Adding documentation for GTS-to-WIS2 Gateway tests (#72)

New section to be added into the Global Services testing document.

Signed-off-by: Jeremy Tandy <[email protected]>

global-services-testing/sections/testing/gts-to-wis2-gateway.adoc

@@ -0,0 +1,17 @@
+[[gts-to-wis2-gateway-testing]]
+
+=== GTS-to-WIS2 Gateway testing
+
+No formal (e.g., automated) testing is required for the GTS-to-WIS2 Gateway.
+
+Each WIS Centre seeking to decommission its GTS Message Switch must check that all the bulletins they normally receive via GTS are available from at least one GTS-to-WIS2 Gateway.
+
+Each GISC should work with RTHs to validate that everything their affiliated centres are producing on GTS are available from each Gateway. 
+
+[sidebar]
+The assessment of the GTS bulletins being pubished via the GTS-to-WIS2 Gateways should be completed between 1-Jan-2025 and 31-Mar-2025.
+
+In summary, we propose to use “user” feedback to determine veracity and completeness of data published by each Gateway. 
+
+Performance testing is not required because each GTS-to-WIS2 Gateway has already demonstrated sustained throughput of bulletins to messages and data from GTS into WIS2.
+