From 0cbe4738e5199e005ea78b607412979bbcd59c22 Mon Sep 17 00:00:00 2001
From: Eric Snow <ericsnowcurrently@gmail.com>
Date: Mon, 9 Apr 2018 20:00:11 +0000
Subject: [PATCH] Add a Closeable testing helper.

---
 tests/helpers/__init__.py | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tests/helpers/__init__.py b/tests/helpers/__init__.py
index e69de29b..e1f1ebeb 100644
--- a/tests/helpers/__init__.py
+++ b/tests/helpers/__init__.py
@@ -0,0 +1,30 @@
+
+class Closeable(object):
+
+    def __init__(self):
+        self._closed = False
+
+    def __del__(self):
+        self.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    @property
+    def closed(self):
+        return self._closed
+
+    def close(self):
+        if self._closed:
+            return
+        self._closed = True
+
+        self._close()
+
+    # implemented by subclasses
+
+    def _close(self):
+        raise NotImplementedError