nosys=true'
   - ps: Push-Location
   - cd test
   - npm install

test/start-selenium.js

@@ -0,0 +1,30 @@
+var seleniumStandalone = require('selenium-standalone');
+
+var installOptions = {
+    progressCb: function(totalLength, progressLength, chunkLength) {
+        var percent = 100 * progressLength / totalLength;
+        console.log('Installing selenium-standalone: ' + percent.toFixed(0) + '%');
+    }
+};
+
+console.log('Installing selenium-standalone...');
+seleniumStandalone.install(installOptions, function(err) {
+    if (err) {
+        throw err;
+    }
+
+    var startOptions = {
+        javaArgs: ['-Djna.nosys=true'],
+        spawnOptions: { stdio: 'inherit' }
+    };
+
+    console.log('Starting selenium-standalone...');
+    seleniumStandalone.start(startOptions, function(err, seleniumProcess) {
+        if (err) {
+            throw err;
+        }
+
+        console.log('Started Selenium server');
+
+    });
+});