simple unit test for logger (log a line, verify the line)

tests/test_logger.py

@@ -0,0 +1,51 @@
+import logging
+import uuid
+
+from zipline.utils.logger import configure_logging
+from unittest2 import TestCase
+
+
+
+class LoggerTestCase(TestCase):
+
+    def setUp(self):
+       configure_logging()
+       self.LOG = logging.getLogger("ZiplineLogger")
+
+    def test_log(self):
+        import nose.tools; nose.tools.set_trace()
+        test_msg = uuid.uuid1().hex
+        self.LOG.info(test_msg)
+        logfile = open('/var/log/zipline/zipline.log','r')
+        last_line = tail(logfile)
+        logged_msg = last_line.split(" - ")[1]
+        self.assertEqual(test_msg, logged_msg)
+
+def tail( f, window=20 ):
+    """
+    from
+    http://stackoverflow.com/questions/136168/get-last-n-lines-of-a-file- \
+            with-python-similar-to-tail
+    """
+    BUFSIZ = 1024
+    f.seek(0, 2)
+    bytes = f.tell()
+    size = window
+    block = -1
+    data = []
+    while size > 0 and bytes > 0:
+        if (bytes - BUFSIZ > 0):
+            # Seek back one whole BUFSIZ
+            f.seek(block*BUFSIZ, 2)
+            # read BUFFER
+            data.append(f.read(BUFSIZ))
+        else:
+            # file too small, start from begining
+            f.seek(0,0)
+            # only read what was not read
+            data.append(f.read(bytes))
+        linesFound = data[-1].count('\n')
+        size -= linesFound
+        bytes -= BUFSIZ
+        block -= 1
+    return '\n'.join(''.join(data).splitlines()[-window:])