[PATCH 3/6] tests/qtest/display-vga-test: Add proper checks if a device is available

[Thomas Huth <thuth@redhat.com>]

display-vga-test currently tries to guess the usable VGA devices
according to the target architecture that is used for the test.
This of course does not work if QEMU has been built with the
"--without-default-devices" configure switch. To fix this, use the
qtest_has_device() function for the decision instead. This way
we can also consolidate most of the test functions into one single
function (that takes a parameter with the device name now), except
for the multihead test that tries to instantiate two devices and
thus is a little bit different.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/display-vga-test.c | 65 +++++++++++++---------------------
 1 file changed, 25 insertions(+), 40 deletions(-)

diff --git a/tests/qtest/display-vga-test.c b/tests/qtest/display-vga-test.c
index ace3bb28e0..1a26a66061 100644
--- a/tests/qtest/display-vga-test.c
+++ b/tests/qtest/display-vga-test.c
@@ -8,61 +8,46 @@
  */
 
 #include "qemu/osdep.h"
-#include "libqtest-single.h"
-
-static void pci_cirrus(void)
-{
-    qtest_start("-vga none -device cirrus-vga");
-    qtest_end();
-}
-
-static void pci_stdvga(void)
-{
-    qtest_start("-vga none -device VGA");
-    qtest_end();
-}
-
-static void pci_secondary(void)
-{
-    qtest_start("-vga none -device secondary-vga");
-    qtest_end();
-}
+#include "libqtest.h"
 
 static void pci_multihead(void)
 {
-    qtest_start("-vga none -device VGA -device secondary-vga");
-    qtest_end();
-}
+    QTestState *qts;
 
-static void pci_virtio_gpu(void)
-{
-    qtest_start("-vga none -device virtio-gpu-pci");
-    qtest_end();
+    qts = qtest_init("-vga none -device VGA -device secondary-vga");
+    qtest_quit(qts);
 }
 
-static void pci_virtio_vga(void)
+static void test_vga(gconstpointer data)
 {
-    qtest_start("-vga none -device virtio-vga");
-    qtest_end();
+    QTestState *qts;
+
+    qts = qtest_initf("-vga none -device %s", (const char *)data);
+    qtest_quit(qts);
 }
 
 int main(int argc, char **argv)
 {
-    const char *arch = qtest_get_arch();
+    const char *devices[] = {
+        "cirrus-vga",
+        "VGA",
+        "secondary-vga",
+        "virtio-gpu-pci",
+        "virtio-vga"
+    };
 
     g_test_init(&argc, &argv, NULL);
 
-    if (strcmp(arch, "alpha") == 0 || strcmp(arch, "i386") == 0 ||
-        strcmp(arch, "mips") == 0 || strcmp(arch, "x86_64") == 0) {
-        qtest_add_func("/display/pci/cirrus", pci_cirrus);
+    for (int i = 0; i < ARRAY_SIZE(devices); i++) {
+        if (qtest_has_device(devices[i])) {
+            char *testpath = g_strdup_printf("/display/pci/%s", devices[i]);
+            qtest_add_data_func(testpath, devices[i], test_vga);
+            g_free(testpath);
+        }
     }
-    qtest_add_func("/display/pci/stdvga", pci_stdvga);
-    qtest_add_func("/display/pci/secondary", pci_secondary);
-    qtest_add_func("/display/pci/multihead", pci_multihead);
-    qtest_add_func("/display/pci/virtio-gpu", pci_virtio_gpu);
-    if (g_str_equal(arch, "i386") || g_str_equal(arch, "x86_64") ||
-        g_str_equal(arch, "hppa") || g_str_equal(arch, "ppc64")) {
-        qtest_add_func("/display/pci/virtio-vga", pci_virtio_vga);
+
+    if (qtest_has_device("secondary-vga")) {
+        qtest_add_func("/display/pci/multihead", pci_multihead);
     }
 
     return g_test_run();
-- 
2.31.1