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Versions: 89
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Contents
import org.junit.Before
import org.junit.Test
import kotlin.test.assertEquals
import kotlin.test.assertNotEquals
import kotlin.test.assertTrue
class RandomKeyCipherTest {
private lateinit var cipher: Cipher
@Before
fun setup() {
cipher = Cipher()
}
@Test
fun cipherKeyIsMadeOfLetters() {
assertTrue(cipher.key.matches(Regex("[a-z]+")))
}
@Test
fun defaultCipherKeyIs100Characters() {
assertEquals(100, cipher.key.length)
}
@Test
fun cipherKeysAreRandomlyGenerated() {
assertNotEquals(Cipher().key, cipher.key)
}
/**
* Here we take advantage of the fact that plaintext of "aaa..." doesn't output the key. This is a critical problem
* with shift ciphers, some characters will always output the key verbatim.
*/
@Test
fun cipherCanEncode() {
val expectedOutput = cipher.key.substring(0, 10)
assertEquals(expectedOutput, cipher.encode("aaaaaaaaaa"))
}
@Test
fun cipherCanDecode() {
val expectedOutput = "aaaaaaaaaa"
assertEquals(expectedOutput, cipher.decode(cipher.key.substring(0, 10)))
}
@Test
fun cipherIsReversible() {
val plainText = "abcdefghij"
assertEquals(plainText, cipher.decode(cipher.encode(plainText)))
}
}
Version data entries
89 entries across 89 versions & 1 rubygems