tests/run-tests: Explicitly mark feature checks as special tests.

tests/run-tests

@@ -49,15 +49,15 @@ def convert_regex_escapes(line):
     return bytes(''.join(cs), 'utf8')
 
 
-def run_micropython(pyb, args, test_file):
+def run_micropython(pyb, args, test_file, is_special=False):
     special_tests = ('micropython/meminfo.py', 'basics/bytes_compare3.py', 'basics/builtin_help.py', 'thread/thread_exc2.py')
-    is_special = False
     if pyb is None:
         # run on PC
         if test_file.startswith(('cmdline/', 'feature_check/')) or test_file in special_tests:
             # special handling for tests of the unix cmdline program
             is_special = True
 
+        if is_special:
             # check for any cmdline options needed for this test
             args = [MICROPYTHON]
             with open(test_file, 'rb') as f:
@@ -209,33 +209,33 @@ def run_tests(pyb, tests, args, base_path="."):
         skip_native = True
 
     # Check if arbitrary-precision integers are supported, and skip such tests if it's not
-    native = run_micropython(pyb, args, base_path + '/feature_check/int_big.py')
+    native = run_micropython(pyb, args, base_path + '/feature_check/int_big.py', True)
     if native != b'1000000000000000000000000000000000000000000000\n':
         skip_int_big = True
 
     # Check if set type (and set literals) is supported, and skip such tests if it's not
-    native = run_micropython(pyb, args, base_path + '/feature_check/set_check.py')
+    native = run_micropython(pyb, args, base_path + '/feature_check/set_check.py', True)
     if native == b'CRASH':
         skip_set_type = True
 
     # Check if async/await keywords are supported, and skip such tests if it's not
-    native = run_micropython(pyb, args, base_path + '/feature_check/async_check.py')
+    native = run_micropython(pyb, args, base_path + '/feature_check/async_check.py', True)
     if native == b'CRASH':
         skip_async = True
 
     # Check if const keyword (MicroPython extension) is supported, and skip such tests if it's not
-    native = run_micropython(pyb, args, base_path + '/feature_check/const.py')
+    native = run_micropython(pyb, args, base_path + '/feature_check/const.py', True)
     if native == b'CRASH':
         skip_const = True
 
     # Check if emacs repl is supported, and skip such tests if it's not
-    t = run_micropython(pyb, args, base_path + '/feature_check/repl_emacs_check.py')
+    t = run_micropython(pyb, args, base_path + '/feature_check/repl_emacs_check.py', True)
     if not 'True' in str(t, 'ascii'):
         skip_tests.add('cmdline/repl_emacs_keys.py')
 
     upy_byteorder = run_micropython(pyb, args, base_path + '/feature_check/byteorder.py')
     has_complex = run_micropython(pyb, args, base_path + '/feature_check/complex.py') == b'complex\n'
-    has_coverage = run_micropython(pyb, args, base_path + '/feature_check/coverage.py') == b'coverage\n'
+    has_coverage = run_micropython(pyb, args, base_path + '/feature_check/coverage.py', True) == b'coverage\n'
     cpy_byteorder = subprocess.check_output([CPYTHON3, base_path + '/feature_check/byteorder.py'])
     skip_endian = (upy_byteorder != cpy_byteorder)