datomic_test.clj

(deftest rested-removed-data-should-reflect-in-db
  (with-test-db simple-schema
    (let [scm-a (scm {:val1 "name" :val2 123124})
          scm-b (scm {:val1 "name"})]
      @(db/transact *conn* [(sp->nested-map-for-transaction (db) scm-a)])
      @(db/transact *conn* [(sp->nested-map-for-transaction (db) scm-b)])
      (let [eid (ffirst (db/q '[:find ?eid :where [?eid :scm/val1 "name"]] (db)))
            entity (db/entity (db) eid)]
        (is (nil? (:scm/val2 entity)))))))