[PATCH v4 07/21] commit-graph: verify catches corrupt signature
- Date: Mon, 4 Jun 2018 16:52:28 +0000
- From: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
- Subject: [PATCH v4 07/21] commit-graph: verify catches corrupt signature
This is the first of several commits that add a test to check that
'git commit-graph verify' catches corruption in the commit-graph
file. The first test checks that the command catches an error in
the file signature. This is a check that exists in the existing
commit-graph reading code.
Add a helper method 'corrupt_graph_and_verify' to the test script
t5318-commit-graph.sh. This helper corrupts the commit-graph file
at a certain location, runs 'git commit-graph verify', and reports
the output to the 'err' file. This data is filtered to remove the
lines added by 'test_must_fail' when the test is run verbosely.
Then, the output is checked to contain a specific error message.
Most messages from 'git commit-graph verify' will not be marked
for translation. There will be one exception: the message that
reports an invalid checksum will be marked for translation, as that
is the only message that is intended for a typical user.
Helped-by: Szeder Gábor <szeder.dev@xxxxxxxxx>
Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
t/t5318-commit-graph.sh | 43 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 0830ef9fdd..c0c1ff09b9 100755
@@ -235,9 +235,52 @@ test_expect_success 'perform fast-forward merge in full repo' '
test_cmp expect output
+# the verify tests below expect the commit-graph to contain
+# exactly the commits reachable from the commits/8 branch.
+# If the file changes the set of commits in the list, then the
+# offsets into the binary file will result in different edits
+# and the tests will likely break.
test_expect_success 'git commit-graph verify' '
cd "$TRASH_DIRECTORY/full" &&
+ git rev-parse commits/8 | git commit-graph write --stdin-commits &&
git commit-graph verify >output
+# usage: corrupt_graph_and_verify <position> <data> <string>
+# Manipulates the commit-graph file at the position
+# by inserting the data, then runs 'git commit-graph verify'
+# and places the output in the file 'err'. Test 'err' for
+# the given string.
+ cd "$TRASH_DIRECTORY/full" &&
+ test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
+ cp $objdir/info/commit-graph commit-graph-backup &&
+ printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
+ test_must_fail git commit-graph verify 2>test_err &&
+ grep -v "^+" test_err >err
+ test_i18ngrep "$grepstr" err
+test_expect_success 'detect bad signature' '
+ corrupt_graph_and_verify 0 "\0" \
+ "graph signature"
+test_expect_success 'detect bad version' '
+ corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
+ "graph version"
+test_expect_success 'detect bad hash version' '
+ corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
+ "hash version"