inetcomm: Implement IMimeBody_IsType(IBT_EMPTY).

dlls/inetcomm/mimeole.c

@@ -864,8 +864,17 @@ static HRESULT WINAPI MimeBody_IsType(
                              IMimeBody* iface,
                              IMSGBODYTYPE bodytype)
 {
-    FIXME("(%p)->(%d): stub\n", iface, bodytype);
-    return E_NOTIMPL;
+    MimeBody *This = impl_from_IMimeBody(iface);
+
+    TRACE("(%p)->(%d)\n", iface, bodytype);
+    switch(bodytype)
+    {
+    case IBT_EMPTY:
+        return This->data ? S_FALSE : S_OK;
+    default:
+        FIXME("Unimplemented bodytype %d - returning S_OK\n", bodytype);
+    }
+    return S_OK;
 }
 
 static HRESULT WINAPI MimeBody_SetDisplayName(

dlls/inetcomm/tests/mimeole.c

@@ -130,6 +130,8 @@ static void test_CreateBody(void)
     ok(hr == S_FALSE, "ret %08x\n", hr);
     hr = IMimeBody_IsContentType(body, NULL, "mixed");
     ok(hr == S_OK, "ret %08x\n", hr);
+    hr = IMimeBody_IsType(body, IBT_EMPTY);
+    ok(hr == S_OK, "got %08x\n", hr);
 
     hr = IMimeBody_SetData(body, IET_8BIT, "text", "plain", &IID_IStream, in);
     ok(hr == S_OK, "ret %08x\n", hr);
@@ -148,6 +150,9 @@ static void test_CreateBody(void)
     ok(offsets.cbBodyStart == 0, "got %d\n", offsets.cbBodyStart);
     ok(offsets.cbBodyEnd == 0, "got %d\n", offsets.cbBodyEnd);
 
+    hr = IMimeBody_IsType(body, IBT_EMPTY);
+    ok(hr == S_FALSE, "got %08x\n", hr);
+
     hr = MimeOleGetAllocator(&alloc);
     ok(hr == S_OK, "ret %08x\n", hr);