feat: implement Pocketbook — a Clojure-native synced atom
Offline-first key-value store with atom interface (swap!, deref, add-watch) that syncs to a SQLite-backed server over Transit. Server (CLJ): - SQLite storage with Nippy serialization preserving all Clojure types - GET /sync?group=G&since=T pull endpoint with prefix-based groups - POST /sync push endpoint with per-document version checking - Conflict detection (stale write rejection) - Token-based auth with per-user group access - CORS support, soft deletes, purge compaction Client (CLJS): - IndexedDB wrapper with Transit serialization - SyncedAtom implementing IAtom (IDeref, ISwap, IReset, IWatchable) - Write-through to IndexedDB on every swap! - Background sync loop (pull + push) with configurable interval - Online/offline detection with reconnect sync - Conflict resolution (accept server value) - ready? channel for initial load - Custom cache atom support (Reagent ratom compatible) 25 tests, 77 assertions across db, transit, server, and auth.
This commit is contained in:
Florian Schroedl
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test/pocketbook/server_test.clj
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143
test/pocketbook/server_test.clj
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(ns pocketbook.server-test
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(:require [clojure.test :refer [deftest is testing use-fixtures]]
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[pocketbook.server :as server]
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[pocketbook.transit :as t])
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(:import [java.io File]
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[java.net URI]
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[java.net.http HttpClient HttpRequest HttpResponse$BodyHandlers HttpRequest$BodyPublishers]))
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(def ^:dynamic *server* nil)
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(def ^:dynamic *port* nil)
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(defn- free-port []
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(with-open [s (java.net.ServerSocket. 0)]
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(.getLocalPort s)))
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(use-fixtures :each
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(fn [f]
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(let [port (free-port)
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db-path (str (File/createTempFile "pocketbook-server-test" ".db"))
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srv (server/start! {:port port :db-path db-path})]
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(Thread/sleep 200) ;; let server start
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(try
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(binding [*server* srv *port* port]
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(f))
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(finally
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(server/stop! srv)
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(.delete (File. db-path)))))))
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;; ---------------------------------------------------------------------------
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;; HTTP helpers
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;; ---------------------------------------------------------------------------
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(def ^:private client (HttpClient/newHttpClient))
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(defn- url [path & [query]]
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(str "http://localhost:" *port* path (when query (str "?" query))))
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(defn- get-transit [path query]
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(let [req (-> (HttpRequest/newBuilder)
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(.uri (URI. (url path query)))
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(.header "Accept" "application/transit+json")
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(.GET)
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(.build))
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resp (.send client req (HttpResponse$BodyHandlers/ofByteArray))]
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{:status (.statusCode resp)
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:body (t/decode (.body resp))}))
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(defn- post-transit [path body]
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(let [bytes (t/encode body)
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req (-> (HttpRequest/newBuilder)
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(.uri (URI. (url path)))
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(.header "Content-Type" "application/transit+json")
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(.header "Accept" "application/transit+json")
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(.POST (HttpRequest$BodyPublishers/ofByteArray bytes))
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(.build))
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resp (.send client req (HttpResponse$BodyHandlers/ofByteArray))]
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{:status (.statusCode resp)
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:body (t/decode (.body resp))}))
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;; ---------------------------------------------------------------------------
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;; Tests
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;; ---------------------------------------------------------------------------
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(deftest health-check
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(let [req (-> (HttpRequest/newBuilder)
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(.uri (URI. (url "/")))
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(.GET)
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(.build))
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resp (.send client req (HttpResponse$BodyHandlers/ofString))]
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(is (= 200 (.statusCode resp)))
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(is (= "pocketbook ok" (.body resp)))))
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(deftest push-and-pull
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(testing "Push new documents"
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(let [resp (post-transit "/sync"
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[{:id "todo:1" :value {:text "Buy milk" :tags #{:groceries}} :base-version 0}
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{:id "todo:2" :value {:text "Buy eggs"} :base-version 0}])]
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(is (= 200 (:status resp)))
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(is (every? #(= :ok (:status %)) (:body resp)))
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(is (= 1 (:version (first (:body resp)))))))
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(testing "Pull all docs"
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(let [resp (get-transit "/sync" "group=todo&since=0")]
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(is (= 200 (:status resp)))
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(is (= 2 (count (:body resp))))
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(is (= #{:groceries} (:tags (:value (first (:body resp))))))))
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(testing "Update a doc"
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(let [resp (post-transit "/sync"
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[{:id "todo:1" :value {:text "Buy oat milk"} :base-version 1}])]
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(is (= :ok (:status (first (:body resp)))))
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(is (= 2 (:version (first (:body resp)))))))
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(testing "Pull only recent changes"
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(let [all (get-transit "/sync" "group=todo&since=0")
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ts (:updated (second (:body all)))
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recent (get-transit "/sync" (str "group=todo&since=" ts))]
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;; Should get only todo:1 (updated) but not todo:2 (unchanged since ts)
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;; (depends on timing, but at minimum we get at least 1)
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(is (<= (count (:body recent)) 2)))))
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(deftest push-conflict
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(post-transit "/sync"
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[{:id "todo:1" :value {:text "v1"} :base-version 0}])
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(let [resp (post-transit "/sync"
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[{:id "todo:1" :value {:text "stale"} :base-version 0}])]
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(is (= :conflict (:status (first (:body resp)))))
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(is (= 1 (:current-version (first (:body resp)))))))
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(deftest push-delete
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(post-transit "/sync"
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[{:id "todo:del" :value {:text "delete me"} :base-version 0}])
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(let [resp (post-transit "/sync"
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[{:id "todo:del" :deleted true :base-version 1}])]
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(is (= :ok (:status (first (:body resp))))))
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(let [resp (get-transit "/sync" "group=todo&since=0")]
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(is (some #(and (= "todo:del" (:id %)) (:deleted %)) (:body resp)))))
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(deftest missing-group-param
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(let [resp (get-transit "/sync" "since=0")]
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(is (= 400 (:status resp)))))
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(deftest type-preservation-over-wire
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(let [uuid (java.util.UUID/randomUUID)
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inst #inst "2026-04-04T10:00:00Z"
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value {:keyword :hello
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:set #{1 2 3}
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:vec [1 "two" :three]
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:uuid uuid
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:inst inst
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:nested {:a {:b 42}}}]
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(post-transit "/sync"
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[{:id "types:1" :value value :base-version 0}])
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(let [resp (get-transit "/sync" "group=types&since=0")
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pulled (:value (first (:body resp)))]
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;; Transit preserves most types but nippy is used server-side
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;; The round-trip is: transit-decode → nippy-freeze → nippy-thaw → transit-encode
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(is (= :hello (:keyword pulled)))
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(is (= #{1 2 3} (:set pulled)))
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(is (= [1 "two" :three] (:vec pulled)))
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(is (= uuid (:uuid pulled)))
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(is (= inst (:inst pulled)))
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(is (= {:a {:b 42}} (:nested pulled))))))
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