[PATCH 2/6] user32/tests: Add some (Enum|Change)DisplaySettings last error tests.

[Rémi Bernon]

Signed-off-by: Rémi Bernon 
---
 dlls/user32/tests/monitor.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/dlls/user32/tests/monitor.c b/dlls/user32/tests/monitor.c
index 131721d7ec1..bd89a8d9a40 100644
--- a/dlls/user32/tests/monitor.c
+++ b/dlls/user32/tests/monitor.c
@@ -225,6 +225,27 @@ static void test_EnumDisplayDevices(void)
     ok( broken( monitor_count == 0 ) || monitor_count > 0, "Expect at least one monitor found\n" );
 }

+static void test_EnumDisplaySettings(void)
+{
+    DISPLAY_DEVICEW adapter = {.cb = sizeof(DISPLAY_DEVICEW)};
+    DEVMODEW devmode = {.dmSize = sizeof(DEVMODEW)};
+    BOOL ret;
+
+    ret = EnumDisplayDevicesW( NULL, 0, &adapter, 0 );
+    ok( ret, "EnumDisplayDevicesW failed, error %u\n", GetLastError() );
+
+    SetLastError( 0xdeadbeef );
+    ret = EnumDisplaySettingsExW( adapter.DeviceName, ENUM_REGISTRY_SETTINGS, &devmode, 0 );
+    ok( ret, "EnumDisplaySettingsExW failed, error %u\n", GetLastError() );
+    todo_wine
+    ok( GetLastError() == 0xdeadbeef, "EnumDisplaySettingsExW set last error %u\n", GetLastError() );
+
+    SetLastError( 0xdeadbeef );
+    ret = EnumDisplaySettingsExW( adapter.DeviceName, ENUM_CURRENT_SETTINGS, &devmode, 0 );
+    ok( ret, "EnumDisplaySettingsExW failed, error %u\n", GetLastError() );
+    ok( GetLastError() == 0xdeadbeef, "EnumDisplaySettingsExW set last error %u\n", GetLastError() );
+}
+
 struct vid_mode
 {
     DWORD w, h, bpp, freq, fields;
@@ -521,8 +542,11 @@ static void test_ChangeDisplaySettingsEx(void)
         dm.dmSize = sizeof(dm);
         dm.dmFields = DM_POSITION | DM_PELSWIDTH | DM_PELSHEIGHT;
         dm.dmPosition = devices[0].original_mode.dmPosition;
+        SetLastError(0xdeadbeef);
         res = ChangeDisplaySettingsExA(devices[0].name, &dm, NULL, CDS_UPDATEREGISTRY | CDS_NORESET, NULL);
         ok(res == DISP_CHANGE_SUCCESSFUL, "ChangeDisplaySettingsExA %s returned unexpected %d\n", devices[0].name, res);
+        todo_wine
+        ok(GetLastError() == 0xdeadbeef, "ChangeDisplaySettingsExA set last error %u\n", GetLastError());
         res = ChangeDisplaySettingsExA(NULL, NULL, NULL, 0, NULL);
         ok(res == DISP_CHANGE_SUCCESSFUL ||
                 broken(res == DISP_CHANGE_FAILED), /* win8 TestBot */
@@ -538,8 +562,11 @@ static void test_ChangeDisplaySettingsEx(void)
         ok(count == old_count, "Expect monitor count %d, got %d\n", old_count, count);

/* Restore registry settings */
+        SetLastError(0xdeadbeef);
         res = ChangeDisplaySettingsExA(devices[0].name, &devices[0].original_mode, NULL,
                 CDS_UPDATEREGISTRY | CDS_NORESET, NULL);
+        todo_wine
+        ok(GetLastError() == 0xdeadbeef, "ChangeDisplaySettingsExA set last error %u\n", GetLastError());
         ok(res == DISP_CHANGE_SUCCESSFUL ||
                 broken(res == DISP_CHANGE_BADPARAM) || /* win10 */
                 broken(res == DISP_CHANGE_FAILED), /* win8 TestBot */
@@ -563,8 +590,11 @@ static void test_ChangeDisplaySettingsEx(void)
         dm.dmSize = sizeof(dm);
         dm.dmFields = DM_POSITION;
         dm.dmPosition = devices[1].original_mode.dmPosition;
+        SetLastError(0xdeadbeef);
         res = ChangeDisplaySettingsExA(devices[1].name, &dm, NULL, CDS_UPDATEREGISTRY | CDS_NORESET, NULL);
         ok(res == DISP_CHANGE_SUCCESSFUL, "ChangeDisplaySettingsExA %s returned unexpected %d\n", devices[1].name, res);
+        todo_wine
+        ok(GetLastError() == 0xdeadbeef, "ChangeDisplaySettingsExA set last error %u\n", GetLastError());
         res = ChangeDisplaySettingsExA(devices[1].name, NULL, NULL, 0, NULL);
         ok(res == DISP_CHANGE_SUCCESSFUL, "ChangeDisplaySettingsExA %s returned unexpected %d\n", devices[1].name, res);

@@ -2333,6 +2363,7 @@ START_TEST(monitor)
 {
     init_function_pointers();
     test_EnumDisplayDevices();
+    test_EnumDisplaySettings();
     test_ChangeDisplaySettingsEx();
     test_DisplayConfigSetDeviceInfo();
     test_EnumDisplayMonitors();