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import pytest
import pytest_asyncio
from redis import exceptions
from tests.conftest import skip_if_server_version_lt
multiply_script = """
local value = redis.call('GET', KEYS[1])
value = tonumber(value)
return value * ARGV[1]"""
msgpack_hello_script = """
local message = cmsgpack.unpack(ARGV[1])
local name = message['name']
return "hello " .. name
"""
msgpack_hello_script_broken = """
local message = cmsgpack.unpack(ARGV[1])
local names = message['name']
return "hello " .. name
"""
@pytest.mark.onlynoncluster
class TestScripting:
@pytest_asyncio.fixture
async def r(self, create_redis):
redis = await create_redis()
yield redis
await redis.script_flush()
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_eval(self, r):
await r.flushdb()
await r.set("a", 2)
# 2 * 3 == 6
assert await r.eval(multiply_script, 1, "a", 3) == 6
@pytest.mark.asyncio(forbid_global_loop=True)
@skip_if_server_version_lt("6.2.0")
async def test_script_flush(self, r):
await r.set("a", 2)
await r.script_load(multiply_script)
await r.script_flush("ASYNC")
await r.set("a", 2)
await r.script_load(multiply_script)
await r.script_flush("SYNC")
await r.set("a", 2)
await r.script_load(multiply_script)
await r.script_flush()
with pytest.raises(exceptions.DataError):
await r.set("a", 2)
await r.script_load(multiply_script)
await r.script_flush("NOTREAL")
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_evalsha(self, r):
await r.set("a", 2)
sha = await r.script_load(multiply_script)
# 2 * 3 == 6
assert await r.evalsha(sha, 1, "a", 3) == 6
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_evalsha_script_not_loaded(self, r):
await r.set("a", 2)
sha = await r.script_load(multiply_script)
# remove the script from Redis's cache
await r.script_flush()
with pytest.raises(exceptions.NoScriptError):
await r.evalsha(sha, 1, "a", 3)
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_script_loading(self, r):
# get the sha, then clear the cache
sha = await r.script_load(multiply_script)
await r.script_flush()
assert await r.script_exists(sha) == [False]
await r.script_load(multiply_script)
assert await r.script_exists(sha) == [True]
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_script_object(self, r):
await r.script_flush()
await r.set("a", 2)
multiply = r.register_script(multiply_script)
precalculated_sha = multiply.sha
assert precalculated_sha
assert await r.script_exists(multiply.sha) == [False]
# Test second evalsha block (after NoScriptError)
assert await multiply(keys=["a"], args=[3]) == 6
# At this point, the script should be loaded
assert await r.script_exists(multiply.sha) == [True]
# Test that the precalculated sha matches the one from redis
assert multiply.sha == precalculated_sha
# Test first evalsha block
assert await multiply(keys=["a"], args=[3]) == 6
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_script_object_in_pipeline(self, r):
await r.script_flush()
multiply = r.register_script(multiply_script)
precalculated_sha = multiply.sha
assert precalculated_sha
pipe = r.pipeline()
pipe.set("a", 2)
pipe.get("a")
await multiply(keys=["a"], args=[3], client=pipe)
assert await r.script_exists(multiply.sha) == [False]
# [SET worked, GET 'a', result of multiple script]
assert await pipe.execute() == [True, b"2", 6]
# The script should have been loaded by pipe.execute()
assert await r.script_exists(multiply.sha) == [True]
# The precalculated sha should have been the correct one
assert multiply.sha == precalculated_sha
# purge the script from redis's cache and re-run the pipeline
# the multiply script should be reloaded by pipe.execute()
await r.script_flush()
pipe = r.pipeline()
pipe.set("a", 2)
pipe.get("a")
await multiply(keys=["a"], args=[3], client=pipe)
assert await r.script_exists(multiply.sha) == [False]
# [SET worked, GET 'a', result of multiple script]
assert await pipe.execute() == [True, b"2", 6]
assert await r.script_exists(multiply.sha) == [True]
@pytest.mark.asyncio(forbid_global_loop=True)
async def test_eval_msgpack_pipeline_error_in_lua(self, r):
msgpack_hello = r.register_script(msgpack_hello_script)
assert msgpack_hello.sha
pipe = r.pipeline()
# avoiding a dependency to msgpack, this is the output of
# msgpack.dumps({"name": "joe"})
msgpack_message_1 = b"\x81\xa4name\xa3Joe"
await msgpack_hello(args=[msgpack_message_1], client=pipe)
assert await r.script_exists(msgpack_hello.sha) == [False]
assert (await pipe.execute())[0] == b"hello Joe"
assert await r.script_exists(msgpack_hello.sha) == [True]
msgpack_hello_broken = r.register_script(msgpack_hello_script_broken)
await msgpack_hello_broken(args=[msgpack_message_1], client=pipe)
with pytest.raises(exceptions.ResponseError) as excinfo:
await pipe.execute()
assert excinfo.type == exceptions.ResponseError
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