#!/bin/sh

# The rawdiff page serves a diff as plain text fit for patch. Every test
# runs the git command the page mirrors and compares the two byte for byte,
# over an ordinary commit, the parentless initial commit, a range, a path and
# a rename.

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

test_expect_success 'a commit is served as text matching git diff' '
	cgit_ok_url "foo/rawdiff" >tmp &&
	sed "/^$/q" tmp | grep "^Content-Type: text/plain" &&
	git -C repos/foo diff HEAD^.. >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual
'

test_expect_success 'the initial commit matches git diff-tree' '
	root=$(git -C repos/foo rev-list --max-parents=0 HEAD) &&
	cgit_ok_url "foo/rawdiff&id=$root" >tmp &&
	git -C repos/foo diff-tree -p --no-commit-id --root "$root" >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual
'

test_expect_success 'a range matches git diff over the same range' '
	id=$(git -C repos/foo rev-parse HEAD) &&
	id2=$(git -C repos/foo rev-parse HEAD~3) &&
	cgit_ok_url "foo/rawdiff&id=$id&id2=$id2" >tmp &&
	git -C repos/foo diff HEAD~3..HEAD >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual
'

# The grep keeps an empty expect, which an empty page would match, from
# passing.
test_expect_success 'a path limits the diff to that file' '
	id=$(git -C repos/foo rev-parse HEAD) &&
	id2=$(git -C repos/foo rev-parse HEAD~3) &&
	cgit_ok_url "foo/rawdiff/file-4&id=$id&id2=$id2" >tmp &&
	git -C repos/foo diff HEAD~3..HEAD -- file-4 >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual &&
	grep "file-4" actual
'

# The old name of a file renamed in the change joins the limit, so the diff
# shows the rename, the same as git diff given both names. The rename adds a
# line too, so git has to pair the files by similarity rather than as an
# exact match, and the last grep makes sure the line is there.
test_expect_success 'a renamed file is diffed as the rename' '
	mkrepo_renamed repos/moved "echo eleven >>new.txt" &&
	cgitrc_repo movedrc moved &&
	cgit_ok movedrc "url=moved/rawdiff/new.txt" >tmp &&
	git -C repos/moved diff HEAD^ HEAD -- old.txt new.txt >expect &&
	strip_headers <tmp >actual &&
	test_cmp expect actual &&
	grep "^rename from old.txt$" actual &&
	grep "^+eleven$" actual
'

test_done