Merge pull request #2 from SUPERCILEX/travis

Fix broken tests!

Author: samtstern

auth/src/test/java/com/firebase/ui/auth/testhelpers/CustomRobolectricGradleTestRunner.java

@@ -30,6 +30,8 @@
 import org.robolectric.res.FileFsFile;
 import org.robolectric.res.FsFile;
 
+import java.io.File;
+
 /**
  * For custom manifest hack, see:
  * https://gist.github.com/venator85/282df3677af9ecac56e5e4b91471cd8f
@@ -67,7 +69,8 @@ protected AndroidManifest getAppManifest(Config config) {
                     getModuleRootPath(config),
                     appManifest.getAndroidManifestFile()
                             .getPath()
-                            .replace("manifests/full", "manifests/aapt"));
+                            .replace("manifests" + File.separator + "full",
+                                     "manifests" + File.separator + "aapt"));
 
             return new AndroidManifest(
                     androidManifestFile,