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-rw-r--r--Modules/_testcapi/README.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Modules/_testcapi/README.txt b/Modules/_testcapi/README.txt
index 134b6ef..8a65e7a 100644
--- a/Modules/_testcapi/README.txt
+++ b/Modules/_testcapi/README.txt
@@ -1,3 +1,10 @@
Tests in this directory are compiled into the _testcapi extension.
The main file for the extension is Modules/_testcapimodule.c, which
calls `_PyTestCapi_Init_*` from these functions.
+
+General guideline when writing test code for C API.
+* Use Argument Clinic to minimise the amount of boilerplate code.
+* Add a newline between the argument spec and the docstring.
+* If a test description is needed, make sure the added docstring clearly and succinctly describes purpose of the function.
+* DRY, use the clone feature of Argument Clinic.
+* Try to avoid adding new interned strings; reuse existing parameter names if possible. Use the `as` feature of Argument Clinic to override the C variable name, if needed.