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1 files changed, 32 insertions, 0 deletions

diff --git a/src/python/stdlib/test/test_pstats.py b/src/python/stdlib/test/test_pstats.py
new file mode 100644
index 0000000..6ad9418
--- /dev/null
+++ b/src/python/stdlib/test/test_pstats.py
@@ -0,0 +1,32 @@
+import unittest
+from test import test_support
+import pstats
+
+
+
+class AddCallersTestCase(unittest.TestCase):
+    """Tests for pstats.add_callers helper."""
+
+    def test_combine_results(self):
+        """pstats.add_callers should combine the call results of both target
+        and source by adding the call time. See issue1269."""
+        # new format: used by the cProfile module
+        target = {"a": (1, 2, 3, 4)}
+        source = {"a": (1, 2, 3, 4), "b": (5, 6, 7, 8)}
+        new_callers = pstats.add_callers(target, source)
+        self.assertEqual(new_callers, {'a': (2, 4, 6, 8), 'b': (5, 6, 7, 8)})
+        # old format: used by the profile module
+        target = {"a": 1}
+        source = {"a": 1, "b": 5}
+        new_callers = pstats.add_callers(target, source)
+        self.assertEqual(new_callers, {'a': 2, 'b': 5})
+
+
+def test_main():
+    test_support.run_unittest(
+        AddCallersTestCase
+    )
+
+
+if __name__ == "__main__":
+    test_main()