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Enhance docs, add more tests in Vigenere
(#5899)
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@ -1,6 +1,7 @@
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package com.thealgorithms.ciphers;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import org.junit.jupiter.api.Test;
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@ -9,28 +10,71 @@ class VigenereTest {
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Vigenere vigenere = new Vigenere();
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@Test
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void vigenereEncryptTest() {
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// given
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void testVigenereEncryptDecrypt() {
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String text = "Hello World!";
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String key = "suchsecret";
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// when
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String cipherText = vigenere.encrypt(text, key);
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String encryptedText = vigenere.encrypt(text, key);
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String decryptedText = vigenere.decrypt(encryptedText, key);
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// then
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assertEquals("Zynsg Yfvev!", cipherText);
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assertEquals("Zynsg Aqipw!", encryptedText);
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assertEquals("Hello World!", decryptedText);
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}
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@Test
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void vigenereDecryptTest() {
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// given
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String encryptedText = "Zynsg Yfvev!";
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String key = "suchsecret";
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void testWithEmptyMessage() {
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String text = "";
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String key = "anykey";
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// when
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String encryptedText = vigenere.encrypt(text, key);
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String decryptedText = vigenere.decrypt(encryptedText, key);
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// then
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assertEquals("Hello World!", decryptedText);
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assertEquals("", encryptedText);
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assertEquals("", decryptedText);
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}
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@Test
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void testWithEmptyKey() {
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String text = "This should remain the same";
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String key = "";
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assertThrows(IllegalArgumentException.class, () -> vigenere.encrypt(text, key));
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assertThrows(IllegalArgumentException.class, () -> vigenere.decrypt(text, key));
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}
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@Test
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void testWithNumbersInMessage() {
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String text = "Vigenere123!";
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String key = "cipher";
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String encryptedText = vigenere.encrypt(text, key);
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String decryptedText = vigenere.decrypt(encryptedText, key);
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assertEquals("Xqvlrvtm123!", encryptedText);
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assertEquals(text, decryptedText);
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}
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@Test
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void testLongerKeyThanMessage() {
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String text = "Short";
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String key = "VeryLongSecretKey";
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String encryptedText = vigenere.encrypt(text, key);
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String decryptedText = vigenere.decrypt(encryptedText, key);
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assertEquals("Nlfpe", encryptedText);
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assertEquals(text, decryptedText);
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}
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@Test
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void testUppercaseMessageAndKey() {
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String text = "HELLO";
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String key = "SECRET";
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String encryptedText = vigenere.encrypt(text, key);
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String decryptedText = vigenere.decrypt(encryptedText, key);
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assertEquals("ZINCS", encryptedText);
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assertEquals(text, decryptedText);
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}
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}
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