tests: add tests for {hashmap,set}_steal_first

Just to make sure that coverity is wrong.

Makefile.am

@@ -1341,6 +1341,7 @@ tests += \
 	test-fileio \
 	test-time \
 	test-hashmap \
+	test-set \
 	test-list \
 	test-tables \
 	test-device-nodes \
@@ -1572,6 +1573,12 @@ test_hashmap_SOURCES = \
 test_hashmap_LDADD = \
 	libsystemd-core.la
 
+test_set_SOURCES = \
+	src/test/test-set.c
+
+test_set_LDADD = \
+	libsystemd-core.la
+
 test_xml_SOURCES = \
 	src/test/test-xml.c
 

src/test/test-hashmap.c

@@ -507,6 +507,26 @@ static void test_hashmap_steal_first_key(void) {
         assert_se(hashmap_isempty(m));
 }
 
+static void test_hashmap_steal_first(void) {
+        _cleanup_hashmap_free_ Hashmap *m = NULL;
+        int seen[3] = {};
+        char *val;
+
+        m = hashmap_new(&string_hash_ops);
+        assert_se(m);
+
+        assert_se(hashmap_put(m, "key 1", (void*) "1") == 1);
+        assert_se(hashmap_put(m, "key 2", (void*) "22") == 1);
+        assert_se(hashmap_put(m, "key 3", (void*) "333") == 1);
+
+        while ((val = hashmap_steal_first(m)))
+                seen[strlen(val) - 1]++;
+
+        assert(seen[0] == 1 && seen[1] == 1 && seen[2] == 1);
+
+        assert_se(hashmap_isempty(m));
+}
+
 static void test_hashmap_clear_free_free(void) {
         _cleanup_hashmap_free_ Hashmap *m = NULL;
 
@@ -560,6 +580,7 @@ int main(int argc, const char *argv[]) {
         test_hashmap_many();
         test_hashmap_first_key();
         test_hashmap_steal_first_key();
+        test_hashmap_steal_first();
         test_hashmap_clear_free_free();
         test_uint64_compare_func();
         test_trivial_compare_func();

src/test/test-set.c

@@ -0,0 +1,47 @@
+/***
+  This file is part of systemd
+
+  Copyright 2014 Zbigniew Jędrzejewski-Szmek
+
+  systemd 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.
+
+  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "util.h"
+#include "set.h"
+
+static void test_set_steal_first(void) {
+        _cleanup_set_free_ Set *m = NULL;
+        int seen[3] = {};
+        char *val;
+
+        m = set_new(&string_hash_ops);
+        assert_se(m);
+
+        assert_se(set_put(m, (void*) "1") == 1);
+        assert_se(set_put(m, (void*) "22") == 1);
+        assert_se(set_put(m, (void*) "333") == 1);
+
+        while ((val = set_steal_first(m)))
+                seen[strlen(val) - 1]++;
+
+        assert(seen[0] == 1 && seen[1] == 1 && seen[2] == 1);
+
+        assert_se(set_isempty(m));
+}
+
+int main(int argc, const char *argv[]) {
+        test_set_steal_first();
+
+        return 0;
+}