doctest assumed that a package's __loader__.get_data() method used universal
newlines; it doesn't. To rectify this the string returned replaces all
instances of os.linesep with '\n' to fake universal newline support.
Backport candidate.
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index e2a24c4..e96785c 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -1908,6 +1908,23 @@
>>> suite.run(unittest.TestResult())
<unittest.TestResult run=3 errors=0 failures=3>
+ Support for using a package's __loader__.get_data() is also
+ provided.
+
+ >>> import unittest, pkgutil, test
+ >>> if not hasattr(test, '__loader__'):
+ ... test.__loader__ = pkgutil.get_loader(test)
+ ... added_loader = True
+ >>> try:
+ ... suite = doctest.DocFileSuite('test_doctest.txt',
+ ... 'test_doctest2.txt',
+ ... 'test_doctest4.txt',
+ ... package='test')
+ ... suite.run(unittest.TestResult())
+ ... finally:
+ ... del test.__loader__
+ <unittest.TestResult run=3 errors=0 failures=3>
+
'/' should be used as a path separator. It will be converted
to a native separator at run time: