From 20b4c8f3eac1ed9e5b48c6b19c65b405d3646bb7 Mon Sep 17 00:00:00 2001
From: Julia Medina <who.knows.shia@gmail.com>
Date: Fri, 4 Apr 2014 16:38:09 -0300
Subject: [PATCH]  Trial functionality for running tests with pytest

  * Change current dir to tmp dir on each test run
  * Log twisted with test.log
---
 pytest.ini         |  3 +++
 scrapy/conftest.py | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 pytest.ini
 create mode 100644 scrapy/conftest.py

diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 000000000..b845effc9
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,3 @@
+
+[pytest]
+usefixtures = chdir setlog
diff --git a/scrapy/conftest.py b/scrapy/conftest.py
new file mode 100644
index 000000000..e98e9076f
--- /dev/null
+++ b/scrapy/conftest.py
@@ -0,0 +1,39 @@
+
+import pytest
+from twisted.python import log
+
+
+class LogObservers:
+    """Class for keeping track of log observers across test modules"""
+
+    def __init__(self):
+        self.observers = []
+
+    def add(self, logfile='test.log'):
+        fileobj = open(logfile, 'wb')
+        observer = log.FileLogObserver(fileobj)
+        log.startLoggingWithObserver(observer.emit, 0)
+        self.observers.append((fileobj, observer))
+
+    def remove(self):
+        fileobj, observer = self.observers.pop()
+        log.removeObserver(observer.emit)
+        fileobj.close()
+
+
+@pytest.fixture(scope='module')
+def log_observers():
+    return LogObservers()
+
+
+@pytest.fixture()
+def setlog(request, log_observers):
+    """Attach test.log file observer to twisted log, for trial compatibility"""
+    log_observers.add()
+    request.addfinalizer(log_observers.remove)
+
+
+@pytest.fixture()
+def chdir(tmpdir):
+    """Change to pytest-provided temporary directory"""
+    tmpdir.chdir()