Contents

import org.scalatest.{Matchers, FunSuite}

class CipherTest extends FunSuite with Matchers {

  test("Random key cipher - can encode/decode") {
    // Here we take advantage of the fact that plaintext of "aaa..."
    // outputs the key. This is a critical problem with shift ciphers, some
    // characters will always output the key verbatim.

    val cipher = Cipher(None)
    cipher.encode("aaaaaaaaaa") should be (cipher.key.substring(0, 10))
    cipher.decode(cipher.key.substring(0, 10)) should be ("aaaaaaaaaa")
  }

  test("Invalid key - contains caps") {
    intercept[IllegalArgumentException] {
      Cipher(Some("ABCD"))
    }
  }

  test("Invalid key - contains numerics") {
    intercept[IllegalArgumentException] {
      Cipher(Some("123"))
    }
  }

  test("Invalid key - is empty") {
    intercept[IllegalArgumentException] {
      Cipher(Some(""))
    }
  }

  test("Substitution cipher - can encode") {
    Cipher(Some("abcdefghij")).encode("aaaaaaaaaa") should be ("abcdefghij")
  }

  test("Substitution cipher - can decode") {
    Cipher(Some("abcdefghij")).decode("abcdefghij") should be ("aaaaaaaaaa")
  }

  test("Substitution cipher - is reversible") {
    val cipher = Cipher(Some("abcdefghij"))
    cipher.decode(cipher.encode("abcdefghij")) should be ("abcdefghij")
  }

  test("Substitution cipher - can double shift") {
    val cipher = Cipher(Some("iamapandabear"))
    cipher.encode("iamapandabear") should be ("qayaeaagaciai")
  }

  test("Substitution cipher - can wrap") {
    Cipher(Some("abcdefghij")).encode("zzzzzzzzzz") should be ("zabcdefghi")
  }
}

Version data entries

12 entries across 12 versions & 1 rubygems

Version	Path
trackler-2.0.0.1	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-2.0.0.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.4.1	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.4.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.3.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.2.1	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.2.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.1.2	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.1.1	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.1.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.0.1	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala
trackler-1.0.0	tracks/scala/exercises/simple-cipher/src/test/scala/CipherTest.scala