#!/bin/sh

# The commit page. Most checks read the markup for the tree link, the parent
# link, the subject and the diffstat.

test_description='Check content on commit page'
. ./setup.sh

test_expect_success 'generate foo/commit' 'cgit_url "foo/commit" >tmp'
test_expect_success 'find tree link' 'grep "<a href=./foo/tree/.>" tmp'
test_expect_success 'find parent link' 'grep -E "<a href=./foo/commit/\?id=.+>" tmp'

test_expect_success 'find commit subject' '
	grep "<div class=.commit-subject.>commit 5<" tmp
'

test_expect_success 'find commit msg' 'grep "<div class=.commit-msg.></div>" tmp'
test_expect_success 'find diffstat' 'grep "<table class=.diffstat.>" tmp'

test_expect_success 'find diff summary' '
	grep "1 file changed, 1 insertion, 0 deletions" tmp
'

# A strict CSP refuses an inline style, so the bar takes its widths from SVG
# attributes, which also leave the page valid.
test_expect_success 'the diffstat bar is an SVG sized by its attributes' '
	grep "<td class=.graph.><svg viewBox=.0 0 1000 1. preserveAspectRatio=.none. aria-hidden=.true.><rect class=.add. width=.1000. height=.1./></svg></td>" tmp
'

test_expect_success 'a commit that changes no files draws no diffstat table' '
	(
		cd repos/foo &&
		git update-ref refs/heads/empty $(git commit-tree HEAD^{tree} -p HEAD -m empty)
	) &&
	cgit_url "foo/commit/&h=empty" >tmp &&
	grep "0 files changed, 0 insertions, 0 deletions" tmp &&
	! grep "<table class=.diffstat.>" tmp
'

# A root commit has no parent, so it diffs against the empty tree.
test_expect_success 'get root commit' '
	root=$(git -C repos/foo rev-list --max-parents=0 HEAD) &&
	cgit_url "foo/commit&id=$root" >tmp &&
	grep "</html>" tmp
'

test_expect_success 'root commit contains diffstat' '
	grep "<a href=./foo/diff/file-1.id=[0-9a-f]\{40,64\}.>file-1</a>" tmp
'

test_expect_success 'root commit contains diff' '
	grep ">diff --git a/file-1 b/file-1<" tmp &&
	grep "<div class=.add.>+1</div>" tmp
'

# A message that is not UTF-8, because its encoding header names something
# iconv cannot convert or is missing altogether, would otherwise reach a
# page declared UTF-8 as it is, so its stray bytes become question marks.
test_expect_success 'a message that is not UTF-8 has its stray bytes replaced' '
	(
		cd repos/foo &&
		tree=$(git rev-parse HEAD^{tree}) &&
		printf "tree %s\nauthor A U Thor <author@example.com> 1735689600 +0000\n" "$tree" >raw &&
		printf "committer A U Thor <author@example.com> 1735689600 +0000\n" >>raw &&
		printf "encoding no-such-charset\n\ncaf\351 subject\n\nbody \377 end\n" >>raw &&
		cid=$(git hash-object --literally -t commit -w raw) &&
		git update-ref refs/heads/latin "$cid"
	) &&
	cgit_url "foo/commit&h=latin" >tmp &&
	grep "<div class=.commit-subject.>caf? subject<" tmp &&
	grep "body ? end" tmp &&
	! grep "caf$(printf "\351")" tmp
'

test_expect_success 'an octopus merge, which draws no diff, offers no diff options' '
	(
		cd repos/foo &&
		cid=$(git commit-tree -p HEAD -p HEAD~1 -p HEAD~2 -m octopus HEAD^{tree}) &&
		git update-ref refs/heads/octopus "$cid"
	) &&
	cgit_url "foo/commit&h=octopus" >tmp &&
	! grep "cgit-panel" tmp &&
	cgit_url "foo/commit" >tmp &&
	grep "cgit-panel" tmp
'

test_done