setupapi/tests: Use separate directory for SetupGetInfFileListW.

dlls/setupapi/tests/install.c

@@ -478,6 +478,7 @@ static void test_inffilelist(void)
         "Signature=\"$Chicago$\"";
 
     WCHAR *p, *ptr;
+    char dirA[MAX_PATH];
     WCHAR dir[MAX_PATH] = { 0 };
     WCHAR buffer[MAX_PATH] = { 0 };
     DWORD expected, outsize;
@@ -510,9 +511,29 @@ static void test_inffilelist(void)
     todo_wine
     ok(!ret, "expected SetupGetInfFileListW to fail!\n");
 
+    /* create a private directory, the temp directory may contain some
+     * inf files left over from old installations
+     */
+    if (!GetTempFileNameA(CURR_DIR, "inftest", 1, dirA))
+    {
+        win_skip("GetTempFileNameA failed with error %d\n", GetLastError());
+        return;
+    }
+    if (!CreateDirectoryA(dirA, NULL ))
+    {
+        win_skip("CreateDirectoryA failed with error %d\n", GetLastError());
+        return;
+    }
+    if (!SetCurrentDirectoryA(dirA))
+    {
+        win_skip("SetCurrentDirectoryA failed with error %d\n", GetLastError());
+        RemoveDirectoryA(dirA);
+        return;
+    }
+
+    MultiByteToWideChar(CP_ACP, 0, dirA, -1, dir, MAX_PATH);
     /* check a not existing directory
      */
-    MultiByteToWideChar(CP_ACP, 0, CURR_DIR, -1, dir, MAX_PATH);
     ptr = dir + lstrlenW(dir);
     MultiByteToWideChar(CP_ACP, 0, "\\not_existent", -1, ptr, MAX_PATH - lstrlenW(dir));
     outsize = 0xffffffff;
@@ -569,6 +590,8 @@ static void test_inffilelist(void)
     DeleteFile(inffile);
     DeleteFile(inffile2);
     DeleteFile(invalid_inf);
+    SetCurrentDirectoryA(CURR_DIR);
+    RemoveDirectoryA(dirA);
 }
 
 START_TEST(install)