Break out set time function and unit test it

This function is something that's easily unit tested.  Do it.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I8d664c77ec4b3a9886128597449c5f9c041b86b3

1 files changed, 32 insertions, 0 deletions

diff --git a/test/redfish-core/include/utils/time_utils_test.cpp b/test/redfish-core/include/utils/time_utils_test.cpp
index 035d8ce95b..873a385d1e 100644
--- a/test/redfish-core/include/utils/time_utils_test.cpp
+++ b/test/redfish-core/include/utils/time_utils_test.cpp
@@ -139,5 +139,37 @@ TEST(Utility, GetDateTimeUintUs)
               "1970-01-01T00:00:00.000000+00:00");
 }
 
+TEST(Utility, DateStringToEpoch)
+{
+    EXPECT_EQ(dateStringToEpoch("2021-11-30T22:41:35.123456+00:00"),
+              usSinceEpoch{1638312095123456});
+    // no timezone
+    EXPECT_EQ(dateStringToEpoch("2021-11-30T22:41:35.123456"),
+              usSinceEpoch{1638312095123456});
+    // Milliseconds precision
+    EXPECT_EQ(dateStringToEpoch("2021-11-30T22:41:35.123"),
+              usSinceEpoch{1638312095123000});
+    // Seconds precision
+    EXPECT_EQ(dateStringToEpoch("2021-11-30T22:41:35"),
+              usSinceEpoch{1638312095000000});
+
+    // Non zero timezone
+    EXPECT_EQ(dateStringToEpoch("2021-11-30T22:41:35.123456+04:00"),
+              usSinceEpoch{1638297695123456});
+
+    // Epoch
+    EXPECT_EQ(dateStringToEpoch("1970-01-01T00:00:00.000000+00:00"),
+              usSinceEpoch{0});
+
+    // Max time
+    EXPECT_EQ(dateStringToEpoch("9999-12-31T23:59:59.999999+00:00"),
+              usSinceEpoch{253402300799999999});
+
+    // Underflow
+    // Currently gives wrong result
+    // EXPECT_EQ(dateStringToEpoch("1969-12-30T23:59:59.999999+00:00"),
+    //          std::nullopt);
+}
+
 } // namespace
 } // namespace redfish::time_utils