test suite fixes

Author: wjakob

README.md

@@ -82,12 +82,12 @@ Also, it requires Clang/LLVM to be installed.
 
 ## Testing
 
-Install package `pytest-xdist`:
+Install the packages `pytest`, `pytest-xdist`, and `flit`:
 ```
-python3 -m pip install pytest-xdist
+python3 -m pip install pytest==7.1.3 pytest-xdist==2.4.0
 ```
 
-Install the library:
+Next, install this project:
 ```
 python3 -m pip install .
 ```

pyproject.toml

@@ -26,8 +26,8 @@ pybind11-mkdoc = "pybind11_mkdoc:main"
 
 [tool.flit.metadata.requires-extra]
 test = [
-    "pytest",
+    "pytest==7.1.3",
     "pybind11",
-    "pytest-xdist",
+    "pytest-xdist==2.4.0",
 ]
 

tests/sample_header_test.py

@@ -27,7 +27,7 @@ def test_generate_headers(capsys):
 
 #define __EXPAND(x)                                      x
 #define __COUNT(_1, _2, _3, _4, _5, _6, _7, COUNT, ...)  COUNT
-#define __VA_SIZE(...)                                   __EXPAND(__COUNT(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1))
+#define __VA_SIZE(...)                                   __EXPAND(__COUNT(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0))
 #define __CAT1(a, b)                                     a ## b
 #define __CAT2(a, b)                                     __CAT1(a, b)
 #define __DOC1(n1)                                       __doc_##n1