Sell book works!

test/book/test_PersistentSortedList.clj

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+(ns book.test-PersistentSortedList
+  (:require [clojure.test :refer :all]
+            [book.core :refer [sorted-list sorted-list-by]]))
+
+
+
+(deftest test-match-buy-order-in-sell-book
+  (testing "Test ordering."
+    (is (= (sorted-list 1 2 3) (sorted-list 3 2 1)))
+    (is (= (sorted-list 1 2 2 3) (sorted-list 3 2 1 2))))
+  (testing "count"
+    (is (= (count (sorted-list)) 0))
+    (is (= (count (sorted-list 1 2 3)) 3))
+    (is (= (count (sorted-list 1 2 3 2)) 4)))
+  (testing "rest"
+    (is (= (rest (sorted-list 1 2 3)) (sorted-list 2 3)))
+    (is (= (rest (sorted-list 1 2 3 2)) (sorted-list 2 2 3)))
+    (is (= (rest (sorted-list 1)) (list)))
+    (is (= (rest (sorted-list)) (list))))
+  (testing "next"
+    (is (= (next (sorted-list 1 2 3)) (sorted-list 2 3)))
+    (is (= (next (sorted-list 1 2 3 2)) (sorted-list 2 2 3)))
+    (is (= (next (sorted-list 1)) nil))
+    (is (= (next (sorted-list)) nil)))
+  (testing "drop"
+    (is (= (drop 2 (sorted-list 1 2 3)) (sorted-list 3)))
+    (is (= (drop 3 (sorted-list 1 2 3)) (list))))
+  (testing "reduce"
+    (is (= (reduce + (sorted-list 1 2 3)) 6))
+    (is (= (reduce + 10 (sorted-list 1 2 3)) 16)))
+  (testing "peek/pop"
+    (is (= (peek (sorted-list 1 2 3)) 1))
+    (is (= (peek (sorted-list 1 1 1 2 3)) 1))
+    (is (= (peek (sorted-list)) nil))
+    (is (= (pop (sorted-list 1 2 3)) (sorted-list 2 3)))
+    (is (= (pop (sorted-list 1 1 2 3)) (sorted-list 1 2 3)))
+    (is (= (pop (sorted-list 1 1 1 2 3)) (sorted-list 1 1 2 3)))
+    (is (thrown? IllegalStateException (pop (sorted-list)) nil)))
+  (testing "count after change"
+    (let [l (sorted-list 1 2 3)]
+      (is (= (count (conj l 4)) 4))
+      (is (= (count (conj l 3)) 4))
+      (is (= (count (cons 3 l)) 4))
+      (is (= (count (rest l)) 2))
+      (is (= (count (pop l)) 2))))
+  (testing "sorted-list-by"
+    (is (= (sorted-list-by > 1 2 3) [3 2 1]))))