EES-4389 - breaking Next.js ISR time into distinct wait in the UI tes…

…ts, to allow it to be fine-tuned for different environments

tests/robot-tests/.env.example

@@ -12,6 +12,7 @@ EXPIRED_INVITE_USER_EMAIL= # Expired Invite user email
 EXPIRED_INVITE_USER_PASSWORD= # Expired Invite user password
 RELEASE_COMPLETE_WAIT=120  # Time to wait for a release to publish (in seconds)
 WAIT_CACHE_EXPIRY=2  # Time to wait for the environment's various caches to expire (in seconds. Local = 2, Dev = 10)
+WAIT_NEXT_ISR=5  # Time for Next.js to perform Incremental Static Regeneration (generate a new version of a stale page in the background)
 WAIT_MEDIUM=120  # Variable used throughout tests (in seconds)
 WAIT_SMALL=45 # Variable used throughout tests (in seconds)
 WAIT_LONG=180  # Variable used throughout tests (in seconds)

tests/robot-tests/run_tests.py

@@ -179,6 +179,7 @@
     "FAIL_TEST_SUITES_FAST",
     "IDENTITY_PROVIDER",
     "WAIT_CACHE_EXPIRY",
+    "WAIT_NEXT_ISR",
     "EXPIRED_INVITE_USER_EMAIL",
     "PUBLISHER_FUNCTIONS_URL",
 ]

tests/robot-tests/tests/libs/public-common.robot

@@ -61,9 +61,8 @@ user checks methodology note
     user waits until element contains    css:#methodologyNotes li:nth-of-type(${number}) time    ${displayDate}
     user waits until element contains    css:#methodologyNotes li:nth-of-type(${number}) p    ${content}
 
-# Next.js will have returned a stale cached page for the last request and will have created a new cached page in
-# the background in the meantime, so request the page again.
-
 user reloads the stale cached page
-    sleep    3
+    # Next.js will have returned a stale cached page for the last request and will have created a new cached page in
+    # the background in the meantime using Incremental Static Regeneration, so request the page again.
+    sleep    %{WAIT_NEXT_ISR}
     user reloads page