qdevice: Add log test

Signed-off-by: Jan Friesse <jfriesse@redhat.com>

(backported from corosync-qdevice project commit
 6f58a222e8f2fd5b71b2d4541931926030862dfe)

qdevices/Makefile.am

@@ -158,9 +158,11 @@ corosync-qdevice-net-certutil: corosync-qdevice-net-certutil.sh
 	    $< > $@
 
 TESTS				= qnetd-cluster-list.test dynar.test dynar-simple-lex.test \
-                                  dynar-getopt-lex.test process-list.test utils.test
+                                  dynar-getopt-lex.test process-list.test utils.test \
+                                  log.test
 check_PROGRAMS			= qnetd-cluster-list.test dynar.test dynar-simple-lex.test \
-                                  dynar-getopt-lex.test process-list.test utils.test
+                                  dynar-getopt-lex.test process-list.test utils.test \
+                                  log.test
 
 qnetd_cluster_list_test_SOURCES	= qnetd-cluster-list.c test-qnetd-cluster-list.c \
                                   qnetd-cluster.c qnetd-cluster.h \
@@ -175,5 +177,6 @@ dynar_getopt_lex_test_SOURCES	= test-dynar-getopt-lex.c dynar.c dynar-str.c dyna
 process_list_test_SOURCES	= test-process-list.c dynar.c dynar-str.c dynar-simple-lex.c \
                                   process-list.c
 utils_test_SOURCES		= test-utils.c utils.c
+log_test_SOURCES		= test-log.c log.c
 
 endif

qdevices/test-log.c

@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * All rights reserved.
+ *
+ * Author: Jan Friesse (jfriesse@redhat.com)
+ *
+ * This software licensed under BSD license, the text of which follows:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - Neither the name of the Red Hat, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+
+#include "log.h"
+
+#define MAX_LINE_LEN		512
+
+static int openlog_called;
+static int openlog_facility;
+static char vsyslog_buf[MAX_LINE_LEN];
+static int vsyslog_priority;
+static int vsyslog_called;
+static int closelog_called;
+
+void
+openlog(const char *ident, int option, int facility)
+{
+
+	openlog_called = 1;
+	openlog_facility = facility;
+}
+
+void
+vsyslog(int priority, const char *format, va_list ap)
+{
+	va_list ap_copy;
+	int res;
+
+	vsyslog_called = 1;
+	vsyslog_priority = priority;
+
+	va_copy(ap_copy, ap);
+	res = vsnprintf(vsyslog_buf, MAX_LINE_LEN, format, ap_copy);
+	assert(res < MAX_LINE_LEN && res != -1);
+	va_end(ap_copy);
+}
+
+void
+closelog(void)
+{
+
+	closelog_called = 1;
+}
+
+static void
+log_check(int priority, const char *msg, int should_be_called, int expected_priority)
+{
+
+	vsyslog_called = 0;
+	vsyslog_priority = -1;
+	vsyslog_buf[0] = '\0';
+
+	log(priority, "%s", msg);
+
+	if (should_be_called) {
+		assert(vsyslog_called);
+		assert(vsyslog_priority == expected_priority);
+		assert(strcmp(vsyslog_buf, msg) == 0);
+	} else {
+		assert(!vsyslog_called);
+	}
+}
+
+int
+main(void)
+{
+
+	openlog_called = 0;
+	assert(log_init("test", LOG_TARGET_SYSLOG, LOG_DAEMON) == 0);
+	assert(openlog_called);
+	assert(openlog_facility == LOG_DAEMON);
+
+	log_check(LOG_INFO, "test log info", 1, LOG_INFO);
+	log_check(LOG_ERR, "test log err", 1, LOG_ERR);
+	log_check(LOG_DEBUG, "test log debug", 0, LOG_DEBUG);
+
+	log_set_debug(1);
+	log_check(LOG_DEBUG, "test log debug", 1, LOG_DEBUG);
+
+	log_set_debug(0);
+	log_check(LOG_DEBUG, "test log debug", 0, LOG_DEBUG);
+
+	log_set_debug(1);
+	log_set_priority_bump(1);
+	log_check(LOG_ERR, "test log err", 1, LOG_ERR);
+	log_check(LOG_DEBUG, "test log debug", 1, LOG_INFO);
+
+	log_set_priority_bump(0);
+	log_check(LOG_ERR, "test log err", 1, LOG_ERR);
+	log_check(LOG_DEBUG, "test log debug", 1, LOG_DEBUG);
+
+	closelog_called = 0;
+	openlog_called = 0;
+	log_set_target(LOG_TARGET_SYSLOG, LOG_USER);
+	assert(openlog_called);
+	assert(closelog_called);
+	assert(openlog_facility == LOG_USER);
+
+	closelog_called = 0;
+	log_close();
+	assert(closelog_called);
+
+	return (0);
+}