1 files changed, 67 insertions, 0 deletions
diff --git a/tests/config/cache.test.lua b/tests/config/cache.test.lua
new file mode 100644
index 0000000..33b87db
--- /dev/null
+++ b/tests/config/cache.test.lua
@@ -0,0 +1,67 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+-- test if cache module properties work
+local function test_properties()
+	is(type(cache), 'table', 'cache module is loaded')
+	is(cache.count(), 0, 'cache is empty on startup')
+	local backends = cache.backends()
+	is(type(backends), 'table', 'cache provides a list of backends')
+	ok(backends['lmdb'], 'cache provides built-in lmdb backend')
+	is(cache.current_storage, 'lmdb://', 'cache starts with lmdb backend')
+	is(cache.current_size, 100 * MB, 'cache starts with default size limit')
+	is(cache.max_ttl(10), 10, 'allows setting maximum TTL')
+	is(cache.max_ttl(), 10, 'stored maximum TTL')
+	is(cache.min_ttl(1), 1, 'allows setting minimum TTL')
+	is(cache.min_ttl(), 1, 'stored minimum TTL')
+end
+
+-- test if the stats work with reopening the cache and operations fail with closed cache
+local function test_stats()
+	ok(cache.close(), 'cache can be closed')
+	boom(cache.open, {100 * MB, 'invalid://'}, 'cache cannot be opened with invalid backend')
+
+	boom(cache.clear, {}, '.clear() does not work on closed cache')
+	boom(cache.count, {}, '.count() does not work on closed cache')
+	boom(cache.get, { 'key' }, '.get(...) does not work on closed cache')
+
+	ok(cache.open(100 * MB), 'cache can be reopened')
+	local s = cache.stats()
+	is(type(s), 'table', 'stats returns a table')
+	-- Just checking the most useful fields
+	isnt(s.read and s.read_miss and s.write, nil, 'stats returns correct fields')
+end
+
+-- test if cache can be resized or shrunk
+local function test_resize()
+	ok(cache.open(200 * MB, 'lmdb://'), 'cache can be resized')
+	is(cache.current_size, 200 * MB, 'cache was resized')
+	ok(cache.open(50 * MB), 'cache can be shrunk')
+	is(cache.current_size, 50 * MB, 'cache was shrunk')
+end
+
+-- test access to cache through context
+local function test_context_cache()
+	local c = kres.context().cache
+	is(type(c), 'cdata', 'context has a cache object')
+	local s = c.stats
+	isnt(s.read and s.read_miss and s.write, 'context cache stats works')
+	-- insert A record into cache
+	local rdata = '\1\2\3\4'
+	local rr = kres.rrset('\3com\0', kres.type.A, kres.class.IN, 66)
+	rr:add_rdata(rdata, #rdata)
+	local s_write = s.write
+	ok(c:insert(rr, nil, 0, 0), 'cache insertion works (A)')
+	ok(c:commit(), 'cache commit works')
+	isnt(s.write, s_write, 'cache insertion increments counters')
+	-- insert NS record into cache
+	local rr_ns = kres.rrset('\3com\0', kres.type.NS, kres.class.IN, 66)
+	local rdata_ns = todname('c.gtld-servers.net')
+	ok(rr_ns:add_rdata(rdata_ns, #rdata_ns), 'adding rdata works')
+	ok(c:insert(rr_ns, nil, 0), 'cache insertion works (NS)')
+end
+
+return {
+	test_properties,
+	test_stats,
+	test_resize,
+	test_context_cache,
+}