expenseAllocation: Set default values by account.

conservancy_beancount/plugin/meta_expense_allocation.py

@@ -30,3 +30,11 @@ class MetaExpenseAllocation(core.PostingChecker):
     ACCOUNTS = ('Expenses:',)
     METADATA_KEY = 'expenseAllocation'
     VALUES_ENUM = ExpenseAllocations
+    DEFAULT_VALUES = {
+        'Expenses:Services:Accounting': VALUES_ENUM.administration,
+        'Expenses:Services:Administration': VALUES_ENUM.administration,
+        'Expenses:Services:Fundraising': VALUES_ENUM.fundraising,
+    }
+
+    def _default_value(self, txn, post):
+        return self.DEFAULT_VALUES.get(post.account, self.VALUES_ENUM.program).value

tests/test_meta_expenseAllocation.py

@@ -92,3 +92,20 @@ def test_non_expense_accounts_skipped(account):
     checker = meta_expense_allocation.MetaExpenseAllocation()
     errors = checker.check(txn, txn.postings[0])
     assert not errors
+
+@pytest.mark.parametrize('account,set_value', [
+    ('Expenses:Services:Accounting', 'administration'),
+    ('Expenses:Services:Administration', 'administration'),
+    ('Expenses:Services:Advocacy', 'program'),
+    ('Expenses:Services:Development', 'program'),
+    ('Expenses:Services:Fundraising', 'fundraising'),
+])
+def test_default_values(account, set_value):
+    txn = testutil.Transaction(postings=[
+        ('Liabilites:CreditCard', -25),
+        (account, 25),
+    ])
+    checker = meta_expense_allocation.MetaExpenseAllocation()
+    errors = checker.check(txn, txn.postings[-1])
+    assert not errors
+    assert txn.postings[-1].meta['expenseAllocation'] == set_value