Add functions to get possible keys.

test/cipher_analytical_machine/analyzers/simple_substitution_test.clj

@@ -0,0 +1,23 @@
+(ns cipher-analytical-machine.analyzers.simple-substitution-test
+  (:require
+   [clojure.test :refer :all]
+   [cipher-analytical-machine.symbols.frequencies :as sf]
+   [cipher-analytical-machine.ciphers.simple-substitution :as ss]
+   [cipher-analytical-machine.analyzers.simple-substitution :refer :all])
+  (:gen-class))
+
+(deftest get-possible-keys-vector-test
+  (testing "The vector must be ordered by symbols"
+    (are [possible-keys-map symbols expected-key-vector]
+        (= expected-key-vector (get-possible-key-vector possible-keys-map symbols))
+      {\a [\a \b] \b [\b \a] \c [\a \c]} "abc" [[\a \b] [\b \a] [\a \c]]
+      {\a [\a \b] \c [\b \a] \b [\a \c]} "abc" [[\a \b] [\a \c] [\b \a]])))
+
+(deftest get-possible-keys-test
+  (testing "The keys must be the all combinations"
+    (are [possible-keys-vector expected-keys]
+        (= expected-keys (get-possible-keys possible-keys-vector))
+      [[\a \b] [\f] [\a \c] [\g]] '("afag" "afcg" "bfag" "bfcg")
+      [[\a \b] [\a \c]] '("aa" "ac" "ba" "bc")
+      [[\a \b \c] [\a \c] [\b \c]] '("aab" "aac" "acb" "acc" "bab" "bac" "bcb" "bcc" "cab" "cac" "ccb" "ccc"))))
+