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(ns flatland.ordered.map-test
(:require [clojure.test :refer [deftest testing is are]]
[flatland.ordered.map :refer [#?(:cljs OrderedMap) ordered-map]]
#?(:clj [flatland.ordered.common :refer [compact]]
:cljs [cljs.reader :as reader]))
#?(:clj (:import flatland.ordered.map.OrderedMap)))
#?(:cljs
(defn read-string [s]
(reader/read-string {:readers {'ordered/map ordered-map}} s)))
(deftest implementations
(let [basic (ordered-map)]
#?(:clj
(testing "Interfaces marked as implemented"
(are [class] (instance? class basic)
clojure.lang.IPersistentMap
clojure.lang.IPersistentCollection
clojure.lang.Counted
clojure.lang.Associative
java.util.Map)))
(testing "Behavior smoke testing"
(testing "Most operations don't change type"
(are [object] (= (type object) (type basic))
(conj basic [1 2])
(assoc basic 1 2)
(into basic {1 2})))
(testing "Seq-oriented operations return nil when empty"
(are [object] (nil? object)
(seq basic)
(rseq basic)))
(testing "Metadata"
(is (nil? (seq (meta basic))))
(is (= 10 (-> basic
(with-meta {:size 10})
meta
:size)))
(is (= {:succeeded true}
(-> basic
(vary-meta assoc :succeeded true)
meta)))
(is (= {:meta :here}
(-> basic
(with-meta {:meta :here})
(assoc :a :b)
(empty)
(meta))))
(testing "Metadata doesn't affect other properties"
(let [m (with-meta basic {:a 1})]
(is (instance? OrderedMap m))
(is (= m basic))))
(testing "Metadata behaves like map's metadata"
(let [meta-map {:meta 1}
m1 (with-meta {} meta-map)
m2 (with-meta basic meta-map)]
(is (= (meta (assoc m1 1 2))
(meta (assoc m2 1 2))))))))))
(deftest equality
(let [empty (ordered-map)
one-item (assoc empty 1 2)]
(testing "Basic symmetric equality"
(is (= {} empty))
(is (= empty {}))
(is (= {1 2} one-item))
(is (= one-item {1 2})))
(testing "Order-insensitive comparisons"
(let [one-way (into empty {1 2 3 4})
other-way (into empty {3 4 1 2})
unsorted {1 2 3 4}]
(is (= one-way other-way))
(is (= one-way unsorted))
(is (= other-way unsorted))))
(testing "Hash code sanity"
(is (integer? (hash one-item)))
(is (= #{one-item} (into #{} [one-item {1 2}]))))
(testing "nil values don't break .equiv"
(is (not= (ordered-map :x nil) {:y 0})))))
(deftest ordering
(let [values [[:first 10]
[:second 20]
[:third 30]]
m (ordered-map values)]
(testing "Seq behaves like on a seq of vectors"
(is (= (seq values) (seq m))))
(testing "New values get added at the end"
(let [entry [:fourth 40]]
(is (= (seq (conj values entry))
(seq (conj m entry))))))
(testing "Changing old mappings leaves them at the same location"
(let [vec-index [1]
vec-key (conj vec-index 1)
map-key (get-in values (conj vec-index 0))
new-value 5]
(is (= (seq (assoc-in values vec-key new-value))
(seq (assoc m map-key new-value))))))
(testing "Large number of keys still sorted"
(let [kvs (for [n (range 5000)]
[(str n) n])
expected (into values kvs)
ordered (into m kvs)]
(is (= (seq expected) (seq ordered)))))))
(deftest reversing
(let [source (vec (for [n (range 10)]
[n n]))
m (into (ordered-map) source)]
(is (= (rseq m) (rseq source)))))
(deftest map-features
(let [m (ordered-map :a 1 :b 2 :c 3)]
(testing "Keyword lookup"
(is (= 1 (:a m))))
(testing "Sequence views"
(is (= [:a :b :c] (keys m)))
(is (= [1 2 3] (vals m))))
(testing "IFn support"
(is (= 2 (m :b)))
(is (= 'not-here (m :nothing 'not-here)))
(is (= nil ((ordered-map {:x nil}) :x 'not-here))) )
(testing "Get out Map.Entry"
(is (= [:a 1] (find m :a))))
(testing "Get out Map.Entry with falsy value"
(is (= [:a nil] (find (ordered-map {:a nil}) :a))))
(testing "Ordered dissoc"
(let [m (dissoc m :b)]
(is (= [:a :c] (keys m)))
(is (= [1 3] (vals m)))))
(testing "Can conj a map"
(is (= {:a 1 :b 2 :c 3 :d 4} (conj m {:d 4}))))
(testing "(conj m nil) returns m"
(are [x] (= m x)
(conj m nil)
(merge m ())
(into m ()))))
(let [m (ordered-map :a '("spark") :b '("flare" "bolt"))]
(testing "assoc replaces values if not identical?"
(is (vector? (-> m
(update-in [:a] vec)
(get :a)))))))
#?(:clj
(deftest object-features
(let [m (ordered-map 'a 1 :b 2)]
(is (= "{a 1, :b 2}" (str m))))))
#?(:clj
(deftest transient-support
(let [m (ordered-map {1 2 7 8})]
(testing "Basic transient conj!"
(let [t (transient m)
t (conj! t [3 4])
t (conj! t [3 4])
p (persistent! t)]
(is (= p (conj m [3 4])))))
(testing "Transients still keep order"
(let [t (transient m)
t (assoc! t 0 1)
p (persistent! t)]
(is (= (concat (seq m) '([0 1]))
(seq p)))))
(testing "Transients can overwrite existing entries"
(let [t (transient m)
t (assoc! t 1 5)
p (persistent! t)]
(is (= p (assoc m 1 5)))))
(testing "Transients can dissoc!"
(let [k (key (first m))
t (transient m)
t (dissoc! t k)]
(is (= (persistent! t)
(dissoc m k)))))
(testing "Can't edit transient after calling persistent!"
(let [more [[:a 1] [:b 2]]
t (transient m)
t (reduce conj! t more)
p (persistent! t)]
(is (thrown? Throwable (assoc! t :c 3)))
(is (= (into m more) p))))
(testing "Transients are never equal to other objects"
(let [[t1 t2 :as ts] (repeatedly 2 #(transient m))
holder (apply hash-set ts)]
(is (not= t1 t2))
(is (= (count ts) (count holder)))
(are [t] (= t (holder t))
t1 t2))))))
(deftest print-and-read-ordered
(let [s (ordered-map 1 2, 3 4, 5 6, 1 9, 7 8)]
(is (= "#ordered/map ([1 9] [3 4] [5 6] [7 8])"
(pr-str s)))
(let [o (read-string (pr-str s))]
(is (= OrderedMap (type o)))
(is (= '([1 9] [3 4] [5 6] [7 8])
(seq o))))))
#?(:clj
(deftest print-read-eval-ordered
(is (= (pr-str (eval (read-string "#ordered/map[[:a 1] [:b 2]]")))
"#ordered/map ([:a 1] [:b 2])"))
(is (= (pr-str (eval (read-string "#ordered/map[[1 2] [3 4] [5 6] [1 9] [7 8]]")))
"#ordered/map ([1 9] [3 4] [5 6] [7 8])"))))
#?(:clj
(deftest compacting
(let [m1 (ordered-map :a 1 :b 2 :c 3)
m2 (dissoc m1 :b)
m3 (compact m2)
m4 (dissoc m3 :c)]
(is (= m2 (ordered-map :a 1 :c 3)))
(is (= m3 m2))
(is (= m4 (ordered-map :a 1))))))
#?(:clj
(deftest same-hash
(let [m1 (ordered-map :a 1 :b 2 :c 3)
m2 (hash-map :a 1 :b 2 :c 3)
m3 (array-map :a 1 :b 2 :c 3)]
(is (= (hash m1) (hash m2) (hash m3)))
(is (= (.hashCode m1) (.hashCode m2) (.hashCode m3)))
(is (= (hash (ordered-map)) (hash (hash-map)) (hash (array-map))))
(is (= (.hashCode (ordered-map)) (.hashCode (hash-map)) (.hashCode (array-map)))))))
#?(:clj
(deftest nil-hash-code-npe
;; No assertions here; just check that it doesn't NPE
;; See: https://github.com/amalloy/ordered/issues/27
(are [contents] (.hashCode (ordered-map contents))
[[nil :a]]
[[:a nil]]
[[nil nil]])))
|
