tests/libqtest: Introduce qtest_init_with_serial()

Run qtest with a socket that connects QEMU chardev and test code.

Signed-off-by: Julia Suvorova <jusual@mail.ru>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20190123120759.7162-2-jusual@mail.ru
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 36 insertions, 0 deletions

diff --git a/tests/libqtest.c b/tests/libqtest.c
index 55750dd68d..6fb30855fa 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -315,6 +315,31 @@ QTestState *qtest_initf(const char *fmt, ...)
     return s;
 }
 
+QTestState *qtest_init_with_serial(const char *extra_args, int *sock_fd)
+{
+    int sock_fd_init;
+    char *sock_path, sock_dir[] = "/tmp/qtest-serial-XXXXXX";
+    QTestState *qts;
+
+    g_assert_true(mkdtemp(sock_dir) != NULL);
+    sock_path = g_strdup_printf("%s/sock", sock_dir);
+
+    sock_fd_init = init_socket(sock_path);
+
+    qts = qtest_initf("-chardev socket,id=s0,path=%s -serial chardev:s0 %s",
+                      sock_path, extra_args);
+
+    *sock_fd = socket_accept(sock_fd_init);
+
+    unlink(sock_path);
+    g_free(sock_path);
+    rmdir(sock_dir);
+
+    g_assert_true(*sock_fd >= 0);
+
+    return qts;
+}
+
 void qtest_quit(QTestState *s)
 {
     g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
diff --git a/tests/libqtest.h b/tests/libqtest.h
index 7ea94139b0..5937f91912 100644
--- a/tests/libqtest.h
+++ b/tests/libqtest.h
@@ -63,6 +63,17 @@ QTestState *qtest_init(const char *extra_args);
 QTestState *qtest_init_without_qmp_handshake(const char *extra_args);
 
 /**
+ * qtest_init_with_serial:
+ * @extra_args: other arguments to pass to QEMU.  CAUTION: these
+ * arguments are subject to word splitting and shell evaluation.
+ * @sock_fd: pointer to store the socket file descriptor for
+ * connection with serial.
+ *
+ * Returns: #QTestState instance.
+ */
+QTestState *qtest_init_with_serial(const char *extra_args, int *sock_fd);
+
+/**
  * qtest_quit:
  * @s: #QTestState instance to operate on.
  *