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From: Phillip Wood <phillip.wood@talktalk.net>
To: Git Mailing List <git@vger.kernel.org>
Cc: Junio C Hamano <gitster@pobox.com>,
	"Brian M. Carlson" <sandals@crustytoothpaste.net>,
	Phillip Wood <phillip.wood@dunelm.org.uk>
Subject: [PATCH v2 5/9] t3701: add failing test for pathological context lines
Date: Mon, 19 Feb 2018 11:29:06 +0000
Message-ID: <20180219112910.24471-6-phillip.wood@talktalk.net> (raw)
In-Reply-To: <20180219112910.24471-1-phillip.wood@talktalk.net>

From: Phillip Wood <phillip.wood@dunelm.org.uk>

When a hunk is skipped by add -i the offsets of subsequent hunks are
not adjusted to account for any missing insertions due to the skipped
hunk. Most of the time this does not matter as apply uses the context
lines to apply the subsequent hunks in the correct place, however in
pathological cases the context lines will match at the now incorrect
offset and the hunk will be applied in the wrong place. The offsets of
hunks following an edited hunk that has had the number of insertions
or deletions changed also need to be updated in the same way. Add
failing tests to demonstrate this.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---

Notes:
    changes since v1:
     - changed edit test to use the existing fake editor and to strip
       the hunk header and some context lines as well as deleting an
       insertion
     - style fixes

 t/t3701-add-interactive.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 70748393f28c93f4bc5d43b07bd96bd208aba3e9..06c4747f506a1b05ccad0f9387e1fbd69cfd7784 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -511,4 +511,35 @@ test_expect_success 'status ignores dirty submodules (except HEAD)' '
 	! grep dirty-otherwise output
 '
 
+test_expect_success 'set up pathological context' '
+	git reset --hard &&
+	test_write_lines a a a a a a a a a a a >a &&
+	git add a &&
+	git commit -m a &&
+	test_write_lines c b a a a a a a a b a a a a >a &&
+	test_write_lines     a a a a a a a b a a a a >expected-1 &&
+	test_write_lines   b a a a a a a a b a a a a >expected-2 &&
+	# check editing can cope with missing header and deleted context lines
+	# as well as changes to other lines
+	test_write_lines +b " a" >patch
+'
+
+test_expect_failure 'add -p works with pathological context lines' '
+	git reset &&
+	printf "%s\n" n y |
+	git add -p &&
+	git cat-file blob :a >actual &&
+	test_cmp expected-1 actual
+'
+
+test_expect_failure 'add -p patch editing works with pathological context lines' '
+	git reset &&
+	test_set_editor "$FAKE_EDITOR" &&
+	# n q q below is in case edit fails
+	printf "%s\n" e y    n q q |
+	git add -p &&
+	git cat-file blob :a >actual &&
+	test_cmp expected-2 actual
+'
+
 test_done
-- 
2.16.1


  parent reply index

Thread overview: 79+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-13 10:44 [PATCH 0/4] Correct offsets of hunks when one is skipped Phillip Wood
2018-02-13 10:44 ` [PATCH 1/4] add -i: add function to format hunk header Phillip Wood
2018-02-13 10:44 ` [PATCH 2/4] t3701: add failing test for pathological context lines Phillip Wood
2018-02-13 20:35   ` Junio C Hamano
2018-02-13 10:44 ` [PATCH 3/4] add -p: Adjust offsets of subsequent hunks when one is skipped Phillip Wood
2018-02-13 10:44 ` [PATCH 4/4] add -p: calculate offset delta for edited patches Phillip Wood
2018-02-13 23:56 ` [PATCH 0/4] Correct offsets of hunks when one is skipped brian m. carlson
2018-02-19 13:01   ` Phillip Wood
2018-02-19 11:29 ` [PATCH v2 0/9] " Phillip Wood
2018-02-19 11:29   ` [PATCH v2 1/9] add -i: add function to format hunk header Phillip Wood
2018-02-20 18:21     ` Junio C Hamano
2018-02-19 11:29   ` [PATCH v2 2/9] t3701: indent here documents Phillip Wood
2018-02-19 18:36     ` Eric Sunshine
2018-02-19 11:29   ` [PATCH v2 3/9] t3701: use test_write_lines and write_script Phillip Wood
2018-02-19 18:47     ` Eric Sunshine
2018-02-20 17:19       ` Junio C Hamano
2018-02-21 11:26         ` Phillip Wood
2018-02-19 11:29   ` [PATCH v2 4/9] t3701: don't hard code sha1 hash values Phillip Wood
2018-02-19 18:52     ` Eric Sunshine
2018-02-20 17:39     ` Junio C Hamano
2018-02-21 11:42       ` Phillip Wood
2018-02-21 16:58         ` Junio C Hamano
2018-02-19 11:29   ` Phillip Wood [this message]
2018-02-21 11:28     ` [PATCH v2 5/9] t3701: add failing test for pathological context lines Phillip Wood
2018-02-19 11:29   ` [PATCH v2 6/9] add -p: Adjust offsets of subsequent hunks when one is skipped Phillip Wood
2018-02-19 11:29   ` [PATCH v2 7/9] add -p: calculate offset delta for edited patches Phillip Wood
2018-02-19 11:29   ` [PATCH v2 8/9] add -p: fix counting when splitting and coalescing Phillip Wood
2018-02-19 11:29   ` [PATCH v2 9/9] add -p: don't rely on apply's '--recount' option Phillip Wood
2018-02-20 18:50     ` Junio C Hamano
2018-02-27 11:03 ` [PATCH v3 0/9] Correct offsets of hunks when one is skipped Phillip Wood
2018-02-27 11:03   ` [PATCH v3 1/9] add -i: add function to format hunk header Phillip Wood
2018-02-27 11:03   ` [PATCH v3 2/9] t3701: indent here documents Phillip Wood
2018-02-27 22:35     ` Junio C Hamano
2018-02-28 11:00       ` Phillip Wood
2018-02-28 15:37         ` Junio C Hamano
2018-03-01 10:57           ` Phillip Wood
2018-03-01 15:58             ` Junio C Hamano
2018-02-27 11:03   ` [PATCH v3 3/9] t3701: use test_write_lines and write_script Phillip Wood
2018-02-27 11:03   ` [PATCH v3 4/9] t3701: don't hard code sha1 hash values Phillip Wood
2018-02-27 22:42     ` Junio C Hamano
2018-02-28 11:03       ` Phillip Wood
2018-02-28 11:10         ` Phillip Wood
2018-02-27 11:04   ` [PATCH v3 5/9] t3701: add failing test for pathological context lines Phillip Wood
2018-02-27 11:04   ` [PATCH v3 6/9] add -p: Adjust offsets of subsequent hunks when one is skipped Phillip Wood
2018-02-27 11:04   ` [PATCH v3 7/9] add -p: calculate offset delta for edited patches Phillip Wood
2018-02-27 11:04   ` [PATCH v3 8/9] add -p: fix counting when splitting and coalescing Phillip Wood
2018-02-27 11:04   ` [PATCH v3 9/9] add -p: don't rely on apply's '--recount' option Phillip Wood
2018-03-01 10:50 ` [PATCH v4 0/9] Correct offsets of hunks when one is skipped Phillip Wood
2018-03-01 10:50   ` [PATCH v4 1/9] add -i: add function to format hunk header Phillip Wood
2018-03-01 10:50   ` [PATCH v4 2/9] t3701: indent here documents Phillip Wood
2018-03-01 10:50   ` [PATCH v4 3/9] t3701: use test_write_lines and write_script Phillip Wood
2018-03-01 10:50   ` [PATCH v4 4/9] t3701: don't hard code sha1 hash values Phillip Wood
2018-03-02 15:55     ` SZEDER Gábor
2018-03-02 16:09       ` Junio C Hamano
2018-03-05 10:59         ` Phillip Wood
2018-03-05 12:32           ` SZEDER Gábor
2018-03-01 10:50   ` [PATCH v4 5/9] t3701: add failing test for pathological context lines Phillip Wood
2018-03-01 10:51   ` [PATCH v4 6/9] add -p: adjust offsets of subsequent hunks when one is skipped Phillip Wood
2018-03-01 10:51   ` [PATCH v4 7/9] add -p: calculate offset delta for edited patches Phillip Wood
2018-03-01 20:14     ` Junio C Hamano
2018-03-02 10:36       ` Phillip Wood
2018-03-01 10:51   ` [PATCH v4 8/9] add -p: fix counting when splitting and coalescing Phillip Wood
2018-03-01 20:29     ` Junio C Hamano
2018-03-02 10:48       ` Phillip Wood
2018-03-01 10:51   ` [PATCH v4 9/9] add -p: don't rely on apply's '--recount' option Phillip Wood
2018-03-01 20:30     ` Junio C Hamano
2018-03-02 10:49       ` Phillip Wood
2018-03-05 10:56 ` [PATCH v5 0/9] Correct offsets of hunks when one is skipped Phillip Wood
2018-03-05 10:56   ` [PATCH v5 1/9] add -i: add function to format hunk header Phillip Wood
2018-03-05 10:56   ` [PATCH v5 2/9] t3701: indent here documents Phillip Wood
2018-03-05 10:56   ` [PATCH v5 3/9] t3701: use test_write_lines and write_script Phillip Wood
2018-03-05 10:56   ` [PATCH v5 4/9] t3701: don't hard code sha1 hash values Phillip Wood
2018-03-05 10:56   ` [PATCH v5 5/9] t3701: add failing test for pathological context lines Phillip Wood
2018-03-05 10:56   ` [PATCH v5 6/9] add -p: adjust offsets of subsequent hunks when one is skipped Phillip Wood
2018-03-05 10:56   ` [PATCH v5 7/9] add -p: calculate offset delta for edited patches Phillip Wood
2018-03-05 10:56   ` [PATCH v5 8/9] add -p: fix counting when splitting and coalescing Phillip Wood
2018-03-05 10:56   ` [PATCH v5 9/9] add -p: don't rely on apply's '--recount' option Phillip Wood
2018-03-05 18:50   ` [PATCH v5 0/9] Correct offsets of hunks when one is skipped Junio C Hamano
2018-03-06 10:25     ` Phillip Wood

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