Generate stable output when running tests: patch localtime

Author: florentx

tests/testasciidoc.py

@@ -22,6 +22,7 @@
 
 
 import os, sys, re, difflib
+import time
 
 if sys.platform[:4] == 'java':
     # Jython cStringIO is more compatible with CPython StringIO.
@@ -75,6 +76,28 @@ def normalize_data(lines):
     return result
 
 
+def mock_localtime(f, _localtime=time.localtime):
+    """Mock time module to generate stable output."""
+    _frozentime = 0X3DE170D6
+    _frozentz = 'Pacific/Auckland'
+
+    def _fake_localtime(t=_frozentime + 1):
+        assert t > _frozentime, 'File created before first public release'
+        return _localtime(_frozentime)
+
+    def generate_expected(self, backend):
+        time.localtime = _fake_localtime
+        os.environ['TZ'] = _frozentz
+        time.tzset()
+        try:
+            return f(self, backend)
+        finally:
+            time.localtime = _localtime
+            del os.environ['TZ']
+            time.tzset()
+    return generate_expected
+
+
 class AsciiDocTest(object):
 
     def __init__(self):
@@ -172,6 +195,7 @@ def get_expected(self, backend):
             f.close()
         return result
 
+    @mock_localtime
     def generate_expected(self, backend):
         """
         Generate and return test data output for backend.