1 files changed, 90 insertions, 0 deletions
diff --git a/src/test/test-watch-pid.c b/src/test/test-watch-pid.c
new file mode 100644
index 0000000..8c355c1
--- /dev/null
+++ b/src/test/test-watch-pid.c
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "log.h"
+#include "manager.h"
+#include "rm-rf.h"
+#include "service.h"
+#include "tests.h"
+
+int main(int argc, char *argv[]) {
+        _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
+        _cleanup_(manager_freep) Manager *m = NULL;
+        Unit *a, *b, *c, *u;
+        int r;
+
+        test_setup_logging(LOG_DEBUG);
+
+        if (getuid() != 0)
+                return log_tests_skipped("not root");
+        r = enter_cgroup_subroot(NULL);
+        if (r == -ENOMEDIUM)
+                return log_tests_skipped("cgroupfs not available");
+
+        _cleanup_free_ char *unit_dir = NULL;
+        assert_se(get_testdata_dir("units/", &unit_dir) >= 0);
+        assert_se(set_unit_path(unit_dir) >= 0);
+
+        assert_se(runtime_dir = setup_fake_runtime_dir());
+
+        assert_se(manager_new(LOOKUP_SCOPE_USER, MANAGER_TEST_RUN_BASIC, &m) >= 0);
+        assert_se(manager_startup(m, NULL, NULL, NULL) >= 0);
+
+        assert_se(a = unit_new(m, sizeof(Service)));
+        assert_se(unit_add_name(a, "a.service") >= 0);
+        assert_se(set_isempty(a->pids));
+
+        assert_se(b = unit_new(m, sizeof(Service)));
+        assert_se(unit_add_name(b, "b.service") >= 0);
+        assert_se(set_isempty(b->pids));
+
+        assert_se(c = unit_new(m, sizeof(Service)));
+        assert_se(unit_add_name(c, "c.service") >= 0);
+        assert_se(set_isempty(c->pids));
+
+        assert_se(hashmap_isempty(m->watch_pids));
+        assert_se(manager_get_unit_by_pid(m, 4711) == NULL);
+
+        assert_se(unit_watch_pid(a, 4711, false) >= 0);
+        assert_se(manager_get_unit_by_pid(m, 4711) == a);
+
+        assert_se(unit_watch_pid(a, 4711, false) >= 0);
+        assert_se(manager_get_unit_by_pid(m, 4711) == a);
+
+        assert_se(unit_watch_pid(b, 4711, false) >= 0);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == b);
+
+        assert_se(unit_watch_pid(b, 4711, false) >= 0);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == b);
+
+        assert_se(unit_watch_pid(c, 4711, false) >= 0);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == b || u == c);
+
+        assert_se(unit_watch_pid(c, 4711, false) >= 0);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == b || u == c);
+
+        unit_unwatch_pid(b, 4711);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == c);
+
+        unit_unwatch_pid(b, 4711);
+        u = manager_get_unit_by_pid(m, 4711);
+        assert_se(u == a || u == c);
+
+        unit_unwatch_pid(a, 4711);
+        assert_se(manager_get_unit_by_pid(m, 4711) == c);
+
+        unit_unwatch_pid(a, 4711);
+        assert_se(manager_get_unit_by_pid(m, 4711) == c);
+
+        unit_unwatch_pid(c, 4711);
+        assert_se(manager_get_unit_by_pid(m, 4711) == NULL);
+
+        unit_unwatch_pid(c, 4711);
+        assert_se(manager_get_unit_by_pid(m, 4711) == NULL);
+
+        return 0;
+}