From f6a7d29e21aa0f8e8752296cbe9ec40c7909eb33 Mon Sep 17 00:00:00 2001
From: Ronnie Dutta <61982285+MetRonnie@users.noreply.github.com>
Date: Wed, 30 Oct 2024 15:25:51 +0000
Subject: [PATCH] Add test for suicide prereqs

---
 tests/integration/test_remove.py | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/tests/integration/test_remove.py b/tests/integration/test_remove.py
index 0b38ff945b..0469bddf05 100644
--- a/tests/integration/test_remove.py
+++ b/tests/integration/test_remove.py
@@ -340,3 +340,34 @@ async def test_prereqs(
         ('1/a2', None),
         ('1/b', None),
     }
+
+
+async def test_suicide(flow, scheduler, run, reflog, complete):
+    """Test that suicide prereqs are unset by `cylc remove`."""
+    schd: Scheduler = scheduler(
+        flow({
+            'scheduling': {
+                'graph': {
+                    'R1': '''
+                        a => b => c => d => x
+                        a & c => !x
+                    '''
+                },
+            },
+        }),
+        paused_start=False,
+    )
+    async with run(schd):
+        reflog_triggers: set = reflog(schd)
+        await complete(schd, '1/b')
+        await run_cmd(remove_tasks(schd, ['1/a'], [FLOW_ALL]))
+        await complete(schd)
+
+    assert reflog_triggers == {
+        ('1/a', None),
+        ('1/b', ('1/a',)),
+        ('1/c', ('1/b',)),
+        ('1/d', ('1/c',)),
+        # 1/x not suicided as 1/a was removed:
+        ('1/x', ('1/d',)),
+    }