Add a base test for statistic file

Create a file and add/remove some nodes.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Christophe Fergeau <cfergeau@redhat.com>

server/tests/Makefile.am

@@ -43,6 +43,7 @@ check_PROGRAMS =				\
 	test-agent-msg-filter			\
 	test-loop				\
 	test-qxl-parsing			\
+	stat-file-test				\
 	$(NULL)
 
 noinst_PROGRAMS =				\

server/tests/stat-file-test.c

@@ -0,0 +1,104 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+   Copyright (C) 2016 Red Hat, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+#include <config.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <glib.h>
+#include <spice.h>
+
+#include "stat-file.h"
+
+/* GLIB_CHECK_VERSION(2, 40, 0) */
+#ifndef g_assert_nonnull
+#define g_assert_nonnull g_assert
+#endif
+#ifndef g_assert_null
+#define g_assert_null(ptr) g_assert((ptr) == NULL)
+#endif
+
+static void stat_file(void)
+{
+    RedStatFile stat_file;
+    StatNodeRef ref, refs[10];
+    uint64_t *counter, *counters[10];
+    int i;
+    char *filename = NULL;
+    char name[20];
+
+    /* create */
+    stat_file_init(&stat_file, 10);
+
+    g_assert_nonnull(stat_file.shm_name);
+    filename = strdup(stat_file.shm_name);
+    g_assert(access(stat_file.shm_name, R_OK));
+
+    /* fill all nodes */
+    for (i = 0; i < 10; ++i) {
+        sprintf(name, "node %d", i);
+        ref = stat_file_add_node(&stat_file, INVALID_STAT_REF, name, TRUE);
+        refs[i] = ref;
+        g_assert_cmpuint(ref,!=,INVALID_STAT_REF);
+    }
+
+    /* should fail */
+    ref = stat_file_add_node(&stat_file, INVALID_STAT_REF, "invalid", TRUE);
+    g_assert_cmpuint(ref,==,INVALID_STAT_REF);
+
+    /* we should find already present nodes */
+    for (i = 0; i < 10; ++i) {
+        /* the formula used here is to take nodes here and there.
+         * As 17 and 10 are coprime numbers you'll get the same numbers
+         * after 10 iterations */
+        sprintf(name, "node %d", (i * 17 + 5) % 10);
+        ref = stat_file_add_node(&stat_file, INVALID_STAT_REF, name, TRUE);
+        g_assert_cmpuint(ref,!=,INVALID_STAT_REF);
+    }
+
+    /* delete some nodes */
+    for (i = 0; i < 6; ++i) {
+        /* see above why the formula is used */
+        int n = (i * 23 + 3) % 10;
+        stat_file_remove_node(&stat_file, refs[n]);
+        refs[n] = INVALID_STAT_REF;
+    }
+
+    /* now there should be some place for some counters */
+    for (i = 0; i < 6; ++i) {
+        sprintf(name, "counter %d", i);
+        counter = stat_file_add_counter(&stat_file, INVALID_STAT_REF, name, TRUE);
+        counters[i] = counter;
+        g_assert_nonnull(counter);
+    }
+    counter = stat_file_add_counter(&stat_file, INVALID_STAT_REF, "invalid", TRUE);
+    g_assert_null(counter);
+
+    stat_file_unlink(&stat_file);
+    g_assert_null(stat_file.shm_name);
+    g_assert_cmpint(access(filename, F_OK),==,-1);
+    free(filename);
+}
+
+int main(int argc, char *argv[])
+{
+    g_test_init(&argc, &argv, NULL);
+
+    g_test_add_func("/server/stat-file", stat_file);
+
+    return g_test_run();
+}