From d41bc5e9b62ff145113a00044f822091e518dc95 Mon Sep 17 00:00:00 2001
From: Brett Smith <brettcsmith@brettcsmith.org>
Date: Wed, 22 Apr 2020 12:02:06 -0400
Subject: [PATCH] reports: Add RelatedPostings.clear() method.

---
 conservancy_beancount/reports/core.py  | 3 +++
 tests/test_reports_related_postings.py | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/conservancy_beancount/reports/core.py b/conservancy_beancount/reports/core.py
index 1d271a7..3a0fbbe 100644
--- a/conservancy_beancount/reports/core.py
+++ b/conservancy_beancount/reports/core.py
@@ -126,6 +126,9 @@ class RelatedPostings(Sequence[data.Posting]):
     def add(self, post: data.Posting) -> None:
         self._postings.append(post)
 
+    def clear(self) -> None:
+        self._postings.clear()
+
     def iter_with_balance(self) -> Iterable[Tuple[data.Posting, Balance]]:
         balance = MutableBalance()
         for post in self:
diff --git a/tests/test_reports_related_postings.py b/tests/test_reports_related_postings.py
index f0bb60b..1848c0f 100644
--- a/tests/test_reports_related_postings.py
+++ b/tests/test_reports_related_postings.py
@@ -78,6 +78,13 @@ def test_balance_credit_card(credit_card_cycle):
         assert related.balance() == testutil.balance_map(USD=expected)
     assert expected == 0
 
+def test_clear():
+    related = core.RelatedPostings()
+    related.add(testutil.Posting('Income:Donations', -10))
+    assert related.balance()
+    related.clear()
+    assert not related.balance()
+
 def check_iter_with_balance(entries):
     expect_posts = [txn.postings[0] for txn in entries]
     expect_balances = []