From 377be5aa1f097166df91c95670f871959654be3a Mon Sep 17 00:00:00 2001
From: johnharris85 <john@johnharris.io>
Date: Sun, 17 Apr 2016 14:01:06 -0400
Subject: [PATCH] Adding tests Signed-off-by: John Harris <john@johnharris.io>

---
 tests/unit/config/config_test.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tests/unit/config/config_test.py b/tests/unit/config/config_test.py
index 2bbbe6145b..8bf4163265 100644
--- a/tests/unit/config/config_test.py
+++ b/tests/unit/config/config_test.py
@@ -1360,6 +1360,17 @@ class ConfigTest(unittest.TestCase):
             config.load(config_details)
         assert "Service 'one' depends on service 'three'" in exc.exconly()
 
+    def test_linked_service_is_undefined(self):
+        with self.assertRaises(ConfigurationError):
+            config.load(
+                build_config_details({
+                    'version': '2',
+                    'services': {
+                        'web': {'image': 'busybox', 'links': ['db']},
+                    },
+                })
+            )
+
     def test_load_dockerfile_without_context(self):
         config_details = build_config_details({
             'version': '2',