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Add Junit tests for ColumnarTranspositionCipher.java (#5599)

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This commit is contained in:
Hardik Pawar
2024-10-07 20:41:56 +05:30
committed by GitHub
parent f80850b244
commit 25dc55e4ae
3 changed files with 48 additions and 20 deletions
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1
DIRECTORY.md
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@ -641,6 +641,7 @@
* [AutokeyTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/AutokeyTest.java)
* [BlowfishTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/BlowfishTest.java)
* [CaesarTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/CaesarTest.java)
* [ColumnarTranspositionCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/ColumnarTranspositionCipherTest.java)
* [DESTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/DESTest.java)
* [HillCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/HillCipherTest.java)
* [PlayfairTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/PlayfairTest.java)

20
src/main/java/com/thealgorithms/ciphers/ColumnarTranspositionCipher.java
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@ -184,24 +184,4 @@ public final class ColumnarTranspositionCipher {
}
abecedarium = t.toString();
}
private static void showTable() {
for (Object[] table1 : table) {
for (Object item : table1) {
System.out.print(item + " ");
}
System.out.println();
}
}
public static void main(String[] args) {
String keywordForExample = "asd215";
String wordBeingEncrypted = "This is a test of the Columnar Transposition Cipher";
System.out.println("### Example of Columnar Transposition Cipher ###\n");
System.out.println("Word being encryped ->>> " + wordBeingEncrypted);
System.out.println("Word encrypted ->>> " + ColumnarTranspositionCipher.encrpyter(wordBeingEncrypted, keywordForExample));
System.out.println("Word decryped ->>> " + ColumnarTranspositionCipher.decrypter());
System.out.println("\n### Encrypted Table ###");
showTable();
}
}

47
src/test/java/com/thealgorithms/ciphers/ColumnarTranspositionCipherTest.java Normal file
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@ -0,0 +1,47 @@
package com.thealgorithms.ciphers;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
public class ColumnarTranspositionCipherTest {
private String keyword;
private String plaintext;
@BeforeEach
public void setUp() {
keyword = "keyword";
plaintext = "This is a test message for Columnar Transposition Cipher";
}
@Test
public void testEncryption() {
String encryptedText = ColumnarTranspositionCipher.encrpyter(plaintext, keyword);
assertNotNull(encryptedText, "The encrypted text should not be null.");
assertFalse(encryptedText.isEmpty(), "The encrypted text should not be empty.");
// Check if the encrypted text is different from the plaintext
assertNotEquals(plaintext, encryptedText, "The encrypted text should be different from the plaintext.");
}
@Test
public void testDecryption() {
String encryptedText = ColumnarTranspositionCipher.encrpyter(plaintext, keyword);
String decryptedText = ColumnarTranspositionCipher.decrypter();
assertEquals(plaintext.replaceAll(" ", ""), decryptedText.replaceAll(" ", ""), "The decrypted text should match the original plaintext, ignoring spaces.");
assertEquals(encryptedText, ColumnarTranspositionCipher.encrpyter(plaintext, keyword), "The encrypted text should be the same when encrypted again.");
}
@Test
public void testLongPlainText() {
String longText = "This is a significantly longer piece of text to test the encryption and decryption capabilities of the Columnar Transposition Cipher. It should handle long strings gracefully.";
String encryptedText = ColumnarTranspositionCipher.encrpyter(longText, keyword);
String decryptedText = ColumnarTranspositionCipher.decrypter();
assertEquals(longText.replaceAll(" ", ""), decryptedText.replaceAll(" ", ""), "The decrypted text should match the original long plaintext, ignoring spaces.");
assertEquals(encryptedText, ColumnarTranspositionCipher.encrpyter(longText, keyword), "The encrypted text should be the same when encrypted again.");
}
}