msi: Test and handle the case where the SourceList key does not exist and the…

dlls/msi/msi.c

@@ -791,8 +791,15 @@ static UINT MSI_GetProductInfo(LPCWSTR szProduct, LPCWSTR szAttribute,
         if (!lstrcmpW(szAttribute, INSTALLPROPERTY_PACKAGENAMEW))
         {
             res = RegOpenKeyW(prodkey, sourcelist, &source);
-            if (res == ERROR_SUCCESS)
-                val = msi_reg_get_value(source, szAttribute, &type);
+            if (res != ERROR_SUCCESS)
+            {
+                r = ERROR_UNKNOWN_PRODUCT;
+                goto done;
+            }
+
+            val = msi_reg_get_value(source, szAttribute, &type);
+            if (!val)
+                val = empty;
 
             RegCloseKey(source);
         }

dlls/msi/tests/msi.c

@@ -3649,12 +3649,31 @@ static void test_MsiGetProductInfo(void)
     ok(!lstrcmpA(buf, "42"), "Expected \"42\", got \"%s\"\n", buf);
     ok(sz == 2, "Expected 2, got %d\n", sz);
 
+    /* SourceList key does not exist */
+    sz = MAX_PATH;
+    lstrcpyA(buf, "apple");
+    r = MsiGetProductInfoA(prodcode, INSTALLPROPERTY_PACKAGENAME, buf, &sz);
+    ok(r == ERROR_UNKNOWN_PRODUCT,
+       "Expected ERROR_UNKNOWN_PRODUCT, got %d\n", r);
+    ok(!lstrcmpA(buf, "apple"),
+       "Expected buf to be unchanged, got \"%s\"\n", buf);
+    ok(sz == MAX_PATH, "Expected sz to be unchanged, got %d\n", sz);
+
     res = RegCreateKeyA(prodkey, "SourceList", &source);
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);
 
+    /* SourceList key exists, but PackageName val does not exist */
+    sz = MAX_PATH;
+    lstrcpyA(buf, "apple");
+    r = MsiGetProductInfoA(prodcode, INSTALLPROPERTY_PACKAGENAME, buf, &sz);
+    ok(r == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", r);
+    ok(!lstrcmpA(buf, ""), "Expected \"\", got \"%s\"\n", buf);
+    ok(sz == 0, "Expected 0, got %d\n", sz);
+
     res = RegSetValueExA(source, "PackageName", 0, REG_SZ, (LPBYTE)"packname", 9);
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);
 
+    /* PackageName val exists */
     sz = MAX_PATH;
     lstrcpyA(buf, "apple");
     r = MsiGetProductInfoA(prodcode, INSTALLPROPERTY_PACKAGENAME, buf, &sz);