Java/src/test/java/com/thealgorithms/ciphers/VigenereTest.java at master · TheAlgorithms/Java · GitHub

Name: Java/src/test/java/com/thealgorithms/ciphers/VigenereTest.java at master · TheAlgorithms/Java · GitHub
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packagecom.thealgorithms.ciphers;

importstaticorg.junit.jupiter.api.Assertions.assertEquals;
importstaticorg.junit.jupiter.api.Assertions.assertThrows;

importorg.junit.jupiter.api.Test;

classVigenereTest {

Vigenerevigenere = newVigenere();

@Test
voidtestVigenereEncryptDecrypt() {
Stringtext = "Hello World!";
Stringkey = "suchsecret";

StringencryptedText = vigenere.encrypt(text, key);
StringdecryptedText = vigenere.decrypt(encryptedText, key);

assertEquals("Zynsg Aqipw!", encryptedText);
assertEquals("Hello World!", decryptedText);
 }

@Test
voidtestWithEmptyMessage() {
Stringtext = "";
Stringkey = "anykey";

StringencryptedText = vigenere.encrypt(text, key);
StringdecryptedText = vigenere.decrypt(encryptedText, key);

assertEquals("", encryptedText);
assertEquals("", decryptedText);
 }

@Test
voidtestWithEmptyKey() {
Stringtext = "This should remain the same";
Stringkey = "";

assertThrows(IllegalArgumentException.class, () -> vigenere.encrypt(text, key));
assertThrows(IllegalArgumentException.class, () -> vigenere.decrypt(text, key));
 }

@Test
voidtestWithNumbersInMessage() {
Stringtext = "Vigenere123!";
Stringkey = "cipher";

StringencryptedText = vigenere.encrypt(text, key);
StringdecryptedText = vigenere.decrypt(encryptedText, key);

assertEquals("Xqvlrvtm123!", encryptedText);
assertEquals(text, decryptedText);
 }

@Test
voidtestLongerKeyThanMessage() {
Stringtext = "Short";
Stringkey = "VeryLongSecretKey";

StringencryptedText = vigenere.encrypt(text, key);
StringdecryptedText = vigenere.decrypt(encryptedText, key);

assertEquals("Nlfpe", encryptedText);
assertEquals(text, decryptedText);
 }

@Test
voidtestUppercaseMessageAndKey() {
Stringtext = "HELLO";
Stringkey = "SECRET";

StringencryptedText = vigenere.encrypt(text, key);
StringdecryptedText = vigenere.decrypt(encryptedText, key);

assertEquals("ZINCS", encryptedText);
assertEquals(text, decryptedText);
 }
}