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-rw-r--r--Lib/test/string_tests.py12
1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py
index 4b2f0e3..5c8dd93 100644
--- a/Lib/test/string_tests.py
+++ b/Lib/test/string_tests.py
@@ -163,6 +163,18 @@ def run_method_tests(test):
test('rstrip', ' hello ', ' hello')
test('strip', 'hello', 'hello')
+ # strip/lstrip/rstrip with None arg
+ test('strip', ' hello ', 'hello', None)
+ test('lstrip', ' hello ', 'hello ', None)
+ test('rstrip', ' hello ', ' hello', None)
+ test('strip', 'hello', 'hello', None)
+
+ # strip/lstrip/rstrip with real arg
+ test('strip', 'xyzzyhelloxyzzy', 'hello', 'xyz')
+ test('lstrip', 'xyzzyhelloxyzzy', 'helloxyzzy', 'xyz')
+ test('rstrip', 'xyzzyhelloxyzzy', 'xyzzyhello', 'xyz')
+ test('strip', 'hello', 'hello', 'xyz')
+
test('swapcase', 'HeLLo cOmpUteRs', 'hEllO CoMPuTErS')
test('translate', 'xyzabcdef', 'xyzxyz', transtable, 'def')