From c6e03d739d3318e67aa8b3eb0df091cbd775ba56 Mon Sep 17 00:00:00 2001
From: Mazz Mosley <mazz@houseofmnowster.com>
Date: Fri, 3 Jul 2015 14:14:47 +0100
Subject: [PATCH] Test self referencing 'file'

When specifying the 'file' key to a value of it's own name, test
that this works and does not cause a false positive circular reference
error.

Signed-off-by: Mazz Mosley <mazz@houseofmnowster.com>
---
 .../fixtures/extends/specify-file-as-self.yml | 16 +++++++++++
 tests/unit/config_test.py                     | 27 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 tests/fixtures/extends/specify-file-as-self.yml

diff --git a/tests/fixtures/extends/specify-file-as-self.yml b/tests/fixtures/extends/specify-file-as-self.yml
new file mode 100644
index 000000000..7e2499762
--- /dev/null
+++ b/tests/fixtures/extends/specify-file-as-self.yml
@@ -0,0 +1,16 @@
+myweb:
+  extends:
+    file: specify-file-as-self.yml
+    service: web
+  environment:
+    - "BAR=1"
+web:
+  extends:
+    file: specify-file-as-self.yml
+    service: otherweb
+  image: busybox
+  environment:
+    - "BAZ=3"
+otherweb:
+  environment:
+    - "YEP=1"
diff --git a/tests/unit/config_test.py b/tests/unit/config_test.py
index 3e9b56c3d..d66b9fbb8 100644
--- a/tests/unit/config_test.py
+++ b/tests/unit/config_test.py
@@ -413,6 +413,33 @@ class ExtendsTest(unittest.TestCase):
             },
         ])
 
+    def test_self_referencing_file(self):
+        """
+        We specify a 'file' key that is the filename we're already in.
+        """
+        service_dicts = load_from_filename('tests/fixtures/extends/specify-file-as-self.yml')
+        self.assertEqual(service_dicts, [
+            {
+                'environment':
+                {
+                    'YEP': '1', 'BAR': '1', 'BAZ': '3'
+                },
+                'image': 'busybox',
+                'name': 'myweb'
+            },
+            {
+                'environment':
+                {'YEP': '1'},
+                'name': 'otherweb'
+            },
+            {
+                'environment':
+                {'YEP': '1', 'BAZ': '3'},
+                'image': 'busybox',
+                'name': 'web'
+            }
+        ])
+
     def test_circular(self):
         try:
             load_from_filename('tests/fixtures/extends/circle-1.yml')