tests/unix/extra_coverage: Add test for str/bytes with invalid hash.

tests/unix/extra_coverage.py

@@ -5,4 +5,11 @@ except NameError:
     import sys
     sys.exit()
 
-extra_coverage()
+data = extra_coverage()
+
+# test hashing of str/bytes that have an invalid hash
+print(data)
+print(hash(data[0]))
+print(hash(data[1]))
+print(hash(bytes(data[0], 'utf8')))
+print(hash(str(data[1], 'utf8')))

tests/unix/extra_coverage.py.exp

@@ -35,3 +35,8 @@ ementation
 12345678
 0
 0
+('0123456789', b'0123456789')
+7300
+7300
+7300
+7300

unix/coverage.c

@@ -1,12 +1,17 @@
 #include <stdio.h>
 
 #include "py/obj.h"
+#include "py/objstr.h"
 #include "py/runtime.h"
 #include "py/repl.h"
 #include "py/mpz.h"
 
 #if defined(MICROPY_UNIX_COVERAGE)
 
+// str/bytes objects without a valid hash
+STATIC const mp_obj_str_t str_no_hash_obj = {{&mp_type_str}, 0, 10, (const byte*)"0123456789"};
+STATIC const mp_obj_str_t bytes_no_hash_obj = {{&mp_type_bytes}, 0, 10, (const byte*)"0123456789"};
+
 // function to run extra tests for things that can't be checked by scripts
 STATIC mp_obj_t extra_coverage(void) {
     // mp_printf (used by ports that don't have a native printf)
@@ -109,7 +114,9 @@ STATIC mp_obj_t extra_coverage(void) {
         mp_printf(&mp_plat_print, "%d\n", mpz_as_uint_checked(&mpz, &value));
     }
 
-    return mp_const_none;
+    // return a tuple of data for testing on the Python side
+    mp_obj_t items[] = {(mp_obj_t)&str_no_hash_obj, (mp_obj_t)&bytes_no_hash_obj};
+    return mp_obj_new_tuple(MP_ARRAY_SIZE(items), items);
 }
 MP_DEFINE_CONST_FUN_OBJ_0(extra_coverage_obj, extra_coverage);