mirror of
https://github.com/basecamp/once-campfire.git
synced 2026-10-09 00:00:12 +09:00
GPT on behalf of DHH
89 lines
3.1 KiB
Ruby
89 lines
3.1 KiB
Ruby
require "test_helper"
|
|
require "tmpdir"
|
|
|
|
class ResponseCacheTest < ActiveSupport::TestCase
|
|
setup do
|
|
@directory = Dir.mktmpdir
|
|
@database = File.join(@directory, "cache.sqlite3")
|
|
SQLite3::Database.new(@database) do |database|
|
|
database.execute("PRAGMA journal_mode=WAL")
|
|
database.execute("CREATE TABLE values_for_test (value TEXT)")
|
|
end
|
|
ActiveRecord::Base.stubs(:connection_db_config).returns(Struct.new(:database).new(@database))
|
|
@cache = ResponseCache.new
|
|
@cache.stubs(:budget).returns(1024)
|
|
end
|
|
|
|
teardown do
|
|
@cache.clear
|
|
FileUtils.remove_entry(@directory)
|
|
end
|
|
|
|
test "foreign commits expire entries and reject old render admission" do
|
|
version = @cache.version
|
|
@cache.write("page", version, entry("first"))
|
|
assert_equal "first", @cache.read("page", version)[:body]
|
|
SQLite3::Database.new(@database) { |database| database.execute("INSERT INTO values_for_test VALUES ('committed')") }
|
|
assert_nil @cache.read("page", version)
|
|
@cache.write("page", version, entry("old in-flight render"))
|
|
assert_nil @cache.read("page", @cache.version)
|
|
@cache.write("page", @cache.version, entry("fresh"))
|
|
assert_equal "fresh", @cache.read("page", @cache.version)[:body]
|
|
end
|
|
|
|
test "byte budget evicts oldest and bypasses oversized entries and keys" do
|
|
version = @cache.version
|
|
@cache.stubs(:budget).returns(512)
|
|
@cache.write("first", version, entry("a" * 100))
|
|
@cache.write("second", version, entry("b" * 100))
|
|
assert_nil @cache.read("first", version)
|
|
assert_equal "b" * 100, @cache.read("second", version)[:body]
|
|
@cache.write("oversized", version, entry("c" * 1000))
|
|
assert_nil @cache.read("oversized", version)
|
|
@cache.write("k" * 2049, version, entry("small"))
|
|
assert_nil @cache.read("k" * 2049, version)
|
|
end
|
|
|
|
test "clearing the observer gives later pages a distinct namespace" do
|
|
version = @cache.version
|
|
@cache.clear
|
|
assert_not_equal version, @cache.version
|
|
end
|
|
|
|
test "cold renders coalesce without holding the observer mutex" do
|
|
version = @cache.version
|
|
entered = Queue.new
|
|
release = Queue.new
|
|
first = Thread.new do
|
|
@cache.synchronize_render("page", version) do
|
|
entered << true
|
|
release.pop
|
|
@cache.write("page", version, entry("completed render"))
|
|
end
|
|
end
|
|
entered.pop
|
|
second_started = Queue.new
|
|
second = Thread.new do
|
|
second_started << true
|
|
@cache.synchronize_render("page", version) { @cache.read("page", version) }
|
|
end
|
|
second_started.pop
|
|
deadline = Process.clock_gettime(Process::CLOCK_MONOTONIC) + 2
|
|
Thread.pass until second.status == "sleep" || Process.clock_gettime(Process::CLOCK_MONOTONIC) >= deadline
|
|
assert_equal "sleep", second.status
|
|
assert_nil @cache.read("page", version)
|
|
assert_equal version, @cache.version
|
|
release << true
|
|
first.value
|
|
assert_equal "completed render", second.value[:body]
|
|
ensure
|
|
release << true if release
|
|
[ first, second ].compact.each { |thread| thread.join(2) }
|
|
end
|
|
|
|
private
|
|
def entry(body)
|
|
{ body: body, marker: "unexposed-marker", headers: {} }
|
|
end
|
|
end
|