run test for traceback module

ports/unix/variants/coverage/mpconfigvariant.mk

@@ -36,6 +36,7 @@ SRC_BITMAP := \
 	shared-bindings/bitmaptools/__init__.c \
 	shared-bindings/displayio/Bitmap.c \
 	shared-bindings/rainbowio/__init__.c \
+	shared-bindings/traceback/__init__.c \
 	shared-bindings/util.c \
 	shared-module/aesio/aes.c \
 	shared-module/aesio/__init__.c \
@@ -45,11 +46,18 @@ SRC_BITMAP := \
 	shared-module/displayio/ColorConverter.c \
 	shared-module/displayio/ColorConverter.c \
 	shared-module/rainbowio/__init__.c \
+	shared-module/traceback/__init__.c
 
 $(info $(SRC_BITMAP))
 SRC_C += $(SRC_BITMAP)
 
-CFLAGS += -DCIRCUITPY_GIFIO=1 -DCIRCUITPY_DISPLAYIO_UNIX=1 -DCIRCUITPY_BITMAPTOOLS=1 -DCIRCUITPY_RAINBOWIO=1 -DCIRCUITPY_AESIO=1
+CFLAGS += \
+	-DCIRCUITPY_AESIO=1 \
+	-DCIRCUITPY_BITMAPTOOLS=1 \
+	-DCIRCUITPY_DISPLAYIO_UNIX=1 \
+	-DCIRCUITPY_GIFIO=1 \
+	-DCIRCUITPY_RAINBOWIO=1 \
+	-DCIRCUITPY_TRACEBACK=1
 
 SRC_C += coverage.c
 SRC_CXX += coveragecpp.cpp

shared-bindings/traceback/__init__.c

@@ -85,9 +85,9 @@ STATIC void traceback_exception_common(mp_print_t *print, mp_obj_t value, mp_obj
 STATIC mp_obj_t traceback_format_exception(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     enum { ARG_etype, ARG_value, ARG_tb, ARG_limit, ARG_chain };
     static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_etype, MP_ARG_OBJ | MP_ARG_REQUIRED },
-        { MP_QSTR_value, MP_ARG_OBJ | MP_ARG_REQUIRED },
-        { MP_QSTR_tb,    MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_etype, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_value, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_tb,    MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
         { MP_QSTR_limit, MP_ARG_OBJ,  {.u_obj = mp_const_none} },
         { MP_QSTR_chain, MP_ARG_BOOL, {.u_bool = true} },
     };
@@ -127,9 +127,9 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_KW(traceback_format_exception_obj, 0, traceback_f
 STATIC mp_obj_t traceback_print_exception(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     enum { ARG_etype, ARG_value, ARG_tb, ARG_limit, ARG_file, ARG_chain };
     static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_etype, MP_ARG_OBJ | MP_ARG_REQUIRED },
-        { MP_QSTR_value, MP_ARG_OBJ | MP_ARG_REQUIRED },
-        { MP_QSTR_tb,    MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_etype, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_value, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_tb,    MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL} },
         { MP_QSTR_limit, MP_ARG_OBJ,  {.u_obj = mp_const_none} },
         { MP_QSTR_file,  MP_ARG_OBJ,  {.u_obj = mp_const_none} },
         { MP_QSTR_chain, MP_ARG_BOOL, {.u_bool = true} },

tests/circuitpython/traceback_test.py.exp

@@ -0,0 +1,23 @@
+
+No Trace:
+Exception: test
+
+Default Trace:
+Traceback (most recent call last):
+  File "circuitpython/traceback_test.py", line 13, in <module>
+  File "circuitpython/traceback_test.py", line 9, in fun
+Exception: test
+
+Limit=1 Trace:
+Traceback (most recent call last):
+  File "circuitpython/traceback_test.py", line 13, in <module>
+Exception: test
+
+Limit=0 Trace:
+Exception: test
+
+Limit=-1 Trace:
+Traceback (most recent call last):
+  File "circuitpython/traceback_test.py", line 9, in fun
+Exception: test
+

tests/run-tests.py

@@ -511,6 +511,9 @@ def run_tests(pyb, tests, args, result_dir, num_threads=1):
         skip_tests.add("basics/scope_implicit.py")  # requires checking for unbound local
         skip_tests.add("basics/try_finally_return2.py")  # requires raise_varargs
         skip_tests.add("basics/unboundlocal.py")  # requires checking for unbound local
+        skip_tests.add(
+            "circuitpython/traceback_test.py"
+        )  # because native doesn't have proper traceback info
         skip_tests.add("extmod/uasyncio_event.py")  # unknown issue
         skip_tests.add("extmod/uasyncio_lock.py")  # requires async with
         skip_tests.add("extmod/uasyncio_micropython.py")  # unknown issue

tests/unix/extra_coverage.py.exp

@@ -35,11 +35,11 @@ cexample        cmath           collections     cppexample
 displayio       errno           ffi             framebuf
 gc              gifio           hashlib         json
 math            qrio            rainbowio       re
-sys             termios         ubinascii       uctypes
-uerrno          uheapq          uio             ujson
-ulab            uos             urandom         ure
-uselect         ustruct         utime           utimeq
-uzlib
+sys             termios         traceback       ubinascii
+uctypes         uerrno          uheapq          uio
+ujson           ulab            uos             urandom
+ure             uselect         ustruct         utime
+utimeq          uzlib
 ime
 
 utime           utimeq