Restore wine access after program loses and regains focus.

tests/foreground_focus_test.py

@@ -0,0 +1,29 @@
+"""Run the foreground fixture in its own configured Wine virtual desktop."""
+import os
+from pathlib import Path
+import subprocess
+import sys
+
+buildDir = Path(sys.argv[1]).resolve()
+env = os.environ.copy()
+env.update(WINEPREFIX=str(buildDir / "focus-prefix"),
+           CTHULHU_WINE_ACCESS_MANAGED="1", WINEDEBUG="-all",
+           WINEDLLOVERRIDES="mscoree,mshtml=")
+try:
+    for key, value, data in (
+        (r"HKCU\Software\Wine\Explorer", "Desktop", "WineAccessFocusFixture"),
+        (r"HKCU\Software\Wine\Explorer\Desktops", "WineAccessFocusFixture", "800x600"),
+    ):
+        subprocess.run(["wine", "reg", "add", key, "/v", value,
+                        "/t", "REG_SZ", "/d", data, "/f"],
+                       env=env, check=True, timeout=40)
+    # The next loader must create the configured desktop. Wait for this test
+    # prefix's old server to stop, without touching any user application.
+    subprocess.run(["wineserver", "-k"], env=env, check=True, timeout=5)
+    subprocess.run(["wineserver", "-w"], env=env, check=True, timeout=5)
+    result = subprocess.run([str(buildDir / "foreground-focus-test.exe"),
+                             str(buildDir / "foreground-fixture.exe")],
+                            env=env, timeout=20)
+    sys.exit(result.returncode)
+finally:
+    subprocess.run(["wineserver", "-k"], env=env, timeout=5)