Remove NTPServers duplicate values and null values

When saving the set NTPServers values from webUI, NTPServer may contain
duplicate values and null values and update them to D-Bus.

Now, need to parse and verify the value of the ntpServers attribute,and
remove duplicate values and null values.

Tested:save NTP and check it via D-Bus
without this patch:
NTPServers  property  as  3 "" "10.164.29.2" "10.164.29.2"

with this patch:
NTPServers  property  as  2 "" "10.164.29.2"

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I52291e4608efd635b179f3934c3d3e805afd2209

1 files changed, 21 insertions, 0 deletions

diff --git a/redfish-core/ut/stl_utils_test.cpp b/redfish-core/ut/stl_utils_test.cpp
new file mode 100644
index 0000000000..a5115bd910
--- /dev/null
+++ b/redfish-core/ut/stl_utils_test.cpp
@@ -0,0 +1,21 @@
+#include "utils/stl_utils.hpp"
+
+#include <gmock/gmock.h>
+
+TEST(STLUtilesTest, RemoveDuplicates)
+{
+    std::vector<std::string> strVec = {"s1", "s4", "s1", "s2", "", "s3", "s3"};
+
+    auto iter =
+        redfish::stl_utils::firstDuplicate(strVec.begin(), strVec.end());
+    EXPECT_EQ(*iter, "s3");
+
+    redfish::stl_utils::removeDuplicate(strVec);
+
+    EXPECT_EQ(strVec.size(), 5);
+    EXPECT_EQ(strVec[0], "s1");
+    EXPECT_EQ(strVec[1], "s4");
+    EXPECT_EQ(strVec[2], "s2");
+    EXPECT_EQ(strVec[3], "");
+    EXPECT_EQ(strVec[4], "s3");
+}