Wrap Selenium in xvfb-run if available

mdk/commands/behat.py

@@ -112,6 +112,22 @@ class BehatCommand(Command):
                 'help': 'outputs the output from selenium in the same window'
             }
         ),
+        (
+            ['-x', '--xvfb'],
+            {
+                'action':   'store_true',
+                'dest':     'xvfb',
+                'help':     'Use XVFB when starting selenium'
+            }
+        ),
+        (
+            ['-X', '--no-xvfb'],
+            {
+                'action':   'store_true',
+                'dest':     'noxvfb',
+                'help':     'Do not use XVFB when starting selenium'
+            }
+        ),
         (
             ['name'],
             {
@@ -223,6 +239,14 @@ def run(self, args):
             if seleniumPath:
                 seleniumCommand = '%s -jar %s' % (self.C.get('java'), seleniumPath)
 
+                usexvfb = ((self.C.get('xvfb') and not args.noxvfb) or
+                          (not self.C.get('xvfb') and args.xvfb and not args.noxvfb))
+                if usexvfb:
+                    xvfbPath = self.C.get('xvfb-run')
+                    seleniumCommand = '%s %s' % (xvfbPath, seleniumCommand)
+                    if not os.path.isfile(xvfbPath):
+                        raise Exception('xvfb-run command could not be found in the specified location %s' % (xvfbPath));
+
             olderThan27 = M.branch_compare(27, '<')
 
             if args.run:

mdk/config-dist.json

@@ -186,6 +186,12 @@
     "lessc": "/usr/local/bin/lessc",
     // Path to shifter
     "shifter": "/usr/bin/shifter",
+    // Path to xvfb-run
+    "xvfb-run": "/usr/bin/xvfb-run",
+
+    // Whether to use xvfb by default
+    "xvfb": false,
+
     // Path to your favourite editor. Set to null to guess it from the System environment.
     "editor": null,