Add ck_skip() and ck_skip_msg(...) macros

* `ck_skip()` aborts the tests and marks it as skipped
* `ck_skip_msg(...)` does the same with a custom printf message
* `_ck_skip()` is exposed as a symbol

src/check.c

@@ -362,7 +362,10 @@ void _mark_point(const char *file, int line)
     send_loc_info(file, line);
 }
 
-void _ck_assert_failed(const char *file, int line, const char *expr, ...)
+#if HAVE_FORK
+CK_ATTRIBUTE_NORETURN
+#endif
+static void _assert_failed(const char *file, int line, int wasskipped, const char *expr, va_list apo)
 {
     const char *msg;
     va_list ap;
@@ -371,7 +374,11 @@ void _ck_assert_failed(const char *file, int line, const char *expr, ...)
 
     send_loc_info(file, line);
 
-    va_start(ap, expr);
+#if defined(va_copy)
+    va_copy(ap, apo);
+#else
+    ap = apo;
+#endif
     msg = (const char *)va_arg(ap, char *);
 
     /*
@@ -389,7 +396,7 @@ void _ck_assert_failed(const char *file, int line, const char *expr, ...)
     }
 
     va_end(ap);
-    send_failure_info(to_send);
+    send_failure_info(to_send, wasskipped);
     if(cur_fork_status() == CK_FORK)
     {
 #if defined(HAVE_FORK) && HAVE_FORK==1
@@ -402,6 +409,22 @@ void _ck_assert_failed(const char *file, int line, const char *expr, ...)
     }
 }
 
+void _ck_assert_failed(const char *file, int line, const char *expr, ...)
+{
+    va_list ap;
+    va_start(ap, expr);
+    _assert_failed(file, line, 0, expr, ap);
+    va_end(ap);
+}
+
+void _ck_skip(const char *file, int line, const char *expr, ...)
+{
+    va_list ap;
+    va_start(ap, expr);
+    _assert_failed(file, line, 1, expr, ap);
+    va_end(ap);
+}
+
 SRunner *srunner_create(Suite * s)
 {
     SRunner *sr = (SRunner *)emalloc(sizeof(SRunner));     /* freed in srunner_free */
@@ -410,7 +433,7 @@ SRunner *srunner_create(Suite * s)
     if(s != NULL)
         check_list_add_end(sr->slst, s);
     sr->stats = (TestStats *)emalloc(sizeof(TestStats));     /* freed in srunner_free */
-    sr->stats->n_checked = sr->stats->n_failed = sr->stats->n_errors = 0;
+    sr->stats->n_checked = sr->stats->n_failed = sr->stats->n_errors = sr->stats->n_skipped = 0;
     sr->resultlst = check_list_create();
     sr->log_fname = NULL;
     sr->xml_fname = NULL;
@@ -514,7 +537,7 @@ TestResult **srunner_results(SRunner * sr)
 
 static int non_pass(int val)
 {
-    return val != CK_PASS;
+    return val != CK_PASS && val != CK_SKIP;
 }
 
 TestResult *tr_create(void)
@@ -536,6 +559,7 @@ static void tr_init(TestResult * tr)
     tr->tcname = NULL;
     tr->tname = NULL;
     tr->duration = -1;
+    tr->wasskipped = 0;
 }
 
 void tr_free(TestResult * tr)

src/check.h.in

@@ -489,20 +489,25 @@ static void __testname ## _fn (int _i CK_ATTRIBUTE_UNUSED)
 #define fail ck_abort_msg
 
 /*
- * This is called whenever an assertion fails.
- * Note that it only has the noreturn modifier when
- * using fork. If fork is unavailable, the function
- * calls longjmp() when a test assertion fails. Marking
- * the function as noreturn causes gcc to make assumptions
+ * These are called whenever an assertion fails or a test is skipped.
+ * Note that they only have the noreturn modifier when
+ * using fork. If fork is unavailable, the functions
+ * call longjmp() when a test assertion fails. Marking
+ * the functions as noreturn causes gcc to make assumptions
  * which are not valid, as longjmp() is like a return.
  */
 #if @HAVE_FORK@
 CK_DLL_EXP void CK_EXPORT _ck_assert_failed(const char *file, int line,
                                             const char *expr,
                                             ...) CK_ATTRIBUTE_NORETURN;
+CK_DLL_EXP void CK_EXPORT _ck_skip(const char *file, int line,
+                                   const char *expr,
+                                   ...) CK_ATTRIBUTE_NORETURN;
 #else
 CK_DLL_EXP void CK_EXPORT _ck_assert_failed(const char *file, int line,
                                             const char *expr, ...);
+CK_DLL_EXP void CK_EXPORT _ck_skip(const char *file, int line,
+                                   const char *expr, ...);
 #endif
 
 /**
@@ -553,6 +558,21 @@ CK_DLL_EXP void CK_EXPORT _ck_assert_failed(const char *file, int line,
  */
 #define ck_abort_msg(...) _ck_assert_failed(__FILE__, __LINE__, "Failed" , ## __VA_ARGS__, NULL)
 
+/**
+ * Unconditionally mark the test as skipped
+ *
+ * @note Once called, the remaining of the test is aborted
+ */
+#define ck_skip() ck_skip_msg(NULL)
+/**
+ * Unconditionally mark the test as skipped; print a message
+ *
+ * @param ... message to print (in printf format)
+ *
+ * @note Once called, the remaining of the test is aborted
+ */
+#define ck_skip_msg(...) _ck_skip(__FILE__, __LINE__, "Skipped" , ## __VA_ARGS__, NULL)
+
 /* Signed and unsigned integer comparison macros with improved output compared to ck_assert(). */
 /* OP may be any comparison operator. */
 #define _ck_assert_int(X, OP, Y) do { \
@@ -1812,8 +1832,9 @@ enum test_result
     CK_TEST_RESULT_INVALID,     /**< Default value; should not encounter this */
     CK_PASS,                    /**< Test passed */
     CK_FAILURE,                 /**< Test completed but failed */
-    CK_ERROR                    /**< Test failed to complete
+    CK_ERROR,                   /**< Test failed to complete
                                    (unexpected signal or non-zero early exit) */
+    CK_SKIP                     /**< Test marked as skipped */
 };
 
 /**

src/check_impl.h

@@ -72,6 +72,7 @@ typedef struct TestStats
     int n_checked;
     int n_failed;
     int n_errors;
+    int n_skipped;
 } TestStats;
 
 struct TestResult
@@ -85,6 +86,7 @@ struct TestResult
     const char *tcname;         /* Test case that generated the result */
     const char *tname;          /* Test that generated the result */
     char *msg;                  /* Failure message */
+    int wasskipped;             /* Whether the test was skipped */
 };
 
 TestResult *tr_create(void);

src/check_log.c

@@ -370,9 +370,9 @@ void tap_lfun(SRunner * sr CK_ATTRIBUTE_UNUSED, FILE * file,
             /* Print the test result to the tap file */
             num_tests_run += 1;
             tr = (TestResult *)obj;
-            fprintf(file, "%s %d - %s:%s:%s: %s\n",
-                    tr->rtype == CK_PASS ? "ok" : "not ok", num_tests_run,
-                    tr->file, tr->tcname, tr->tname, tr->msg);
+            fprintf(file, "%s %d - %s:%s:%s: %s%s\n",
+                    tr->rtype == CK_PASS || tr->rtype == CK_SKIP ? "ok" : "not ok", num_tests_run,
+                    tr->file, tr->tcname, tr->tname, tr->rtype == CK_SKIP ? "# skip " : "", tr->msg);
             fflush(file);
             break;
         default:
@@ -430,6 +430,9 @@ void subunit_lfun(SRunner * sr, FILE * file, enum print_output printmode,
                     case CK_ERROR:
                         subunit_test_error(name, msg);
                         break;
+                    case CK_SKIP:
+                        subunit_test_skip(name, msg);
+                        break;
                     case CK_TEST_RESULT_INVALID:
                     default:
                         eprintf("Bad result type in subunit_lfun", __FILE__,

src/check_msg.c

@@ -82,11 +82,12 @@ static FILE *get_pipe(void)
     return NULL;
 }
 
-void send_failure_info(const char *msg)
+void send_failure_info(const char *msg, int wasskipped)
 {
     FailMsg fmsg;
 
     fmsg.msg = strdup(msg);
+    fmsg.wasskipped = wasskipped;
     ppack(get_pipe(), CK_MSG_FAIL, (CheckMsg *) & fmsg);
     free(fmsg.msg);
 }
@@ -184,6 +185,7 @@ static TestResult *construct_test_result(RcvMsg * rmsg, int waserror)
             tr->ctx = rmsg->lastctx;
         }
 
+        tr->wasskipped = rmsg->wasskipped;
         tr->msg = rmsg->msg;
         rmsg->msg = NULL;
         tr_set_loc_by_ctx(tr, tr->ctx, rmsg);

src/check_msg.h

@@ -24,7 +24,7 @@
 
 /* Functions implementing messaging during test runs */
 
-void send_failure_info(const char *msg);
+void send_failure_info(const char *msg, int wasskipped);
 void send_loc_info(const char *file, int line);
 void send_ctx_info(enum ck_result_ctx ctx);
 void send_duration_info(int duration);

src/check_pack.c

@@ -328,17 +328,19 @@ static size_t pack_fail(char **buf, FailMsg * fmsg)
     char *ptr;
     size_t len;
 
-    len = 4 + 4 + (fmsg->msg ? strlen(fmsg->msg) : 0);
+    len = 4 + 4 + 4 + (fmsg->msg ? strlen(fmsg->msg) : 0);
     *buf = ptr = (char *)emalloc(len);
 
     pack_type(&ptr, CK_MSG_FAIL);
+    pack_int(&ptr, fmsg->wasskipped);
     pack_str(&ptr, fmsg->msg);
 
     return len;
 }
 
 static void upack_fail(char **buf, FailMsg * fmsg)
 {
+    fmsg->wasskipped = upack_int(buf);
     fmsg->msg = upack_str(buf);
 }
 
@@ -431,6 +433,7 @@ static size_t get_result(char *buf, RcvMsg * rmsg)
         {
             rmsg->msg = strdup(fmsg->msg);
             rmsg->failctx = rmsg->lastctx;
+            rmsg->wasskipped = fmsg->wasskipped;
         }
         else
         {
@@ -471,6 +474,7 @@ static RcvMsg *rcvmsg_create(void)
     rmsg->failctx = CK_CTX_INVALID;
     rmsg->msg = NULL;
     rmsg->duration = -1;
+    rmsg->wasskipped = 0;
     reset_rcv_test(rmsg);
     reset_rcv_fixture(rmsg);
     return rmsg;

src/check_pack.h

@@ -45,6 +45,7 @@ typedef struct LocMsg
 typedef struct FailMsg
 {
     char *msg;
+    int wasskipped;
 } FailMsg;
 
 typedef struct DurationMsg
@@ -70,6 +71,7 @@ typedef struct RcvMsg
     int test_line;
     char *msg;
     int duration;
+    int wasskipped;
 } RcvMsg;
 
 void rcvmsg_free(RcvMsg * rmsg);

src/check_print.c

@@ -184,6 +184,9 @@ void tr_xmlprint(FILE * file, TestResult * tr,
         case CK_ERROR:
             snprintf(result, sizeof(result), "%s", "error");
             break;
+        case CK_SKIP:
+            snprintf(result, sizeof(result), "%s", "skipped");
+            break;
         case CK_TEST_RESULT_INVALID:
         default:
             abort();

src/check_run.c

@@ -284,6 +284,8 @@ static void srunner_add_failure(SRunner * sr, TestResult * tr)
         sr->stats->n_failed++;
     else if(tr->rtype == CK_ERROR)
         sr->stats->n_errors++;
+    if(tr->rtype == CK_SKIP)
+        sr->stats->n_skipped++;
 
 }
 
@@ -460,7 +462,7 @@ static void set_nofork_info(TestResult * tr)
     }
     else
     {
-        tr->rtype = CK_FAILURE;
+        tr->rtype = tr->wasskipped ? CK_SKIP : CK_FAILURE;
     }
 }
 
@@ -639,7 +641,7 @@ static void set_fork_info(TestResult * tr, int status, int signal_expected,
             }
             else
             {
-                tr->rtype = CK_FAILURE;
+                tr->rtype = tr->wasskipped ? CK_SKIP : CK_FAILURE;
             }
         }
     }
@@ -654,11 +656,11 @@ static void set_fork_info(TestResult * tr, int status, int signal_expected,
             tr->msg = exit_msg(exit_status);
             if(exit_status == allowed_exit_value)
             {
-                tr->rtype = CK_FAILURE; /* normal exit status */
+                tr->rtype = tr->wasskipped ? CK_SKIP : CK_FAILURE; /* normal exit status */
             }
             else
             {
-                tr->rtype = CK_FAILURE; /* early exit */
+                tr->rtype = tr->wasskipped ? CK_SKIP : CK_FAILURE; /* early exit */
             }
         }
     }

src/check_str.c

@@ -67,9 +67,15 @@ char *sr_stat_str(SRunner * sr)
 
     ts = sr->stats;
 
-    str = ck_strdup_printf("%d%%: Checks: %d, Failures: %d, Errors: %d",
-                           percent_passed(ts), ts->n_checked, ts->n_failed,
-                           ts->n_errors);
+    if (ts->n_skipped <= 0) {
+        str = ck_strdup_printf("%d%%: Checks: %d, Failures: %d, Errors: %d",
+                               percent_passed(ts), ts->n_checked, ts->n_failed,
+                               ts->n_errors);
+    } else {
+        str = ck_strdup_printf("%d%%: Checks: %d, Failures: %d, Errors: %d, Skipped: %d",
+                               percent_passed(ts), ts->n_checked, ts->n_failed,
+                               ts->n_errors, ts->n_skipped);
+    }
 
     return str;
 }
@@ -114,6 +120,8 @@ static const char *tr_type_str(TestResult * tr)
             return "F";
         if(tr->rtype == CK_ERROR)
             return "E";
+        if(tr->rtype == CK_SKIP)
+            return "K";
         return NULL;
     }
     return "S";
@@ -125,6 +133,6 @@ static int percent_passed(TestStats * t)
         return 100;
     if(t->n_checked == 0)
         return 0;
-    return (int)((float)(t->n_checked - (t->n_failed + t->n_errors)) /
-                 (float)t->n_checked * 100);
+    return (int)((float)(t->n_checked - t->n_skipped - (t->n_failed + t->n_errors)) /
+                 (float)(t->n_checked - t->n_skipped) * 100);
 }