ci: fix log capture for envoy integration tests

The previous change, which moved test running to Go, appears to have
broken log capturing. I am not entirely sure why, but the run_tests
function seems to exit on the first error.

This change moves test teardown and log capturing out of run_test, and
has the go test runner call them when necessary.

test/integration/connect/envoy/main_test.go

@@ -51,7 +51,17 @@ func TestEnvoy(t *testing.T) {
 
 	for _, tc := range testcases {
 		t.Run(tc, func(t *testing.T) {
-			runCmd(t, "run_tests", "CASE_DIR="+tc)
+			caseDir := "CASE_DIR=" + tc
+
+			t.Cleanup(func() {
+				if t.Failed() {
+					runCmd(t, "capture_logs", caseDir)
+				}
+
+				runCmd(t, "test_teardown", caseDir)
+			})
+
+			runCmd(t, "run_tests", caseDir)
 		})
 	}
 }

test/integration/connect/envoy/run-tests.sh

@@ -125,6 +125,11 @@ function verify {
 }
 
 function capture_logs {
+  # exported to prevent docker-compose warning about unset var
+  export LOG_DIR="workdir/logs/${CASE_DIR}/${ENVOY_VERSION}"
+
+  init_vars
+
   echo "Capturing Logs"
   mkdir -p "$LOG_DIR"
   services="$REQUIRED_SERVICES consul-primary"
@@ -139,7 +144,6 @@ function capture_logs {
     source ${CASE_DIR}/capture.sh || true
   fi
 
-
   for cont in $services
   do
     echo "Capturing log for $cont"
@@ -195,80 +199,41 @@ function run_tests {
   docker cp workdir/. envoy_workdir_1:/workdir
 
   start_consul primary
-  if [ $? -ne 0 ]
-  then
-    capture_logs
-    return 1
-  fi
 
-  if is_set $REQUIRE_SECONDARY
-  then
+  if is_set $REQUIRE_SECONDARY; then
     start_consul secondary
-    if [ $? -ne 0 ]
-    then
-      capture_logs
-      return 1
-    fi
   fi
 
   echo "Setting up the primary datacenter"
   pre_service_setup primary
-  if [ $? -ne 0 ]
-  then
-    echo "Setting up the primary datacenter failed"
-    capture_logs
-    return 1
-  fi
 
-  if is_set $REQUIRE_SECONDARY
-  then
+  if is_set $REQUIRE_SECONDARY; then
     echo "Setting up the secondary datacenter"
     pre_service_setup secondary
-    if [ $? -ne 0 ]
-    then
-      echo "Setting up the secondary datacenter failed"
-      capture_logs
-      return 1
-    fi
   fi
 
   echo "Starting services"
   start_services
-  if [ $? -ne 0 ]
-  then
-    capture_logs
-    return 1
-  fi
 
   # Run the verify container and report on the output
   verify primary
-  TESTRESULT=$?
 
-  if is_set $REQUIRE_SECONDARY && test "$TESTRESULT" -eq 0
-  then
+  if is_set $REQUIRE_SECONDARY; then
     verify secondary
-    SECONDARYRESULT=$?
+  fi
+}
 
-    if [ "$SECONDARYRESULT" -ne 0 ]
-    then
-      TESTRESULT=$SECONDARYRESULT
-    fi
-  fi
+function test_teardown {
+    # Set a log dir to prevent docker-compose warning about unset var
+    export LOG_DIR="workdir/logs/"
 
-  if [ "$TESTRESULT" -ne 0 ]
-  then
-    capture_logs
-  fi
+    init_vars
 
     stop_services primary
 
-  if is_set $REQUIRE_SECONDARY
-  then
+    if is_set $REQUIRE_SECONDARY; then
       stop_services secondary
     fi
-
-
-  return $TESTRESULT
 }
 
 function suite_setup {