atbash

elixir/atbash-cipher/test/atbash_test.exs

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+defmodule AtbashTest do
+  use ExUnit.Case
+
+  describe "encode" do
+    test "yes" do
+      assert Atbash.encode("yes") == "bvh"
+    end
+
+    test "no" do
+      assert Atbash.encode("no") == "ml"
+    end
+
+    test "OMG" do
+      assert Atbash.encode("OMG") == "lnt"
+    end
+
+    test "O M G" do
+      assert Atbash.encode("O M G") == "lnt"
+    end
+
+    test "mindblowingly" do
+      assert Atbash.encode("mindblowingly") == "nrmwy oldrm tob"
+    end
+
+    test "numbers" do
+      assert Atbash.encode("Testing, 1 2 3, testing.") == "gvhgr mt123 gvhgr mt"
+    end
+
+    test "deep thought" do
+      assert Atbash.encode("Truth is fiction.") == "gifgs rhurx grlm"
+    end
+
+    test "all the letters" do
+      plaintext = "The quick brown fox jumps over the lazy dog."
+      cipher = "gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt"
+      assert Atbash.encode(plaintext) == cipher
+    end
+  end
+
+  describe "decode" do
+    test "exercism" do
+      cipher = "vcvix rhn"
+      plaintext = "exercism"
+      assert Atbash.decode(cipher) == plaintext
+    end
+
+    test "a sentence" do
+      cipher = "zmlyh gzxov rhlug vmzhg vkkrm thglm v"
+      plaintext = "anobstacleisoftenasteppingstone"
+      assert Atbash.decode(cipher) == plaintext
+    end
+
+    test "numbers" do
+      cipher = "gvhgr mt123 gvhgr mt"
+      plaintext = "testing123testing"
+      assert Atbash.decode(cipher) == plaintext
+    end
+
+    test "all the letters" do
+      cipher = "gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt"
+      plaintext = "thequickbrownfoxjumpsoverthelazydog"
+      assert Atbash.decode(cipher) == plaintext
+    end
+
+    test "with too many spaces" do
+      cipher = "vc vix    r hn"
+      plaintext = "exercism"
+      assert Atbash.decode(cipher) == plaintext
+    end
+
+    test "with no spaces" do
+      cipher = "zmlyhgzxovrhlugvmzhgvkkrmthglmv"
+      plaintext = "anobstacleisoftenasteppingstone"
+      assert Atbash.decode(cipher) == plaintext
+    end
+  end
+end

elixir/atbash-cipher/test/test_helper.exs

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+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true)