Fix test that depends on order of icp vs cycling mode in the wflow config

Author: MetRonnie

cylc/flow/config.py

@@ -680,9 +680,10 @@ def prelim_process_graph(self) -> None:
             raise WorkflowConfigError('No workflow dependency graph defined.')
 
         if (
-            'cycling mode' not in self.cfg['scheduling'] and
-            self.cfg['scheduling'].get('initial cycle point', '1') == '1' and
-            all(item in ['graph', '1', 'R1'] for item in graphdict)
+            self.cfg['scheduling'].get('cycling mode', INTEGER_CYCLING_TYPE)
+            == INTEGER_CYCLING_TYPE
+            and self.cfg['scheduling'].get('initial cycle point', '1') == '1'
+            and all(item in ['graph', '1', 'R1'] for item in graphdict)
         ):
             # Pure acyclic graph, assume integer cycling mode with '1' cycle
             self.cfg['scheduling']['cycling mode'] = INTEGER_CYCLING_TYPE

tests/functional/startup/01-log-flow-config.t

@@ -30,6 +30,7 @@ init_workflow "${TEST_NAME_BASE}" <<'__FLOW_CONFIG__'
         stall timeout = PT0S
         restart timeout = PT0S  # shut down when restarted with empty pool
 [scheduling]
+    cycling mode = integer
     [[graph]]
         R1 = reloader => whatever
 [runtime]