t: add tests for --force option

Problem: There exist no tests for calling delete_user() with the force
option set.

Add some tests.

t/python/t1002_user_cmds.py

@@ -282,6 +282,40 @@ def test_16_edit_user_fairshare(self):
         fairshare = cur.fetchall()
         self.assertEqual(fairshare[0][0], 0.95)
 
+    # actually remove a user from the association_table
+    def test_17_delete_user_force(self):
+        cur = acct_conn.cursor()
+        select_stmt = "SELECT * FROM association_table WHERE username='test_user5'"
+        cur.execute(select_stmt)
+        result = cur.fetchall()
+        self.assertEqual(len(result), 1)
+
+        # pass force=True to actually remove the user row from the table
+        u.delete_user(acct_conn, username="test_user5", bank="A", force=True)
+        cur.execute(select_stmt)
+        result = cur.fetchall()
+        self.assertEqual(len(result), 0)
+
+    # actually remove a user from the association_table where their default
+    # bank needs to be updated
+    def test_18_delete_user_force_update_bank(self):
+        cur = acct_conn.cursor()
+        select_stmt = (
+            "SELECT default_bank FROM association_table WHERE username='test_user6'"
+        )
+        # add two associations
+        u.add_user(acct_conn, username="test_user6", bank="A")
+        u.add_user(acct_conn, username="test_user6", bank="B")
+        cur.execute(select_stmt)
+        default_bank = cur.fetchall()
+        self.assertEqual(default_bank[0][0], "A")
+
+        # delete one of the rows with force=True
+        u.delete_user(acct_conn, username="test_user6", bank="A", force=True)
+        cur.execute(select_stmt)
+        default_bank = cur.fetchall()
+        self.assertEqual(default_bank[0][0], "B")
+
     # remove database and log file
     @classmethod
     def tearDownClass(self):

t/t1007-flux-account-users.t

@@ -122,6 +122,21 @@ test_expect_success 'remove a user account' '
 	grep -f ${EXPECTED_FILES}/deleted_user.expected deleted_user.out
 '
 
+test_expect_success 'remove a user with --force' '
+	flux account delete-user user5011 A --force &&
+	test_must_fail flux account view-user user5011 > user5011_nonexistent.out 2>&1 &&
+	grep "view-user: user user5011 not found in association_table" user5011_nonexistent.out
+'
+
+test_expect_success 'remove a user with --force/make sure default bank gets updated' '
+	flux account add-user --username=user5201 --bank=A &&
+	flux account add-user --username=user5201 --bank=B &&
+	flux account add-user --username=user5201 --bank=C &&
+	flux account delete-user --force user5201 A &&
+	flux account view-user user5201 > user5201.out &&
+	test $(grep -c "\"default_bank\": \"B\"" user5201.out) -eq 2 
+'
+
 test_expect_success 'remove flux-accounting DB' '
 	rm $(pwd)/FluxAccountingTest.db
 '