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-rw-r--r--tests/basics/string_upperlow.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/basics/string_upperlow.py b/tests/basics/string_upperlow.py
new file mode 100644
index 000000000..950ea24d1
--- /dev/null
+++ b/tests/basics/string_upperlow.py
@@ -0,0 +1,4 @@
+print("".lower())
+print(" t\tn\nr\rv\vf\f".upper())
+print(" T E S T".lower())
+print("*@a1b2cabc_[]/\\".upper())