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#!/bin/sh

test_description='Validate cache'
. ./setup.sh

test_expect_success 'verify cache-size=0' '

	rm -f cache/* &&
	sed -e "s/cache-size=1021$/cache-size=0/" cgitrc >cgitrc.tmp &&
	mv -f cgitrc.tmp cgitrc &&
	cgit_url "" &&
	cgit_url "foo" &&
	cgit_url "foo/refs" &&
	cgit_url "foo/tree" &&
	cgit_url "foo/log" &&
	cgit_url "foo/diff" &&
	cgit_url "foo/patch" &&
	cgit_url "bar" &&
	cgit_url "bar/refs" &&
	cgit_url "bar/tree" &&
	cgit_url "bar/log" &&
	cgit_url "bar/diff" &&
	cgit_url "bar/patch" &&
	ls cache >output &&
	test_line_count = 0 output
'

test_expect_success 'verify cache-size=1' '

	rm -f cache/* &&
	sed -e "s/cache-size=0$/cache-size=1/" cgitrc >cgitrc.tmp &&
	mv -f cgitrc.tmp cgitrc &&
	cgit_url "" &&
	cgit_url "foo" &&
	cgit_url "foo/refs" &&
	cgit_url "foo/tree" &&
	cgit_url "foo/log" &&
	cgit_url "foo/diff" &&
	cgit_url "foo/patch" &&
	cgit_url "bar" &&
	cgit_url "bar/refs" &&
	cgit_url "bar/tree" &&
	cgit_url "bar/log" &&
	cgit_url "bar/diff" &&
	cgit_url "bar/patch" &&
	ls cache >output &&
	test_line_count = 1 output
'

test_expect_success 'verify cache-size=1021' '

	rm -f cache/* &&
	sed -e "s/cache-size=1$/cache-size=1021/" cgitrc >cgitrc.tmp &&
	mv -f cgitrc.tmp cgitrc &&
	cgit_url "" &&
	cgit_url "foo" &&
	cgit_url "foo/refs" &&
	cgit_url "foo/tree" &&
	cgit_url "foo/log" &&
	cgit_url "foo/diff" &&
	cgit_url "foo/patch" &&
	cgit_url "bar" &&
	cgit_url "bar/refs" &&
	cgit_url "bar/tree" &&
	cgit_url "bar/log" &&
	cgit_url "bar/diff" &&
	cgit_url "bar/patch" &&
	ls cache >output &&
	test_line_count = 13 output &&
	cgit_url "foo/ls_cache" >output.full &&
	strip_headers <output.full >output &&
	test_line_count = 13 output &&
	# Check that ls_cache output is cached correctly
	cgit_url "foo/ls_cache" >output.second &&
	test_cmp output.full output.second
'

# --- A cached page must hold everything the uncached one produced -----------
# Page output is buffered, so the slot is only complete if the buffer is
# emptied before the generated content is measured. The blob here is larger
# than one buffer, so a missing flush would truncate the cached copy.
test_expect_success 'set up a repo with a page larger than the output buffer' '
	mkrepo repos/bigpage 1 &&
	(
		cd repos/bigpage &&
		awk "BEGIN{for(i=0;i<20000;i++) print \"line \" i \" of the big file\"}" >big.txt &&
		git add big.txt &&
		git commit -m "add big.txt"
	) &&
	{
		echo "virtual-root=/" &&
		echo "cache-root=$PWD/cache2" &&
		echo "cache-size=64" &&
		echo "enable-tree-linenumbers=1" &&
		echo "repo.url=bigpage" &&
		echo "repo.path=$PWD/repos/bigpage/.git"
	} >bigrc &&
	rm -rf cache2 && mkdir cache2
'

bigq() { CGIT_CONFIG="$PWD/bigrc" QUERY_STRING="$1" cgit; }

test_expect_success 'the first request fills the slot and the second replays it' '
	bigq "url=bigpage/tree/big.txt" >big.first &&
	test $(wc -c <big.first) -gt 65536 &&
	bigq "url=bigpage/tree/big.txt" >big.second &&
	strip_headers <big.first >big.first.body &&
	strip_headers <big.second >big.second.body &&
	test_cmp big.first.body big.second.body
'

test_expect_success 'the cached body matches one generated with the cache off' '
	sed -e "s/^cache-size=64$/cache-size=0/" bigrc >bignocache &&
	CGIT_CONFIG="$PWD/bignocache" QUERY_STRING="url=bigpage/tree/big.txt" cgit >big.nocache &&
	strip_headers <big.nocache >big.nocache.body &&
	# The footer carries the time the page was generated, which differs
	# between the two runs by construction.
	sed -e "s/generated by .*//" big.nocache.body >big.a &&
	sed -e "s/generated by .*//" big.second.body >big.b &&
	test_cmp big.a big.b
'

test_expect_success 'the page ends where it should, so nothing was dropped' '
	tail -c 200 big.second.body | grep "</html>"
'

test_done