t7610-mergetool: use test_cmp instead of test $(cat file) = $txt

diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 069e4e28e42d69e7b892112f3ba3743e4e13edac..840ad4d8accbfef59e2c9ade82105cc717f6866c 100755 (executable)
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -366,6 +366,26 @@ GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 
+corrupt_graph_setup() {
+       cd "$TRASH_DIRECTORY/full" &&
+       test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
+       cp $objdir/info/commit-graph commit-graph-backup
+}
+
+corrupt_graph_verify() {
+       grepstr=$1
+       test_must_fail git commit-graph verify 2>test_err &&
+       grep -v "^+" test_err >err &&
+       test_i18ngrep "$grepstr" err &&
+       if test "$2" != "no-copy"
+       then
+               cp $objdir/info/commit-graph commit-graph-pre-write-test
+       fi &&
+       git status --short &&
+       GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
+       git commit-graph verify
+}
+
 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 # Manipulates the commit-graph file at the position
 # by inserting the data, optionally zeroing the file
@@ -376,19 +396,28 @@ corrupt_graph_and_verify() {
        pos=$1
        data="${2:-\0}"
        grepstr=$3
-       cd "$TRASH_DIRECTORY/full" &&
+       corrupt_graph_setup &&
        orig_size=$(wc -c < $objdir/info/commit-graph) &&
        zero_pos=${4:-${orig_size}} &&
-       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 &&
        dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
        generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
-       test_must_fail git commit-graph verify 2>test_err &&
-       grep -v "^+" test_err >err &&
-       test_i18ngrep "$grepstr" err
+       corrupt_graph_verify "$grepstr"
+
 }
 
+test_expect_success POSIXPERM,SANITY 'detect permission problem' '
+       corrupt_graph_setup &&
+       chmod 000 $objdir/info/commit-graph &&
+       corrupt_graph_verify "Could not open" "no-copy"
+'
+
+test_expect_success 'detect too small' '
+       corrupt_graph_setup &&
+       echo "a small graph" >$objdir/info/commit-graph &&
+       corrupt_graph_verify "too small"
+'
+
 test_expect_success 'detect bad signature' '
        corrupt_graph_and_verify 0 "\0" \
                "graph signature"
@@ -499,6 +528,7 @@ test_expect_success 'git fsck (checks commit-graph)' '
        git fsck &&
        corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
                "incorrect checksum" &&
+       cp commit-graph-pre-write-test $objdir/info/commit-graph &&
        test_must_fail git fsck
 '