Added test case to verify invalid date and time

Changes:
   - Verify Setting Invalid Date And Time Is Not Allowed
Tested:
   - Ran the test case from sandbox successfully

Change-Id: I00bf19b6ac3b37e79732d569dc8a63c7b3ac080a
Signed-off-by: sarandev3 <saranyad@in.ibm.com>
diff --git a/gui/gui_test/settings_menu/test_date_and_time_sub_menu.robot b/gui/gui_test/settings_menu/test_date_and_time_sub_menu.robot
index a10095c..d9399e4 100644
--- a/gui/gui_test/settings_menu/test_date_and_time_sub_menu.robot
+++ b/gui/gui_test/settings_menu/test_date_and_time_sub_menu.robot
@@ -19,7 +19,7 @@
 ${xpath_ntp_server2}           //input[@data-test-id="dateTime-input-ntpServer2"]
 ${xpath_ntp_server3}           //input[@data-test-id="dateTime-input-ntpServer3"]
 ${xpath_select_save_settings}  //button[@data-test-id="dateTime-button-saveSettings"]
-
+${xpath_invalid_format_message}      //*[contains(text(), "Invalid format")]
 
 *** Test Cases ***
 
@@ -172,6 +172,19 @@
     Should contain  ${cli_date_time}  ${manual_date}  ${manual_time}
 
 
+Verify Setting Invalid Date And Time Is Not Allowed
+    [Documentation]  Verify if invalid date and invalid time input is given,
+    ...  it should throw error.
+    [Tags]  Verify_Setting_Invalid_Date_And_Time_Is_Not_Allowed
+    [Setup]  Setup To Power Off And Navigate
+
+    Click Element At Coordinates  ${xpath_select_manual}  0  0
+    Input Text  ${xpath_manual_date}  2023-18-48
+    Page Should Contain Element  ${xpath_invalid_format_message}
+    Input Text  ${xpath_manual_time}  29:48
+    Page Should Contain Element  ${xpath_invalid_format_message}
+
+
 *** Keywords ***
 
 Suite Setup Execution