diff mbox series

[1/5] t/lib-commit-graph.sh: allow `graph_read_expect()` in sub-directories

Message ID 084822126301c0e723155fd76942f2e259b77158.1689960606.git.me@ttaylorr.com (mailing list archive)
State Superseded
Headers show
Series commit-graph: test cleanup and modernization | expand

Commit Message

Taylor Blau July 21, 2023, 5:30 p.m. UTC
The `graph_read_expect()` function is used to ensure that the output of
the "read-graph" test helper matches certain parameters (e.g., how many
commits are in the graph, which chunks were written, etc.).

It expects the Git repository being tested to be at the current working
directory. However, a handful of t5318 tests use different repositories
stored in sub-directories. To work around this, several tests in t5318
change into the relevant repository outside of a sub-shell, altering the
context for the rest of the suite.

Prepare to remove these globally-scoped directory changes by teaching
`graph_read_expect()` to take an optional "-C dir" to specify where the
repository containing the commit-graph being tested is.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 t/lib-commit-graph.sh | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Comments

Eric Sunshine July 21, 2023, 5:41 p.m. UTC | #1
On Fri, Jul 21, 2023 at 1:31 PM Taylor Blau <me@ttaylorr.com> wrote:
> The `graph_read_expect()` function is used to ensure that the output of
> the "read-graph" test helper matches certain parameters (e.g., how many
> commits are in the graph, which chunks were written, etc.).
>
> It expects the Git repository being tested to be at the current working
> directory. However, a handful of t5318 tests use different repositories
> stored in sub-directories. To work around this, several tests in t5318
> change into the relevant repository outside of a sub-shell, altering the
> context for the rest of the suite.
>
> Prepare to remove these globally-scoped directory changes by teaching
> `graph_read_expect()` to take an optional "-C dir" to specify where the
> repository containing the commit-graph being tested is.
>
> Signed-off-by: Taylor Blau <me@ttaylorr.com>
> ---
> diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
> @@ -32,6 +32,13 @@ graph_git_behavior() {
>  graph_read_expect() {
> +       DIR="."
> +       if test "$1" = -C
> +       then
> +               shift
> +               DIR="$1"
> +               shift
> +       fi
> @@ -47,12 +54,15 @@ graph_read_expect() {
> -       cat >expect <<- EOF
> +       cat >$DIR/expect <<- EOF

It may not matter for any of the current callers, but we'd normally
want to quote the expansion of $DIR. Also, as I recall, some versions
of bash complain if the target of '>' is not quoted. So:

    cat >"$DIR/expect" <<-EOF

>         header: 43475048 1 $(test_oid oid_version) $NUM_CHUNKS 0
>         num_commits: $1
>         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
>         options:$OPTIONS
>         EOF
> -       test-tool read-graph >output &&
> -       test_cmp expect output
> +       (
> +               cd "$DIR" &&
> +               test-tool read-graph >output &&
> +               test_cmp expect output
> +       )
>  }
Taylor Blau July 21, 2023, 6:33 p.m. UTC | #2
On Fri, Jul 21, 2023 at 01:41:06PM -0400, Eric Sunshine wrote:
> > diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
> > @@ -32,6 +32,13 @@ graph_git_behavior() {
> >  graph_read_expect() {
> > +       DIR="."
> > +       if test "$1" = -C
> > +       then
> > +               shift
> > +               DIR="$1"
> > +               shift
> > +       fi
> > @@ -47,12 +54,15 @@ graph_read_expect() {
> > -       cat >expect <<- EOF
> > +       cat >$DIR/expect <<- EOF
>
> It may not matter for any of the current callers, but we'd normally
> want to quote the expansion of $DIR. Also, as I recall, some versions
> of bash complain if the target of '>' is not quoted. So:
>
>     cat >"$DIR/expect" <<-EOF

Hmm. I'm certainly happy to make this change, but there are many other
spots within our tests that would need similar updates. Looking through
the output of:

    $ git grep -E '>\$[[:alnum:]_]+/.*' -- t/**/*.sh

I see 25 such instances (including this one) that would need similar
treatment.

Thanks,
Taylor
Junio C Hamano July 21, 2023, 6:54 p.m. UTC | #3
Taylor Blau <me@ttaylorr.com> writes:

> On Fri, Jul 21, 2023 at 01:41:06PM -0400, Eric Sunshine wrote:
>> > diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
>> > @@ -32,6 +32,13 @@ graph_git_behavior() {
>> >  graph_read_expect() {
>> > +       DIR="."
>> > +       if test "$1" = -C
>> > +       then
>> > +               shift
>> > +               DIR="$1"
>> > +               shift
>> > +       fi
>> > @@ -47,12 +54,15 @@ graph_read_expect() {
>> > -       cat >expect <<- EOF
>> > +       cat >$DIR/expect <<- EOF
>>
>> It may not matter for any of the current callers, but we'd normally
>> want to quote the expansion of $DIR. Also, as I recall, some versions
>> of bash complain if the target of '>' is not quoted. So:
>>
>>     cat >"$DIR/expect" <<-EOF

Correct.  

Documentation/CodingGuidelines spells out this shell redirection
rule and it applies not just to tests but our scripted porcelains
(if any remains, that is).

> Hmm. I'm certainly happy to make this change, but there are many other
> spots within our tests that would need similar updates. Looking through
> the output of:
>
>     $ git grep -E '>\$[[:alnum:]_]+/.*' -- t/**/*.sh
>
> I see 25 such instances (including this one) that would need similar
> treatment.

Let's not make things worse.

Thanks.
diff mbox series

Patch

diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
index 5d79e1a4e96..c50553df0ed 100755
--- a/t/lib-commit-graph.sh
+++ b/t/lib-commit-graph.sh
@@ -32,6 +32,13 @@  graph_git_behavior() {
 graph_read_expect() {
 	OPTIONAL=""
 	NUM_CHUNKS=3
+	DIR="."
+	if test "$1" = -C
+	then
+		shift
+		DIR="$1"
+		shift
+	fi
 	if test -n "$2"
 	then
 		OPTIONAL=" $2"
@@ -47,12 +54,15 @@  graph_read_expect() {
 	then
 		OPTIONS=" read_generation_data"
 	fi
-	cat >expect <<- EOF
+	cat >$DIR/expect <<- EOF
 	header: 43475048 1 $(test_oid oid_version) $NUM_CHUNKS 0
 	num_commits: $1
 	chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
 	options:$OPTIONS
 	EOF
-	test-tool read-graph >output &&
-	test_cmp expect output
+	(
+		cd "$DIR" &&
+		test-tool read-graph >output &&
+		test_cmp expect output
+	)
 }