Fix test for user profile in sd-app

QUBES_GPG_DOMAIN will be conditionally set based on the running VM in order to support template consolidation. See freedomofpress/securedrop-client#1141

tests/test_app.py

@@ -11,7 +11,13 @@ def setUp(self):
 
     def test_decrypt_sd_user_profile(self):
         contents = self._get_file_contents("/etc/profile.d/sd-app-qubes-gpg-domain.sh")
-        expected_content = 'export QUBES_GPG_DOMAIN="sd-gpg"\n'
+        expected_content = 'if [ "$(qubesdb-read /name)" = "sd-app" ]; then export QUBES_GPG_DOMAIN="sd-gpg"; fi\n'  # noqa: E501
+        self.assertEqual(contents, expected_content)
+
+    def test_gpg_env_var(self):
+        cmd = 'echo "$QUBES_GPG_DOMAIN"'
+        contents = self._run(cmd)
+        expected_content = "sd-gpg"
         self.assertEqual(contents, expected_content)
 
     def test_open_in_dvm_desktop(self):