tests/run-tests.py: Run tests-with-regex-output as normal tests.

Some tests (currently given by the `special_tests` list) have output which
must be mached via a regex, because it can change from run to run (eg the
address of an object is printed).  These tests are currently classified as
`is_special` in the test runner, which means they get special treatment.
In particular they don't set the emitter as specified by `args.emit`.  That
means these tests do not run via .mpy or using the native emitter, even if
those options are given on the command line.

This commit fixes that by considering `is_special` as different to
`tests_with_regex_output`.  The former is used for things like target
feature detection (which are not really tests) and when extra command line
options need to be passed to the unix micropython executable.  The latter
(now called `tests_with_regex_output`) are specifically for tests that have
output to be matched via regex.

The `thread_exc2.py` test now needs to be excluded when running using the
native emitter, because the native emitter doesn't print traceback info.
And the `sys_settrace_cov.py` test needs to be excluded because set-trace
output is different with the native emitter.

Signed-off-by: Damien George <damien@micropython.org>

tests/run-tests.py

@@ -127,6 +127,7 @@ emitter_tests_to_skip = {
         "micropython/emg_exc.py",
         "micropython/heapalloc_traceback.py",
         "micropython/opt_level_lineno.py",
+        "thread/thread_exc2.py",
         # These require stack-allocated slice optimisation.
         "micropython/heapalloc_slice.py",
         # These require running the scheduler.
@@ -136,6 +137,7 @@ emitter_tests_to_skip = {
         # These require sys.exc_info().
         "misc/sys_exc_info.py",
         # These require sys.settrace().
+        "misc/sys_settrace_cov.py",
         "misc/sys_settrace_features.py",
         "misc/sys_settrace_generator.py",
         "misc/sys_settrace_loop.py",
@@ -392,7 +394,7 @@ def run_script_on_remote_target(pyb, args, test_file, is_special):
     return had_crash, output_mupy
 
 
-special_tests = [
+tests_with_regex_output = [
     base_path(file)
     for file in (
         "micropython/meminfo.py",
@@ -409,10 +411,7 @@ def run_micropython(pyb, args, test_file, test_file_abspath, is_special=False):
     had_crash = False
     if pyb is None:
         # run on PC
-        if (
-            test_file_abspath.startswith((base_path("cmdline/"), base_path("feature_check/")))
-            or test_file_abspath in special_tests
-        ):
+        if test_file_abspath.startswith((base_path("cmdline/"), base_path("feature_check/"))):
             # special handling for tests of the unix cmdline program
             is_special = True
 
@@ -544,7 +543,7 @@ def run_micropython(pyb, args, test_file, test_file_abspath, is_special=False):
     if is_special and not had_crash and b"\nSKIP\n" in output_mupy:
         return b"SKIP\n"
 
-    if is_special or test_file_abspath in special_tests:
+    if is_special or test_file_abspath in tests_with_regex_output:
         # convert parts of the output that are not stable across runs
         with open(test_file + ".exp", "rb") as f:
             lines_exp = []