gh-93649: Split getargs tests from _testcapimodule.c (#99346)

2 files changed, 921 insertions, 0 deletions

diff --git a/Modules/_testcapi/getargs.c b/Modules/_testcapi/getargs.c
new file mode 100644
index 0000000..25a8e5f
--- /dev/null
+++ b/Modules/_testcapi/getargs.c
@@ -0,0 +1,920 @@
+/*
+ * Tests for Python/getargs.c and Python/modsupport.c;
+ * APIs that parse and build arguments.
+ */
+
+#define PY_SSIZE_T_CLEAN
+
+#include "parts.h"
+
+static PyObject *
+parse_tuple_and_keywords(PyObject *self, PyObject *args)
+{
+    PyObject *sub_args;
+    PyObject *sub_kwargs;
+    const char *sub_format;
+    PyObject *sub_keywords;
+
+    double buffers[8][4]; /* double ensures alignment where necessary */
+    PyObject *converted[8];
+    char *keywords[8 + 1]; /* space for NULL at end */
+
+    PyObject *return_value = NULL;
+
+    if (!PyArg_ParseTuple(args, "OOsO:parse_tuple_and_keywords",
+                          &sub_args, &sub_kwargs, &sub_format, &sub_keywords))
+    {
+        return NULL;
+    }
+
+    if (!(PyList_CheckExact(sub_keywords) ||
+        PyTuple_CheckExact(sub_keywords)))
+    {
+        PyErr_SetString(PyExc_ValueError,
+            "parse_tuple_and_keywords: "
+            "sub_keywords must be either list or tuple");
+        return NULL;
+    }
+
+    memset(buffers, 0, sizeof(buffers));
+    memset(converted, 0, sizeof(converted));
+    memset(keywords, 0, sizeof(keywords));
+
+    Py_ssize_t size = PySequence_Fast_GET_SIZE(sub_keywords);
+    if (size > 8) {
+        PyErr_SetString(PyExc_ValueError,
+            "parse_tuple_and_keywords: too many keywords in sub_keywords");
+        goto exit;
+    }
+
+    for (Py_ssize_t i = 0; i < size; i++) {
+        PyObject *o = PySequence_Fast_GET_ITEM(sub_keywords, i);
+        if (!PyUnicode_FSConverter(o, (void *)(converted + i))) {
+            PyErr_Format(PyExc_ValueError,
+                "parse_tuple_and_keywords: "
+                "could not convert keywords[%zd] to narrow string", i);
+            goto exit;
+        }
+        keywords[i] = PyBytes_AS_STRING(converted[i]);
+    }
+
+    int result = PyArg_ParseTupleAndKeywords(sub_args, sub_kwargs,
+        sub_format, keywords,
+        buffers + 0, buffers + 1, buffers + 2, buffers + 3,
+        buffers + 4, buffers + 5, buffers + 6, buffers + 7);
+
+    if (result) {
+        return_value = Py_NewRef(Py_None);
+    }
+
+exit:
+    size = sizeof(converted) / sizeof(converted[0]);
+    for (Py_ssize_t i = 0; i < size; i++) {
+        Py_XDECREF(converted[i]);
+    }
+    return return_value;
+}
+
+static PyObject *
+get_args(PyObject *self, PyObject *args)
+{
+    if (args == NULL) {
+        args = Py_None;
+    }
+    return Py_NewRef(args);
+}
+
+static PyObject *
+get_kwargs(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    if (kwargs == NULL) {
+        kwargs = Py_None;
+    }
+    return Py_NewRef(kwargs);
+}
+
+static PyObject *
+getargs_w_star(PyObject *self, PyObject *args)
+{
+    Py_buffer buffer;
+
+    if (!PyArg_ParseTuple(args, "w*:getargs_w_star", &buffer)) {
+        return NULL;
+    }
+
+    if (2 <= buffer.len) {
+        char *str = buffer.buf;
+        str[0] = '[';
+        str[buffer.len-1] = ']';
+    }
+
+    PyObject *result = PyBytes_FromStringAndSize(buffer.buf, buffer.len);
+    PyBuffer_Release(&buffer);
+    return result;
+}
+
+static PyObject *
+test_empty_argparse(PyObject *self, PyObject *Py_UNUSED(ignored))
+{
+    /* Test that formats can begin with '|'. See issue #4720. */
+    PyObject *dict = NULL;
+    static char *kwlist[] = {NULL};
+    PyObject *tuple = PyTuple_New(0);
+    if (!tuple) {
+        return NULL;
+    }
+    int result;
+    if (!(result = PyArg_ParseTuple(tuple, "|:test_empty_argparse"))) {
+        goto done;
+    }
+    dict = PyDict_New();
+    if (!dict) {
+        goto done;
+    }
+    result = PyArg_ParseTupleAndKeywords(tuple, dict, "|:test_empty_argparse",
+                                         kwlist);
+  done:
+    Py_DECREF(tuple);
+    Py_XDECREF(dict);
+    if (!result) {
+        return NULL;
+    }
+    Py_RETURN_NONE;
+}
+
+/* Test tuple argument processing */
+static PyObject *
+getargs_tuple(PyObject *self, PyObject *args)
+{
+    int a, b, c;
+    if (!PyArg_ParseTuple(args, "i(ii)", &a, &b, &c)) {
+        return NULL;
+    }
+    return Py_BuildValue("iii", a, b, c);
+}
+
+/* test PyArg_ParseTupleAndKeywords */
+static PyObject *
+getargs_keywords(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    static char *keywords[] = {"arg1","arg2","arg3","arg4","arg5", NULL};
+    static const char fmt[] = "(ii)i|(i(ii))(iii)i";
+    int int_args[10] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, fmt, keywords,
+        &int_args[0], &int_args[1], &int_args[2], &int_args[3], &int_args[4],
+        &int_args[5], &int_args[6], &int_args[7], &int_args[8], &int_args[9]))
+    {
+        return NULL;
+    }
+    return Py_BuildValue("iiiiiiiiii",
+        int_args[0], int_args[1], int_args[2], int_args[3], int_args[4],
+        int_args[5], int_args[6], int_args[7], int_args[8], int_args[9]);
+}
+
+/* test PyArg_ParseTupleAndKeywords keyword-only arguments */
+static PyObject *
+getargs_keyword_only(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    static char *keywords[] = {"required", "optional", "keyword_only", NULL};
+    int required = -1;
+    int optional = -1;
+    int keyword_only = -1;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i|i$i", keywords,
+                                     &required, &optional, &keyword_only))
+    {
+        return NULL;
+    }
+    return Py_BuildValue("iii", required, optional, keyword_only);
+}
+
+/* test PyArg_ParseTupleAndKeywords positional-only arguments */
+static PyObject *
+getargs_positional_only_and_keywords(PyObject *self, PyObject *args,
+                                     PyObject *kwargs)
+{
+    static char *keywords[] = {"", "", "keyword", NULL};
+    int required = -1;
+    int optional = -1;
+    int keyword = -1;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i|ii", keywords,
+                                     &required, &optional, &keyword))
+    {
+        return NULL;
+    }
+    return Py_BuildValue("iii", required, optional, keyword);
+}
+
+/* Functions to call PyArg_ParseTuple with integer format codes,
+   and return the result.
+*/
+static PyObject *
+getargs_b(PyObject *self, PyObject *args)
+{
+    unsigned char value;
+    if (!PyArg_ParseTuple(args, "b", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLong((unsigned long)value);
+}
+
+static PyObject *
+getargs_B(PyObject *self, PyObject *args)
+{
+    unsigned char value;
+    if (!PyArg_ParseTuple(args, "B", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLong((unsigned long)value);
+}
+
+static PyObject *
+getargs_h(PyObject *self, PyObject *args)
+{
+    short value;
+    if (!PyArg_ParseTuple(args, "h", &value)) {
+        return NULL;
+    }
+    return PyLong_FromLong((long)value);
+}
+
+static PyObject *
+getargs_H(PyObject *self, PyObject *args)
+{
+    unsigned short value;
+    if (!PyArg_ParseTuple(args, "H", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLong((unsigned long)value);
+}
+
+static PyObject *
+getargs_I(PyObject *self, PyObject *args)
+{
+    unsigned int value;
+    if (!PyArg_ParseTuple(args, "I", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLong((unsigned long)value);
+}
+
+static PyObject *
+getargs_k(PyObject *self, PyObject *args)
+{
+    unsigned long value;
+    if (!PyArg_ParseTuple(args, "k", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLong(value);
+}
+
+static PyObject *
+getargs_i(PyObject *self, PyObject *args)
+{
+    int value;
+    if (!PyArg_ParseTuple(args, "i", &value)) {
+        return NULL;
+    }
+    return PyLong_FromLong((long)value);
+}
+
+static PyObject *
+getargs_l(PyObject *self, PyObject *args)
+{
+    long value;
+    if (!PyArg_ParseTuple(args, "l", &value)) {
+        return NULL;
+    }
+    return PyLong_FromLong(value);
+}
+
+static PyObject *
+getargs_n(PyObject *self, PyObject *args)
+{
+    Py_ssize_t value;
+    if (!PyArg_ParseTuple(args, "n", &value)) {
+        return NULL;
+    }
+    return PyLong_FromSsize_t(value);
+}
+
+static PyObject *
+getargs_p(PyObject *self, PyObject *args)
+{
+    int value;
+    if (!PyArg_ParseTuple(args, "p", &value)) {
+        return NULL;
+    }
+    return PyLong_FromLong(value);
+}
+
+static PyObject *
+getargs_L(PyObject *self, PyObject *args)
+{
+    long long value;
+    if (!PyArg_ParseTuple(args, "L", &value)) {
+        return NULL;
+    }
+    return PyLong_FromLongLong(value);
+}
+
+static PyObject *
+getargs_K(PyObject *self, PyObject *args)
+{
+    unsigned long long value;
+    if (!PyArg_ParseTuple(args, "K", &value)) {
+        return NULL;
+    }
+    return PyLong_FromUnsignedLongLong(value);
+}
+
+/* This function not only tests the 'k' getargs code, but also the
+   PyLong_AsUnsignedLongMask() function. */
+static PyObject *
+test_k_code(PyObject *self, PyObject *Py_UNUSED(ignored))
+{
+    PyObject *tuple, *num;
+    unsigned long value;
+
+    tuple = PyTuple_New(1);
+    if (tuple == NULL) {
+        return NULL;
+    }
+
+    /* a number larger than ULONG_MAX even on 64-bit platforms */
+    num = PyLong_FromString("FFFFFFFFFFFFFFFFFFFFFFFF", NULL, 16);
+    if (num == NULL) {
+        return NULL;
+    }
+
+    value = PyLong_AsUnsignedLongMask(num);
+    if (value != ULONG_MAX) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_k_code: "
+            "PyLong_AsUnsignedLongMask() returned wrong value for long 0xFFF...FFF");
+        return NULL;
+    }
+
+    PyTuple_SET_ITEM(tuple, 0, num);
+
+    value = 0;
+    if (!PyArg_ParseTuple(tuple, "k:test_k_code", &value)) {
+        return NULL;
+    }
+    if (value != ULONG_MAX) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_k_code: k code returned wrong value for long 0xFFF...FFF");
+        return NULL;
+    }
+
+    Py_DECREF(num);
+    num = PyLong_FromString("-FFFFFFFF000000000000000042", NULL, 16);
+    if (num == NULL) {
+        return NULL;
+    }
+
+    value = PyLong_AsUnsignedLongMask(num);
+    if (value != (unsigned long)-0x42) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_k_code: "
+            "PyLong_AsUnsignedLongMask() returned wrong value for long -0xFFF..000042");
+        return NULL;
+    }
+
+    PyTuple_SET_ITEM(tuple, 0, num);
+
+    value = 0;
+    if (!PyArg_ParseTuple(tuple, "k:test_k_code", &value)) {
+        return NULL;
+    }
+    if (value != (unsigned long)-0x42) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_k_code: k code returned wrong value for long -0xFFF..000042");
+        return NULL;
+    }
+
+    Py_DECREF(tuple);
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_f(PyObject *self, PyObject *args)
+{
+    float f;
+    if (!PyArg_ParseTuple(args, "f", &f)) {
+        return NULL;
+    }
+    return PyFloat_FromDouble(f);
+}
+
+static PyObject *
+getargs_d(PyObject *self, PyObject *args)
+{
+    double d;
+    if (!PyArg_ParseTuple(args, "d", &d)) {
+        return NULL;
+    }
+    return PyFloat_FromDouble(d);
+}
+
+static PyObject *
+getargs_D(PyObject *self, PyObject *args)
+{
+    Py_complex cval;
+    if (!PyArg_ParseTuple(args, "D", &cval)) {
+        return NULL;
+    }
+    return PyComplex_FromCComplex(cval);
+}
+
+static PyObject *
+getargs_S(PyObject *self, PyObject *args)
+{
+    PyObject *obj;
+    if (!PyArg_ParseTuple(args, "S", &obj)) {
+        return NULL;
+    }
+    return Py_NewRef(obj);
+}
+
+static PyObject *
+getargs_Y(PyObject *self, PyObject *args)
+{
+    PyObject *obj;
+    if (!PyArg_ParseTuple(args, "Y", &obj)) {
+        return NULL;
+    }
+    return Py_NewRef(obj);
+}
+
+static PyObject *
+getargs_U(PyObject *self, PyObject *args)
+{
+    PyObject *obj;
+    if (!PyArg_ParseTuple(args, "U", &obj)) {
+        return NULL;
+    }
+    return Py_NewRef(obj);
+}
+
+static PyObject *
+getargs_c(PyObject *self, PyObject *args)
+{
+    char c;
+    if (!PyArg_ParseTuple(args, "c", &c)) {
+        return NULL;
+    }
+    return PyLong_FromLong((unsigned char)c);
+}
+
+static PyObject *
+getargs_C(PyObject *self, PyObject *args)
+{
+    int c;
+    if (!PyArg_ParseTuple(args, "C", &c)) {
+        return NULL;
+    }
+    return PyLong_FromLong(c);
+}
+
+static PyObject *
+getargs_s(PyObject *self, PyObject *args)
+{
+    char *str;
+    if (!PyArg_ParseTuple(args, "s", &str)) {
+        return NULL;
+    }
+    return PyBytes_FromString(str);
+}
+
+static PyObject *
+getargs_s_star(PyObject *self, PyObject *args)
+{
+    Py_buffer buffer;
+    PyObject *bytes;
+    if (!PyArg_ParseTuple(args, "s*", &buffer)) {
+        return NULL;
+    }
+    bytes = PyBytes_FromStringAndSize(buffer.buf, buffer.len);
+    PyBuffer_Release(&buffer);
+    return bytes;
+}
+
+static PyObject *
+getargs_s_hash(PyObject *self, PyObject *args)
+{
+    char *str;
+    Py_ssize_t size;
+    if (!PyArg_ParseTuple(args, "s#", &str, &size)) {
+        return NULL;
+    }
+    return PyBytes_FromStringAndSize(str, size);
+}
+
+static PyObject *
+getargs_z(PyObject *self, PyObject *args)
+{
+    char *str;
+    if (!PyArg_ParseTuple(args, "z", &str)) {
+        return NULL;
+    }
+    if (str != NULL) {
+        return PyBytes_FromString(str);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_z_star(PyObject *self, PyObject *args)
+{
+    Py_buffer buffer;
+    PyObject *bytes;
+    if (!PyArg_ParseTuple(args, "z*", &buffer)) {
+        return NULL;
+    }
+    if (buffer.buf != NULL) {
+        bytes = PyBytes_FromStringAndSize(buffer.buf, buffer.len);
+    }
+    else {
+        bytes = Py_NewRef(Py_None);
+    }
+    PyBuffer_Release(&buffer);
+    return bytes;
+}
+
+static PyObject *
+getargs_z_hash(PyObject *self, PyObject *args)
+{
+    char *str;
+    Py_ssize_t size;
+    if (!PyArg_ParseTuple(args, "z#", &str, &size)) {
+        return NULL;
+    }
+    if (str != NULL) {
+        return PyBytes_FromStringAndSize(str, size);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_y(PyObject *self, PyObject *args)
+{
+    char *str;
+    if (!PyArg_ParseTuple(args, "y", &str)) {
+        return NULL;
+    }
+    return PyBytes_FromString(str);
+}
+
+static PyObject *
+getargs_y_star(PyObject *self, PyObject *args)
+{
+    Py_buffer buffer;
+    if (!PyArg_ParseTuple(args, "y*", &buffer)) {
+        return NULL;
+    }
+    PyObject *bytes = PyBytes_FromStringAndSize(buffer.buf, buffer.len);
+    PyBuffer_Release(&buffer);
+    return bytes;
+}
+
+static PyObject *
+getargs_y_hash(PyObject *self, PyObject *args)
+{
+    char *str;
+    Py_ssize_t size;
+    if (!PyArg_ParseTuple(args, "y#", &str, &size)) {
+        return NULL;
+    }
+    return PyBytes_FromStringAndSize(str, size);
+}
+
+static PyObject *
+getargs_u(PyObject *self, PyObject *args)
+{
+    Py_UNICODE *str;
+    if (!PyArg_ParseTuple(args, "u", &str)) {
+        return NULL;
+    }
+    return PyUnicode_FromWideChar(str, -1);
+}
+
+static PyObject *
+getargs_u_hash(PyObject *self, PyObject *args)
+{
+    Py_UNICODE *str;
+    Py_ssize_t size;
+    if (!PyArg_ParseTuple(args, "u#", &str, &size)) {
+        return NULL;
+    }
+    return PyUnicode_FromWideChar(str, size);
+}
+
+static PyObject *
+getargs_Z(PyObject *self, PyObject *args)
+{
+    Py_UNICODE *str;
+    if (!PyArg_ParseTuple(args, "Z", &str)) {
+        return NULL;
+    }
+    if (str != NULL) {
+        return PyUnicode_FromWideChar(str, -1);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_Z_hash(PyObject *self, PyObject *args)
+{
+    Py_UNICODE *str;
+    Py_ssize_t size;
+    if (!PyArg_ParseTuple(args, "Z#", &str, &size)) {
+        return NULL;
+    }
+    if (str != NULL) {
+        return PyUnicode_FromWideChar(str, size);
+    }
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_es(PyObject *self, PyObject *args)
+{
+    PyObject *arg;
+    const char *encoding = NULL;
+    char *str;
+
+    if (!PyArg_ParseTuple(args, "O|s", &arg, &encoding)) {
+        return NULL;
+    }
+    if (!PyArg_Parse(arg, "es", encoding, &str)) {
+        return NULL;
+    }
+    PyObject *result = PyBytes_FromString(str);
+    PyMem_Free(str);
+    return result;
+}
+
+static PyObject *
+getargs_et(PyObject *self, PyObject *args)
+{
+    PyObject *arg;
+    const char *encoding = NULL;
+    char *str;
+
+    if (!PyArg_ParseTuple(args, "O|s", &arg, &encoding)) {
+        return NULL;
+    }
+    if (!PyArg_Parse(arg, "et", encoding, &str)) {
+        return NULL;
+    }
+    PyObject *result = PyBytes_FromString(str);
+    PyMem_Free(str);
+    return result;
+}
+
+static PyObject *
+getargs_es_hash(PyObject *self, PyObject *args)
+{
+    PyObject *arg;
+    const char *encoding = NULL;
+    PyByteArrayObject *buffer = NULL;
+    char *str = NULL;
+    Py_ssize_t size;
+
+    if (!PyArg_ParseTuple(args, "O|sY", &arg, &encoding, &buffer)) {
+        return NULL;
+    }
+    if (buffer != NULL) {
+        str = PyByteArray_AS_STRING(buffer);
+        size = PyByteArray_GET_SIZE(buffer);
+    }
+    if (!PyArg_Parse(arg, "es#", encoding, &str, &size)) {
+        return NULL;
+    }
+    PyObject *result = PyBytes_FromStringAndSize(str, size);
+    if (buffer == NULL) {
+        PyMem_Free(str);
+    }
+    return result;
+}
+
+static PyObject *
+getargs_et_hash(PyObject *self, PyObject *args)
+{
+    PyObject *arg;
+    const char *encoding = NULL;
+    PyByteArrayObject *buffer = NULL;
+    char *str = NULL;
+    Py_ssize_t size;
+
+    if (!PyArg_ParseTuple(args, "O|sY", &arg, &encoding, &buffer)) {
+        return NULL;
+    }
+    if (buffer != NULL) {
+        str = PyByteArray_AS_STRING(buffer);
+        size = PyByteArray_GET_SIZE(buffer);
+    }
+    if (!PyArg_Parse(arg, "et#", encoding, &str, &size)) {
+        return NULL;
+    }
+    PyObject *result = PyBytes_FromStringAndSize(str, size);
+    if (buffer == NULL) {
+        PyMem_Free(str);
+    }
+    return result;
+}
+
+/* Test the L code for PyArg_ParseTuple.  This should deliver a long long
+   for both long and int arguments.  The test may leak a little memory if
+   it fails.
+*/
+static PyObject *
+test_L_code(PyObject *self, PyObject *Py_UNUSED(ignored))
+{
+    PyObject *tuple, *num;
+    long long value;
+
+    tuple = PyTuple_New(1);
+    if (tuple == NULL) {
+        return NULL;
+    }
+
+    num = PyLong_FromLong(42);
+    if (num == NULL) {
+        return NULL;
+    }
+
+    PyTuple_SET_ITEM(tuple, 0, num);
+
+    value = -1;
+    if (!PyArg_ParseTuple(tuple, "L:test_L_code", &value)) {
+        return NULL;
+    }
+    if (value != 42) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_L_code: L code returned wrong value for long 42");
+        return NULL;
+    }
+
+    Py_DECREF(num);
+    num = PyLong_FromLong(42);
+    if (num == NULL) {
+        return NULL;
+    }
+
+    PyTuple_SET_ITEM(tuple, 0, num);
+
+    value = -1;
+    if (!PyArg_ParseTuple(tuple, "L:test_L_code", &value)) {
+        return NULL;
+    }
+    if (value != 42) {
+        PyErr_SetString(PyExc_AssertionError,
+            "test_L_code: L code returned wrong value for int 42");
+        return NULL;
+    }
+
+    Py_DECREF(tuple);
+    Py_RETURN_NONE;
+}
+
+/* Test the s and z codes for PyArg_ParseTuple.
+*/
+static PyObject *
+test_s_code(PyObject *self, PyObject *Py_UNUSED(ignored))
+{
+    /* Unicode strings should be accepted */
+    PyObject *tuple = PyTuple_New(1);
+    if (tuple == NULL) {
+        return NULL;
+    }
+
+    PyObject *obj = PyUnicode_Decode("t\xeate", strlen("t\xeate"),
+                                     "latin-1", NULL);
+    if (obj == NULL) {
+        return NULL;
+    }
+
+    PyTuple_SET_ITEM(tuple, 0, obj);
+
+    /* These two blocks used to raise a TypeError:
+     * "argument must be string without null bytes, not str"
+     */
+    char *value;
+    if (!PyArg_ParseTuple(tuple, "s:test_s_code1", &value)) {
+        return NULL;
+    }
+
+    if (!PyArg_ParseTuple(tuple, "z:test_s_code2", &value)) {
+        return NULL;
+    }
+
+    Py_DECREF(tuple);
+    Py_RETURN_NONE;
+}
+
+#undef PyArg_ParseTupleAndKeywords
+PyAPI_FUNC(int) PyArg_ParseTupleAndKeywords(PyObject *, PyObject *,
+                                            const char *, char **, ...);
+
+static PyObject *
+getargs_s_hash_int(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    static char *keywords[] = {"", "", "x", NULL};
+    Py_buffer buf = {NULL};
+    const char *s;
+    int len;
+    int i = 0;
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "w*|s#i", keywords,
+                                     &buf, &s, &len, &i))
+    {
+        return NULL;
+    }
+    PyBuffer_Release(&buf);
+    Py_RETURN_NONE;
+}
+
+static PyObject *
+getargs_s_hash_int2(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    static char *keywords[] = {"", "", "x", NULL};
+    Py_buffer buf = {NULL};
+    const char *s;
+    int len;
+    int i = 0;
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "w*|(s#)i", keywords,
+                                     &buf, &s, &len, &i))
+    {
+        return NULL;
+    }
+    PyBuffer_Release(&buf);
+    Py_RETURN_NONE;
+}
+
+static PyMethodDef test_methods[] = {
+    {"get_args",                get_args,                        METH_VARARGS},
+    {"get_kwargs", _PyCFunction_CAST(get_kwargs), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_B",               getargs_B,                       METH_VARARGS},
+    {"getargs_C",               getargs_C,                       METH_VARARGS},
+    {"getargs_D",               getargs_D,                       METH_VARARGS},
+    {"getargs_H",               getargs_H,                       METH_VARARGS},
+    {"getargs_I",               getargs_I,                       METH_VARARGS},
+    {"getargs_K",               getargs_K,                       METH_VARARGS},
+    {"getargs_L",               getargs_L,                       METH_VARARGS},
+    {"getargs_S",               getargs_S,                       METH_VARARGS},
+    {"getargs_U",               getargs_U,                       METH_VARARGS},
+    {"getargs_Y",               getargs_Y,                       METH_VARARGS},
+    {"getargs_Z",               getargs_Z,                       METH_VARARGS},
+    {"getargs_Z_hash",          getargs_Z_hash,                  METH_VARARGS},
+    {"getargs_b",               getargs_b,                       METH_VARARGS},
+    {"getargs_c",               getargs_c,                       METH_VARARGS},
+    {"getargs_d",               getargs_d,                       METH_VARARGS},
+    {"getargs_es",              getargs_es,                      METH_VARARGS},
+    {"getargs_es_hash",         getargs_es_hash,                 METH_VARARGS},
+    {"getargs_et",              getargs_et,                      METH_VARARGS},
+    {"getargs_et_hash",         getargs_et_hash,                 METH_VARARGS},
+    {"getargs_f",               getargs_f,                       METH_VARARGS},
+    {"getargs_h",               getargs_h,                       METH_VARARGS},
+    {"getargs_i",               getargs_i,                       METH_VARARGS},
+    {"getargs_k",               getargs_k,                       METH_VARARGS},
+    {"getargs_keyword_only", _PyCFunction_CAST(getargs_keyword_only), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_keywords", _PyCFunction_CAST(getargs_keywords), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_l",               getargs_l,                       METH_VARARGS},
+    {"getargs_n",               getargs_n,                       METH_VARARGS},
+    {"getargs_p",               getargs_p,                       METH_VARARGS},
+    {"getargs_positional_only_and_keywords", _PyCFunction_CAST(getargs_positional_only_and_keywords), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_s",               getargs_s,                       METH_VARARGS},
+    {"getargs_s_hash",          getargs_s_hash,                  METH_VARARGS},
+    {"getargs_s_hash_int", _PyCFunction_CAST(getargs_s_hash_int), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_s_hash_int2", _PyCFunction_CAST(getargs_s_hash_int2), METH_VARARGS|METH_KEYWORDS},
+    {"getargs_s_star",          getargs_s_star,                  METH_VARARGS},
+    {"getargs_tuple",           getargs_tuple,                   METH_VARARGS},
+    {"getargs_u",               getargs_u,                       METH_VARARGS},
+    {"getargs_u_hash",          getargs_u_hash,                  METH_VARARGS},
+    {"getargs_w_star",          getargs_w_star,                  METH_VARARGS},
+    {"getargs_y",               getargs_y,                       METH_VARARGS},
+    {"getargs_y_hash",          getargs_y_hash,                  METH_VARARGS},
+    {"getargs_y_star",          getargs_y_star,                  METH_VARARGS},
+    {"getargs_z",               getargs_z,                       METH_VARARGS},
+    {"getargs_z_hash",          getargs_z_hash,                  METH_VARARGS},
+    {"getargs_z_star",          getargs_z_star,                  METH_VARARGS},
+    {"parse_tuple_and_keywords", parse_tuple_and_keywords,       METH_VARARGS},
+    {"test_L_code",             test_L_code,                     METH_NOARGS},
+    {"test_empty_argparse",     test_empty_argparse,             METH_NOARGS},
+    {"test_k_code",             test_k_code,                     METH_NOARGS},
+    {"test_s_code",             test_s_code,                     METH_NOARGS},
+    {NULL},
+};
+
+int
+_PyTestCapi_Init_GetArgs(PyObject *mod)
+{
+    if (PyModule_AddFunctions(mod, test_methods) < 0) {
+        return -1;
+    }
+
+    return 0;
+}
diff --git a/Modules/_testcapi/parts.h b/Modules/_testcapi/parts.h
index 304e592..25ee0f7 100644
--- a/Modules/_testcapi/parts.h
+++ b/Modules/_testcapi/parts.h
@@ -27,6 +27,7 @@
 int _PyTestCapi_Init_Vectorcall(PyObject *module);
 int _PyTestCapi_Init_Heaptype(PyObject *module);
 int _PyTestCapi_Init_Unicode(PyObject *module);
+int _PyTestCapi_Init_GetArgs(PyObject *module);
 
 #ifdef LIMITED_API_AVAILABLE
 int _PyTestCapi_Init_VectorcallLimited(PyObject *module);