Bug 1267454 - Allow passing kwargs to the mocked check_output in configure tests. r=glandium

MozReview-Commit-ID: BH3nUUI9nwn

python/mozbuild/mozbuild/test/configure/common.py

@@ -106,6 +106,7 @@ class ConfigureTestSandbox(ConfigureSandbox):
                 CalledProcessError=subprocess.CalledProcessError,
                 check_output=self.check_output,
                 PIPE=subprocess.PIPE,
+                STDOUT=subprocess.STDOUT,
                 Popen=self.Popen,
             )
 
@@ -139,8 +140,8 @@ class ConfigureTestSandbox(ConfigureSandbox):
 
         return Process()
 
-    def check_output(self, args):
-        proc = self.Popen(args)
+    def check_output(self, args, **kwargs):
+        proc = self.Popen(args, **kwargs)
         stdout, stderr = proc.communicate()
         retcode = proc.wait()
         if retcode: