test(core): move integration lnd health check to bats (#3914)

bats/core/api/onchain-send.bats

@@ -25,13 +25,6 @@ teardown() {
    fi
 }
 
-grep_in_trigger_logs() {
-  cat_trigger \
-    | awk -F'│ ' '{print $2}' \
-    | grep $1
-  return "$?"
-}
-
 wait_for_new_payout_id() {
   prior_id="$1"
 

bats/core/api/trigger.bats

@@ -0,0 +1,22 @@
+load "../../helpers/trigger.bash"
+
+@test "trigger: lnds health check" {
+  lnd1_starts_before=$(grep_in_trigger_logs "localhost:10009.*lnd.*started" | wc -l)
+  lnd2_starts_before=$(grep_in_trigger_logs "localhost:10010.*lnd.*started" | wc -l)
+
+  # Stop trigger
+  touch $TRIGGER_STOP_FILE
+  retry 10 1 trigger_is_stopped || exit 1
+
+  # Start trigger
+  rm $TRIGGER_STOP_FILE
+  retry 30 1 trigger_is_started
+
+  lnd1_starts_after=$(grep_in_trigger_logs "localhost:10009.*lnd.*started" | wc -l)
+  lnd1_diff="$(( $lnd1_starts_after - $lnd1_starts_before ))"
+  [[ "$lnd1_diff" == "1" ]] || exit 1
+
+  lnd2_starts_after=$(grep_in_trigger_logs "localhost:10010.*lnd.*started" | wc -l)
+  lnd2_diff="$(( $lnd2_starts_after - $lnd2_starts_before ))"
+  [[ "$lnd2_diff" == "1" ]] || exit 1
+}

bats/helpers/trigger.bash

@@ -23,3 +23,10 @@ trigger_is_started() {
 cat_trigger() {
   cat "$TILT_LOG_FILE" | grep 'api-trigger │ '
 }
+
+grep_in_trigger_logs() {
+  cat_trigger \
+    | awk -F'│ ' '{print $2}' \
+    | grep $1
+  return "$?"
+}