bpo-36782: Created C API wrappers and added missing tests for functions in the PyDateTimeAPI. (#13088)

* created a c API wrapper for pyDate_FromDate and added the test

* 📜🤖 Added by blurb_it.

* fixed auto-alignment by vscode

* made changes as per PEP7

* Update 2019-05-04-21-25-19.bpo-36782.h3oPIb.rst

* Refactored code as per requested changes

* Remove Whitespace to Fix failed travis build

* Update 2019-05-04-21-25-19.bpo-36782.h3oPIb.rst

* Add a new line at end of ACKS

* Added C API function for PyDateTime_FromDateAndTime

* Added a test for the C API wrapper of PyDateTime_FromDateAndTime

* Added C API function for PyDateTime_FromDateAndTime

* Added a test for the C API wrapper of PyDateTime_FromDateAndTimeAndFold

* Remove Whitespace using patchcheck

* Added a C API function for PyTime_FromTime

* Added a test for the C API wrapper of PyTime_FromTime

* Added a C API function for PyTime_FromTimeAndFold

* Added a test for the C API wrapper of PyTime_FromTimeAndFold

* Added a C API function for PyDelta_FromDSU

* Added a test for the C API wrapper of PyDelta_FromDSU

* Refactor code, re-edit lines longer than 80 chars

* Fix Whitespace issues in DatetimeTester

* List all tests that were added in this PR

* Update 2019-05-04-21-25-19.bpo-36782.h3oPIb.rst

* Reformat code as per PEP7 guidelines

* Remove unused varibles from another function

* Added specific tests for the Fold Attribute

* Update 2019-05-04-21-25-19.bpo-36782.h3oPIb.rst

* Reformat code according to requested changes

* Reformat code to PEP7 Guidelines

* Reformat code to PEP7 Guidelines

* Re-add name to blurb

* Added a backtick to blurb file

* Update 2019-05-04-21-25-19.bpo-36782.h3oPIb.rst

* Remove the need to initialize mandatory parameters

* Make the macro parameter mandatory

* Re-arrange the order of unit-test args

* Removed the need to initialize macro

change all the int macro = 0 to int macro; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

* Removed the need to initialize macro

change all the `int macro = 0` to `int macro`; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

* Removed the need to initialize macro

change all the `int macro = 0` to `int macro`; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

* Removed the need to initialize macro

change all the `int macro = 0` to `int macro`; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

* Removed the need to initialize macro

change all the `int macro = 0` to `int macro`; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

* Removed the need to initialize macro

change all the `int macro = 0` to `int macro`; now that macro is required

Co-Authored-By: Paul Ganssle <pganssle@users.noreply.github.com>

4 files changed, 265 insertions, 4 deletions

diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index af0047fafd..239a0b5ac8 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -6018,6 +6018,100 @@ class CapiTest(unittest.TestCase):
                 with self.subTest(arg=arg, exact=exact):
                     self.assertFalse(is_tzinfo(arg, exact))
 
+    def test_date_from_date(self):
+        exp_date = date(1993, 8, 26)
+
+        for macro in [0, 1]:
+            with self.subTest(macro=macro):
+                c_api_date = _testcapi.get_date_fromdate(
+                    macro,
+                    exp_date.year,
+                    exp_date.month,
+                    exp_date.day)
+
+                self.assertEqual(c_api_date, exp_date)
+
+    def test_datetime_from_dateandtime(self):
+        exp_date = datetime(1993, 8, 26, 22, 12, 55, 99999)
+
+        for macro in [0, 1]:
+            with self.subTest(macro=macro):
+                c_api_date = _testcapi.get_datetime_fromdateandtime(
+                    macro,
+                    exp_date.year,
+                    exp_date.month,
+                    exp_date.day,
+                    exp_date.hour,
+                    exp_date.minute,
+                    exp_date.second,
+                    exp_date.microsecond)
+
+                self.assertEqual(c_api_date, exp_date)
+
+    def test_datetime_from_dateandtimeandfold(self):
+        exp_date = datetime(1993, 8, 26, 22, 12, 55, 99999)
+
+        for fold in [0, 1]:
+            for macro in [0, 1]:
+                with self.subTest(macro=macro, fold=fold):
+                    c_api_date = _testcapi.get_datetime_fromdateandtimeandfold(
+                        macro,
+                        exp_date.year,
+                        exp_date.month,
+                        exp_date.day,
+                        exp_date.hour,
+                        exp_date.minute,
+                        exp_date.second,
+                        exp_date.microsecond,
+                        exp_date.fold)
+
+                    self.assertEqual(c_api_date, exp_date)
+                    self.assertEqual(c_api_date.fold, exp_date.fold)
+
+    def test_time_from_time(self):
+        exp_time = time(22, 12, 55, 99999)
+
+        for macro in [0, 1]:
+            with self.subTest(macro=macro):
+                c_api_time = _testcapi.get_time_fromtime(
+                    macro,
+                    exp_time.hour,
+                    exp_time.minute,
+                    exp_time.second,
+                    exp_time.microsecond)
+
+                self.assertEqual(c_api_time, exp_time)
+
+    def test_time_from_timeandfold(self):
+        exp_time = time(22, 12, 55, 99999)
+
+        for fold in [0, 1]:
+            for macro in [0, 1]:
+                with self.subTest(macro=macro, fold=fold):
+                    c_api_time = _testcapi.get_time_fromtimeandfold(
+                        macro,
+                        exp_time.hour,
+                        exp_time.minute,
+                        exp_time.second,
+                        exp_time.microsecond,
+                        exp_time.fold)
+
+                    self.assertEqual(c_api_time, exp_time)
+                    self.assertEqual(c_api_time.fold, exp_time.fold)
+
+    def test_delta_from_dsu(self):
+        exp_delta = timedelta(26, 55, 99999)
+
+        for macro in [0, 1]:
+            with self.subTest(macro=macro):
+                c_api_delta = _testcapi.get_delta_fromdsu(
+                    macro,
+                    exp_delta.days,
+                    exp_delta.seconds,
+                    exp_delta.microseconds)
+
+                self.assertEqual(c_api_delta, exp_delta)
+
     def test_date_from_timestamp(self):
         ts = datetime(1995, 4, 12).timestamp()
 
@@ -6028,9 +6122,6 @@ class CapiTest(unittest.TestCase):
                 self.assertEqual(d, date(1995, 4, 12))
 
     def test_datetime_from_timestamp(self):
-        ts0 = datetime(1995, 4, 12).timestamp()
-        ts1 = datetime(1995, 4, 12, 12, 30).timestamp()
-
         cases = [
             ((1995, 4, 12), None, False),
             ((1995, 4, 12), None, True),
diff --git a/Misc/ACKS b/Misc/ACKS
index 06e288dfcb..8b3232551e 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1857,3 +1857,4 @@ Peter Åstrand
 Zheao Li
 Carsten Klein
 Diego Rojas
+Edison Abahurire
diff --git a/Misc/NEWS.d/next/Tests/2019-05-04-21-25-19.bpo-36782.h3oPIb.rst b/Misc/NEWS.d/next/Tests/2019-05-04-21-25-19.bpo-36782.h3oPIb.rst
new file mode 100644
index 0000000000..222fb386ca
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2019-05-04-21-25-19.bpo-36782.h3oPIb.rst
@@ -0,0 +1 @@
+Add tests for several C API functions in the :mod:`datetime` module. Patch by Edison Abahurire.
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 59b42df279..2af553960c 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -2341,6 +2341,168 @@ get_timezone_utc_capi(PyObject* self, PyObject *args) {
 }
 
 static PyObject *
+get_date_fromdate(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int year, month, day;
+
+    if (!PyArg_ParseTuple(args, "piii", &macro, &year, &month, &day)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyDate_FromDate(year, month, day);
+    }
+    else {
+        rv = PyDateTimeAPI->Date_FromDate(
+            year, month, day,
+            PyDateTimeAPI->DateType);
+    }
+    return rv;
+}
+
+static PyObject *
+get_datetime_fromdateandtime(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int year, month, day;
+    int hour, minute, second, microsecond;
+
+    if (!PyArg_ParseTuple(args, "piiiiiii",
+                          &macro,
+                          &year, &month, &day,
+                          &hour, &minute, &second, &microsecond)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyDateTime_FromDateAndTime(
+            year, month, day,
+            hour, minute, second, microsecond);
+    }
+    else {
+        rv = PyDateTimeAPI->DateTime_FromDateAndTime(
+            year, month, day,
+            hour, minute, second, microsecond,
+            Py_None,
+            PyDateTimeAPI->DateTimeType);
+    }
+    return rv;
+}
+
+static PyObject *
+get_datetime_fromdateandtimeandfold(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int year, month, day;
+    int hour, minute, second, microsecond, fold;
+
+    if (!PyArg_ParseTuple(args, "piiiiiiii",
+                          &macro,
+                          &year, &month, &day,
+                          &hour, &minute, &second, &microsecond,
+                          &fold)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyDateTime_FromDateAndTimeAndFold(
+            year, month, day,
+            hour, minute, second, microsecond,
+            fold);
+    }
+    else {
+        rv = PyDateTimeAPI->DateTime_FromDateAndTimeAndFold(
+            year, month, day,
+            hour, minute, second, microsecond,
+            Py_None,
+            fold,
+            PyDateTimeAPI->DateTimeType);
+    }
+    return rv;
+}
+
+static PyObject *
+get_time_fromtime(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int hour, minute, second, microsecond;
+
+    if (!PyArg_ParseTuple(args, "piiii",
+                          &macro,
+                          &hour, &minute, &second, &microsecond)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyTime_FromTime(hour, minute, second, microsecond);
+    }
+    else {
+        rv = PyDateTimeAPI->Time_FromTime(
+            hour, minute, second, microsecond,
+            Py_None,
+            PyDateTimeAPI->TimeType);
+    }
+    return rv;
+}
+
+static PyObject *
+get_time_fromtimeandfold(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int hour, minute, second, microsecond, fold;
+
+    if (!PyArg_ParseTuple(args, "piiiii",
+                          &macro,
+                          &hour, &minute, &second, &microsecond,
+                          &fold)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyTime_FromTimeAndFold(hour, minute, second, microsecond, fold);
+    }
+    else {
+        rv = PyDateTimeAPI->Time_FromTimeAndFold(
+            hour, minute, second, microsecond,
+            Py_None,
+            fold,
+            PyDateTimeAPI->TimeType);
+    }
+    return rv;
+}
+
+static PyObject *
+get_delta_fromdsu(PyObject *self, PyObject *args)
+{
+    PyObject *rv = NULL;
+    int macro;
+    int days, seconds, microseconds;
+
+    if (!PyArg_ParseTuple(args, "piii",
+                          &macro,
+                          &days, &seconds, &microseconds)) {
+        return NULL;
+    }
+
+    if (macro) {
+        rv = PyDelta_FromDSU(days, seconds, microseconds);
+    }
+    else {
+        rv = PyDateTimeAPI->Delta_FromDelta(
+            days, seconds, microseconds, 1,
+            PyDateTimeAPI->DeltaType);
+    }
+
+    return rv;
+}
+
+static PyObject *
 get_date_fromtimestamp(PyObject* self, PyObject *args)
 {
     PyObject *tsargs = NULL, *ts = NULL, *rv = NULL;
@@ -4826,7 +4988,7 @@ static PyMethodDef TestMethods[] = {
     {"set_errno",               set_errno,                       METH_VARARGS},
     {"test_config",             test_config,                     METH_NOARGS},
     {"test_sizeof_c_types",     test_sizeof_c_types,             METH_NOARGS},
-    {"test_datetime_capi",  test_datetime_capi,              METH_NOARGS},
+    {"test_datetime_capi",      test_datetime_capi,              METH_NOARGS},
     {"datetime_check_date",     datetime_check_date,             METH_VARARGS},
     {"datetime_check_time",     datetime_check_time,             METH_VARARGS},
     {"datetime_check_datetime",     datetime_check_datetime,     METH_VARARGS},
@@ -4835,6 +4997,12 @@ static PyMethodDef TestMethods[] = {
     {"make_timezones_capi",     make_timezones_capi,             METH_NOARGS},
     {"get_timezones_offset_zero",   get_timezones_offset_zero,   METH_NOARGS},
     {"get_timezone_utc_capi",    get_timezone_utc_capi,          METH_VARARGS},
+    {"get_date_fromdate",        get_date_fromdate,              METH_VARARGS},
+    {"get_datetime_fromdateandtime", get_datetime_fromdateandtime, METH_VARARGS},
+    {"get_datetime_fromdateandtimeandfold", get_datetime_fromdateandtimeandfold, METH_VARARGS},
+    {"get_time_fromtime",        get_time_fromtime,              METH_VARARGS},
+    {"get_time_fromtimeandfold", get_time_fromtimeandfold,       METH_VARARGS},
+    {"get_delta_fromdsu",        get_delta_fromdsu,              METH_VARARGS},
     {"get_date_fromtimestamp",   get_date_fromtimestamp,         METH_VARARGS},
     {"get_datetime_fromtimestamp", get_datetime_fromtimestamp,   METH_VARARGS},
     {"test_list_api",           test_list_api,                   METH_NOARGS},