user32/tests: Also test device caps on a released DC.

dlls/user32/tests/dce.c

@@ -40,7 +40,7 @@ static void test_dc_attributes(void)
 {
     HDC hdc, old_hdc;
     HDC hdcs[20];
-    INT i, rop, def_rop;
+    INT i, rop, def_rop, caps;
     BOOL found_dc;
 
     /* test cache DC */
@@ -118,8 +118,29 @@ static void test_dc_attributes(void)
     ok( rop == 0, "got %d\n", rop );
     rop = GetROP2( old_hdc );
     ok( rop == 0, "got %d\n", rop );
+    caps = GetDeviceCaps( old_hdc, HORZRES );
+    ok( caps == 0, "got %d\n", caps );
+    caps = GetDeviceCaps( old_hdc, VERTRES );
+    ok( caps == 0, "got %d\n", caps );
+    caps = GetDeviceCaps( old_hdc, NUMCOLORS );
+    ok( caps == 0, "got %d\n", caps );
     ok( WindowFromDC( old_hdc ) == 0, "wrong window\n" );
 
+    hdc = GetDC(0);
+    caps = GetDeviceCaps( hdc, HORZRES );
+    ok( caps != 0, "got %d\n", caps );
+    caps = GetDeviceCaps( hdc, VERTRES );
+    ok( caps != 0, "got %d\n", caps );
+    caps = GetDeviceCaps( hdc, NUMCOLORS );
+    ok( caps != 0, "got %d\n", caps );
+    ReleaseDC( 0, hdc );
+    caps = GetDeviceCaps( hdc, HORZRES );
+    ok( caps == 0, "got %d\n", caps );
+    caps = GetDeviceCaps( hdc, VERTRES );
+    ok( caps == 0, "got %d\n", caps );
+    caps = GetDeviceCaps( hdc, NUMCOLORS );
+    ok( caps == 0, "got %d\n", caps );
+
     /* test own DC */
 
     hdc = GetDC( hwnd_owndc );