mapi32/tests: Skip tests if no default email client is installed.

dlls/mapi32/tests/Makefile.in

@@ -3,7 +3,7 @@ TOPOBJDIR = ../../..
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 TESTDLL   = mapi32.dll
-IMPORTS   = kernel32
+IMPORTS   = advapi32 kernel32
 
 CTESTS = \
 	imalloc.c \

dlls/mapi32/tests/imalloc.c

@@ -26,6 +26,7 @@
 #include "winerror.h"
 #include "winnt.h"
 #include "mapiutil.h"
+#include "mapi32_test.h"
 
 static HMODULE hMapi32 = 0;
 
@@ -88,6 +89,12 @@ START_TEST(imalloc)
 {
     SCODE ret;
 
+    if (!HaveDefaultMailClient())
+    {
+        win_skip("No default mail client installed\n");
+        return;
+    }
+
     hMapi32 = LoadLibraryA("mapi32.dll");
 
     pScInitMapiUtil = (void*)GetProcAddress(hMapi32, "ScInitMapiUtil@4");

dlls/mapi32/tests/mapi32_test.h

@@ -0,0 +1,62 @@
+/*
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/*
+ * Return FALSE if no default mail client is installed.
+ */
+static BOOL HaveDefaultMailClient(void)
+{
+    HKEY Key;
+    DWORD Type, Size;
+    BYTE Buffer[64];
+    BOOL HasHKCUKey;
+
+    /* We check the default value of both HKCU\Software\Clients\Mail and
+     * HKLM\Software\Clients\Mail, if one of them is present there is a default
+     * mail client. If neither of these keys is present, we might be running
+     * on an old Windows version (W95, NT4) and we assume a default mail client
+     * might be available. Only if one of the keys is present, but there is
+     * no default value do we assume there is no default client. */
+    if (RegOpenKeyExA(HKEY_CURRENT_USER, "SOFTWARE\\Clients\\Mail", 0, KEY_QUERY_VALUE, &Key) == ERROR_SUCCESS)
+    {
+        Size = sizeof(Buffer);
+        /* Any return value besides ERROR_FILE_NOT_FOUND (including success,
+           ERROR_MORE_DATA) indicates the value is present */
+        if (RegQueryValueExA(Key, NULL, NULL, &Type, Buffer, &Size) != ERROR_FILE_NOT_FOUND)
+        {
+            RegCloseKey(Key);
+            return TRUE;
+        }
+        RegCloseKey(Key);
+        HasHKCUKey = TRUE;
+    }
+    else
+        HasHKCUKey = FALSE;
+
+    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, "SOFTWARE\\Clients\\Mail", 0, KEY_QUERY_VALUE, &Key) == ERROR_SUCCESS)
+    {
+        Size = sizeof(Buffer);
+        if (RegQueryValueExA(Key, NULL, NULL, &Type, Buffer, &Size) != ERROR_FILE_NOT_FOUND)
+        {
+            RegCloseKey(Key);
+            return TRUE;
+        }
+        RegCloseKey(Key);
+        return FALSE;
+    }
+
+    return ! HasHKCUKey;
+}

dlls/mapi32/tests/prop.c

@@ -27,6 +27,7 @@
 #include "initguid.h"
 #include "mapiutil.h"
 #include "mapitags.h"
+#include "mapi32_test.h"
 
 static HMODULE hMapi32 = 0;
 
@@ -1360,6 +1361,12 @@ START_TEST(prop)
 {
     SCODE ret;
 
+    if (!HaveDefaultMailClient())
+    {
+        win_skip("No default mail client installed\n");
+        return;
+    }
+
     if(!InitFuncPtrs())
     {
         win_skip("Needed functions are not available\n");

dlls/mapi32/tests/util.c

@@ -26,6 +26,7 @@
 #include "winnt.h"
 #include "mapiutil.h"
 #include "mapitags.h"
+#include "mapi32_test.h"
 
 static HMODULE hMapi32 = 0;
 
@@ -172,6 +173,12 @@ START_TEST(util)
 {
     SCODE ret;
 
+    if (!HaveDefaultMailClient())
+    {
+        win_skip("No default mail client installed\n");
+        return;
+    }
+
     hMapi32 = LoadLibraryA("mapi32.dll");
 
     pScInitMapiUtil = (void*)GetProcAddress(hMapi32, "ScInitMapiUtil@4");