Issue 6822 - Report browser test errors

test_runner.js

Index: test_runner.js
===================================================================
--- a/test_runner.js
+++ b/test_runner.js
@@ -149,32 +149,42 @@
       processes.map(currentProcess =>
         runnerDefinitions[currentProcess](
           bundle, bundleFilename,
           browserFiles.map(
             file => path.relative(path.join(__dirname, "test", "browser"),
                                   file).replace(/\.js$/, "")
           )
         )
-      )
-    )
+        // We need to convert rejected promise to a resolved one
+        // or the test will not let close the webdriver.
+        .catch(e => e)
+    )).then(results =>
+    {
+      let errors = results.filter(e => typeof e != "undefined");
+      if (errors.length)
+        return Promise.reject(`Unit test failed: ${errors.join(", ")}`);
+    })
   );
 }
 
 if (process.argv.length > 2)
   addTestPaths(process.argv.slice(2), true);
 else
 {
   addTestPaths(
     [path.join(__dirname, "test"), path.join(__dirname, "test", "browser")],
     true
   );
 }
 
-Promise.resolve(runBrowserTests(runnerProcesses)).catch(error =>
-{
-  console.error("Failed running browser tests");
-  console.error(error);
-}).then(() =>
+runBrowserTests(runnerProcesses).then(() =>
 {
   if (unitFiles.length)
     nodeunit.reporters.default.run(unitFiles);
+}).catch(error =>
+{
+  if (!error)
+    console.error("Failed running browser tests");
+  else
+    console.error(error);
+  process.exit(1);
 });