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# frozen_string_literal: true
require "test_helper"
require "redis_client/hash_ring"
require "digest/sha1"
class RedisClient
class HashRingTest < RedisClientTestCase
include ClientTestHelper
setup do
@nodes = [
new_client(db: 1, id: "cache-1"),
new_client(db: 2, id: "cache-2"),
new_client(db: 3, id: "cache-3"),
]
@ring = RedisClient.ring(@nodes)
end
def test_node_for
assert_equal @nodes[2], @ring.node_for("foo")
assert_equal @nodes[0], @ring.node_for("bar")
assert_equal @nodes[1], @ring.node_for("baz")
assert_equal @nodes[0], @nodes[0].node_for("baz")
end
def test_custom_digest
@ring = RedisClient.ring(@nodes, digest: Digest::SHA1)
assert_equal @nodes[0], @ring.node_for("foo")
assert_equal @nodes[2], @ring.node_for("bar")
assert_equal @nodes[1], @ring.node_for("baz999")
end
def test_nodes_for
mapping = @ring.nodes_for("foo", "bar", "baz", "egg", "spam", "plop")
assert_equal 3, mapping.size
assert_equal ["baz", "spam", "plop"], mapping[@nodes[1]]
assert_equal ["bar", "egg"], mapping[@nodes[0]]
assert_equal ["foo"], mapping[@nodes[2]]
assert_equal mapping, @ring.nodes_for(["foo", "bar", "baz", "egg", "spam", "plop"])
assert_equal({ @nodes[0] => ["foo", "bar"] }, @nodes[0].nodes_for("foo", "bar"))
end
def test_nodes
assert_equal @nodes, @ring.nodes
assert_equal [@nodes[0]], @nodes[0].nodes
end
private
def new_client(**overrides)
RedisClient.config(**tcp_config.merge(overrides)).new_pool
end
end
end
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