Add functional test

tests/functional/remote/08-symlink-dir-target-exist.t

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+# THIS FILE IS PART OF THE CYLC WORKFLOW ENGINE.
+# Copyright (C) NIWA & British Crown (Met Office) & Contributors.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# -----------------------------------------------------------------------------
+# Test remote init fails if symlink dir target already exists
+
+export REQUIRE_PLATFORM='loc:remote fs:indep comms:tcp'
+. "$(dirname "$0")/test_header"
+set_test_number 5
+
+SSH_CMD="$(cylc config -d -i "[platforms][${CYLC_TEST_PLATFORM}]ssh command")"
+
+create_test_global_config "" "
+[install]
+    [[symlink dirs]]
+        [[[${CYLC_TEST_INSTALL_TARGET}]]]
+            run = \$TMPDIR/\$USER/sym-run
+"
+install_workflow "${TEST_NAME_BASE}" basic
+
+run_ok "${TEST_NAME_BASE}-val" cylc validate "$WORKFLOW_NAME"
+
+# Run once to setup symlink dirs on remote install target
+workflow_run_ok "${TEST_NAME_BASE}-run" cylc play --no-detach "$WORKFLOW_NAME"
+
+# Remove remote run dir symlink (but not its target)
+$SSH_CMD "$CYLC_TEST_HOST" "rm -rf ~/cylc-run/${WORKFLOW_NAME}"
+
+# New run should abort
+delete_db
+TEST_NAME="${TEST_NAME_BASE}-run-again"
+workflow_run_fail "$TEST_NAME" cylc play --no-detach "$WORKFLOW_NAME"
+
+grep_ok "ERROR - platform: .* initialisation did not complete" "${TEST_NAME}.stderr"
+grep_ok "WorkflowFilesError: Symlink dir target already exists" "${TEST_NAME}.stderr"
+
+# Clean up remote symlink dir target
+# shellcheck disable=SC2016
+$SSH_CMD "$CYLC_TEST_HOST" 'rm -rf "${TMPDIR}/${USER}/sym-run"'
+
+purge

tests/functional/remote/basic/flow.cylc

@@ -1,5 +1,7 @@
 #!Jinja2
-
+[scheduler]
+    [[events]]
+        stall timeout = PT0S
 [scheduling]
     [[graph]]
         R1 = foo