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;; Copyright (c) Meikel Brandmeyer. All rights reserved.
;; The use and distribution terms for this software are covered by the
;; Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
;; which can be found in the file epl-v10.html at the root of this distribution.
;; By using this software in any fashion, you are agreeing to be bound by
;; the terms of this license.
;; You must not remove this notice, or any other, from this software.
(ns nrepl.bencode-test
(:require [clojure.test :refer [are deftest is testing]]
[nrepl.bencode :as bencode :refer [read-bencode
read-netstring
write-bencode
write-netstring]])
(:import clojure.lang.RT
[java.io ByteArrayInputStream ByteArrayOutputStream PushbackInputStream]))
(defn #^{:private true} >bytes
[#^String input]
(.getBytes input "UTF-8"))
(defmulti #^{:private true} <bytes class)
(defmethod <bytes :default
[input]
input)
(defmethod <bytes (RT/classForName "[B")
[#^"[B" input]
(String. input "UTF-8"))
(defmethod <bytes clojure.lang.IPersistentVector
[input]
(vec (map <bytes input)))
(defmethod <bytes clojure.lang.IPersistentMap
[input]
(->> input
(map (fn [[k v]] [k (<bytes v)]))
(into {})))
(defn- decode
[bytes & {:keys [reader]}]
(-> bytes
ByteArrayInputStream.
PushbackInputStream.
reader))
(defn- >input
[^String input & args]
(-> input
(.getBytes "UTF-8")
(#(apply decode % args))
<bytes))
(deftest test-netstring-reading
(are [x y] (= (>input x :reader read-netstring) y)
"0:," ""
"13:Hello, World!," "Hello, World!"
"16:Hällö, Würld!," "Hällö, Würld!"
"25:Здравей, Свят!," "Здравей, Свят!"))
(deftest test-string-reading
(are [x y] (= (>input x :reader read-bencode) y)
"0:" ""
"13:Hello, World!" "Hello, World!"
"16:Hällö, Würld!" "Hällö, Würld!"
"25:Здравей, Свят!" "Здравей, Свят!"))
(deftest test-integer-reading
(are [x y] (= (>input x :reader read-bencode) y)
"i0e" 0
"i42e" 42
"i-42e" -42))
(deftest test-list-reading
(are [x y] (= (>input x :reader read-bencode) y)
"le" []
"l6:cheesee" ["cheese"]
"l6:cheese3:ham4:eggse" ["cheese" "ham" "eggs"]))
(deftest test-map-reading
(are [x y] (= (>input x :reader read-bencode) y)
"de" {}
"d3:ham4:eggse" {"ham" "eggs"}))
(deftest test-nested-reading
(are [x y] (= (>input x :reader read-bencode) y)
"l6:cheesei42ed3:ham4:eggsee" ["cheese" 42 {"ham" "eggs"}]
"d6:cheesei42e3:haml4:eggsee" {"cheese" 42 "ham" ["eggs"]}))
(defn- ^ByteArrayOutputStream >stream
[thing & {:keys [writer]}]
(doto (ByteArrayOutputStream.)
(writer thing)))
(defn- >output
[& args]
(-> >stream
^ByteArrayOutputStream (apply args)
(.toString "UTF-8")))
(deftest test-netstring-writing
(are [x y] (= (>output (>bytes x) :writer write-netstring) y)
"" "0:,"
"Hello, World!" "13:Hello, World!,"
"Hällö, Würld!" "16:Hällö, Würld!,"
"Здравей, Свят!" "25:Здравей, Свят!,"))
(deftest test-byte-array-writing
(are [x y] (= (>output (>bytes x) :writer write-bencode) y)
"" "0:"
"Hello, World!" "13:Hello, World!"
"Hällö, Würld!" "16:Hällö, Würld!"
"Здравей, Свят!" "25:Здравей, Свят!"))
(deftest test-string-writing
(are [x y] (= (>output x :writer write-bencode) y)
"" "0:"
"Hello, World!" "13:Hello, World!"
"Hällö, Würld!" "16:Hällö, Würld!"
"Здравей, Свят!" "25:Здравей, Свят!"))
(deftest test-input-stream-writing
(are [x y] (= (>output (ByteArrayInputStream. (>bytes x))
:writer write-bencode) y)
"" "0:"
"Hello, World!" "13:Hello, World!"
"Hällö, Würld!" "16:Hällö, Würld!"
"Здравей, Свят!" "25:Здравей, Свят!"))
(deftest test-integer-writing
(are [x y] (= (>output x :writer write-bencode) y)
0 "i0e"
42 "i42e"
-42 "i-42e"
;; Works for all integral types.
;; Note: BigInts (42N) not tested, since they are not
;; supported in 1.2.
(Byte/parseByte "42" 10) "i42e"
(Short/parseShort "42" 10) "i42e"
(Integer/parseInt "42" 10) "i42e"
(Long/parseLong "42" 10) "i42e"))
(deftest test-named-writing
(are [x y] (= (>output x :writer write-bencode) y)
:foo "3:foo"
:foo/bar "7:foo/bar"
'foo "3:foo"
'foo/bar "7:foo/bar"))
(deftest test-list-writing
(are [x y] (= (>output x :writer write-bencode) y)
nil "le"
[] "le"
["cheese"] "l6:cheesee"
["cheese" "ham" "eggs"] "l6:cheese3:ham4:eggse"))
(deftest test-map-writing
(are [x y] (= (>output x :writer write-bencode) y)
{} "de"
{"ham" "eggs"} "d3:ham4:eggse"
{:ham "eggs"} "d3:ham4:eggse"
{'ham "eggs"} "d3:ham4:eggse"
{:h/am "eggs"} "d4:h/am4:eggse"))
(deftest test-nested-writing
(are [x y] (= (>output x :writer write-bencode) y)
["cheese" 42 {"ham" "eggs"}] "l6:cheesei42ed3:ham4:eggsee"
{"cheese" 42 "ham" ["eggs"]} "d6:cheesei42e3:haml4:eggsee"))
(deftest test-lexicographic-sorting
(let [source ["ham" "eggs" "hamburg" "hamburger" "cheese"]
expected ["cheese" "eggs" "ham" "hamburg" "hamburger"]
to-test (->> source
(map >bytes)
(sort @#'nrepl.bencode/lexicographically)
(map <bytes))]
(is (= to-test expected))))
(deftest unencoded-values
;; just some PNG data that won't round-trip cleanly through UTF-8 encoding, so
;; any default encoding in the bencode implementation will be caught immediately
(let [binary-data (->> [-119 80 78 71 13 10 26 10 0 0 0 13 73 72 68 82 0 0 0
100 0 0 0 100 8 6 0 0 0 112 -30 -107 84 0 0 3 -16 105
67 67 80 73 67 67 32 80 114 111 102 105 108 101 0 0 40
-111 -115 85 -35 111 -37 84 20 63 -119 111 92 -92 22 63
-96 -79 -114 14 21 -117 -81 85 83 91 -71 27 26 -83 -58 6
73 -109 -91 -23 66 26 -71 -51 -40 42 -92 -55 117 110]
(map byte)
(into-array Byte/TYPE))]
(is (= (seq binary-data)
(-> {"data" binary-data}
(>stream :writer write-bencode)
.toByteArray
(decode :reader read-bencode)
(get "data")
seq)))))
(deftest unwritable-values
(testing "write-bencode writes eagerly"
(let [out (ByteArrayOutputStream.)]
(is (thrown? IllegalArgumentException
(write-bencode out {"obj" (Object.)})))
(is (= "d3:obj" (String. (.toByteArray out)))))))
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