From 8cbaaf4ca8d62331f5eb45e69dc5d35fbcafe89d Mon Sep 17 00:00:00 2001
From: victorbjelkholm <victorbjelkholm@gmail.com>
Date: Wed, 24 Apr 2019 19:47:04 +0200
Subject: [PATCH] Outline for property testing

License: MIT
Signed-off-by: Victor Bjelkholm <git@victor.earth>
---
 project.clj                   |   3 +-
 test/ipfs_api/files_check.clj | 171 ++++++++++++++++++++++++++++++++++
 2 files changed, 173 insertions(+), 1 deletion(-)
 create mode 100644 test/ipfs_api/files_check.clj

diff --git a/project.clj b/project.clj
index f85dce9..b71eed1 100644
--- a/project.clj
+++ b/project.clj
@@ -6,5 +6,6 @@
   :plugins [[jonase/eastwood "0.3.5"]]
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [clj-http "3.9.1"]
-                 [cheshire "5.8.1"]]
+                 [cheshire "5.8.1"]
+                 [org.clojure/test.check "0.10.0-alpha4"]]
   :repl-options {:init-ns ipfs-api.core})
diff --git a/test/ipfs_api/files_check.clj b/test/ipfs_api/files_check.clj
new file mode 100644
index 0000000..b507955
--- /dev/null
+++ b/test/ipfs_api/files_check.clj
@@ -0,0 +1,171 @@
+(ns ipfs-api.files-check
+  (:require
+            [clojure.test.check :as tc]
+            [clojure.test.check.generators :as gen]
+            [clojure.test.check.properties :as prop]
+            [clojure.test.check.clojure-test :refer [defspec]]))
+
+
+;; ipfs mfs api
+;; chcid [<path>]
+;; cp <source> <dest>
+;; flush [<path>]
+;; ls [<path>]
+;; mkdir <path>
+;; mv <source> <dest>
+;; read <path>
+;; rm <path>
+;; stat <path>
+;; write <path> <data>
+
+;; not exposed
+;; flush
+;; chcid
+
+;; additional exposed api
+;; exists?
+;; clear! => removes "/"
+
+(defn rand-bool [] (> 0.5 (rand)))
+(comment
+  (rand-bool))
+
+(defn s-prefix [a] (str "/" a))
+
+(defn str-add-rand [to-add s]
+  (clojure.string/join "" (assoc (clojure.string/split s #"") (+ (int (rand (count s))) 1) to-add)))
+
+(defn maybe-do [s f]
+  (if (rand-bool) (f s) s))
+
+(defn random-path [a] (s-prefix (maybe-do a (partial str-add-rand "/"))))
+
+(defn valid-path [a] (let [s (set a)]
+                       (if (= (count s) 1)
+                         false
+                         (not (= (last (clojure.string/split a #"")) "/")))))
+
+(def gen-path (gen/such-that valid-path
+                             (gen/fmap random-path
+                                       gen/string-alphanumeric)))
+
+(def gen-content gen/string)
+(def gen-write (gen/return [:write gen-path gen-content]))
+
+;; (deftest files-contains
+
+(comment
+  (clojure.pprint/pprint (gen/sample gen-path 100))
+  (clojure.pprint/pprint (gen/sample gen-content 100))
+  )
+
+(defn db-create [] (atom {}))
+(defn db-write [db path content] (swap! db assoc path content))
+(defn db-read [db path] (get @db path))
+(defn db-clear [db] (reset! db {}))
+(defn db-delete [db path] (swap! db dissoc path))
+(defn db-size [db] (count @db))
+
+(comment
+  (db-read (db-write (db-create) "/hello" "world") "/hello")
+  (let [p "/hello"
+        c "das"
+        db (db-create)]
+    (db-write db p c)
+    (= (db-read db p) c))
+  )
+
+(defspec mfs-contains 1000
+  (prop/for-all [p gen-path
+                 c gen-content]
+                (let [db (db-create)]
+                  (db-write db p c)
+                  (= c (db-read db p)))))
+
+(defspec mfs-overwrite 1000
+  (prop/for-all [p gen-path
+                 c gen-content
+                 c2 gen-content]
+                (let [db (db-create)]
+                  (db-write db p c)
+                  (db-write db p c2)
+                  (= c2 (db-read db p)))))
+
+(defspec mfs-clear 1000
+  (prop/for-all [p gen-path
+                 c gen-content]
+                (let [db (db-create)]
+                  (db-write db p c)
+                  (db-clear db)
+                  (zero? (db-size db)))))
+
+(comment
+  (clojure.pprint/pprint (mfs-contains))
+  (clojure.pprint/pprint (mfs-overwrite))
+  (clojure.pprint/pprint (mfs-clear))
+  )
+
+(def gen-clear (gen/return [:clear]))
+(def gen-size (gen/return [:size]))
+(def gen-write (gen/tuple (gen/return :write)
+                          gen-path
+                          gen-content))
+
+(def gen-delete (gen/tuple (gen/return :delete)
+                           gen-path))
+
+(def gen-read (gen/tuple (gen/return :read)
+                         gen-path))
+
+(def gen-ops (gen/vector (gen/one-of [gen-clear
+                                      gen-write
+                                      gen-delete
+                                      gen-read
+                                      gen-size])))
+
+(comment
+  (gen/sample gen-ops)
+  )
+
+(defn db-run [db ops]
+  (doseq [[op k v] ops]
+    (case op
+      :clear (db-clear db)
+      :size (db-size db)
+      :write (db-write db k v)
+      :delete (db-delete db k)
+      :read (db-read db k)
+      )))
+
+(defn hm-run [db ops]
+  (reduce
+    (fn [hm [op k v]]
+      (case op
+        :clear {}
+        :size hm
+        :write (assoc hm k v)
+        :delete (dissoc hm k)
+        :read hm))
+    db ops))
+
+(defn equiv? [db hm]
+  (and (= (count hm) (db-size db))
+       (every? (fn [[k v]]
+                 (= v (db-read db k)))
+               hm)))
+
+(defspec hash-map-equiv 1000
+  m
+  (prop/for-all [ops gen-ops]
+                (let [hm (hm-run {} ops)
+                      db (db-create)]
+                  (db-run db ops)
+                  (equiv? db hm))))
+
+(comment
+  (clojure.pprint/pprint (hash-map-equiv))
+  )
+
+;; generate sequence of actions to take
+;; throw in some threads
+;; check consistency