Refactor: redesign ColumnarTranspositionCipher #5223
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## master #5223 +/- ##
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+ Coverage 40.35% 40.68% +0.32%
- Complexity 2486 2501 +15
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Files 519 519
Lines 15479 15440 -39
Branches 2950 2943 -7
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+ Hits 6247 6282 +35
+ Misses 8943 8867 -76
- Partials 289 291 +2 ☔ View full report in Codecov by Sentry. |
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Please focus on #5221 first. |
samuelfac
requested review from
yanglbme,
vil02 and
BamaCharanChhandogi
as code owners
| for (int i = 0; i < sortedTable[0].length; i++) { | ||
| for (int j = 1; j < sortedTable.length; j++) { | ||
| wordEncrypted.append(sortedTable[j][i]); | ||
| public static String encrypt(String message, String key) { |
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| public static String encrypt(String message, String key) { | |
| public static String encrypt(final String message, final String key) { |
| wordEncrypted.append(sortedTable[j][i]); | ||
| public static String encrypt(String message, String key) { | ||
| int numColumns = key.length(); | ||
| int numRows = (int) Math.ceil((double) message.length() / numColumns); |
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This deserves a separate method, especially because it is used in decrypt.
| for (int i = 1; i < table.length; i++) { | ||
| for (Object item : table[i]) { | ||
| wordDecrypted.append(item); | ||
| public static String decrypt(String message, String key) { |
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| public static String decrypt(String message, String key) { | |
| public static String decrypt(final String message, final String key) { |
| @ParameterizedTest | ||
| @MethodSource("provideTestCases") | ||
| void encrypt(String key, String word) { | ||
| assertNotEquals(word, ColumnarTranspositionCipher.encrypt(word, key)); | ||
| } | ||
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| @ParameterizedTest | ||
| @MethodSource("provideTestCases") | ||
| void decrypt(String key, String word) { | ||
| String encrypted = ColumnarTranspositionCipher.encrypt(word, key); | ||
| assertEquals(word, ColumnarTranspositionCipher.decrypt(encrypted, key)); | ||
| } | ||
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| private static Stream<Arguments> provideTestCases() { | ||
| return Stream.of(Arguments.of("asd215", "This is a test of the Columnar Transposition Cipher"), // | ||
| Arguments.of("test123456", "test"), // | ||
| Arguments.of("my long secret pass 1234567890", "short message"), // | ||
| Arguments.of("secret", "My secret message") // | ||
| ); | ||
| } |
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These tests check only that ColumnarTranspositionCipher.encrypt is not an identity and that encrypt is an inverse of decrypt. I would highly suggest to:
- add the expected into the test cases, i.e. each test case should consists of
message,key,encrypted. - remove the
encrypttest (in its current form), - add test cases with empty
wordand/orkey, - (as discussed earlier) remove the
//
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Related to #5164
clang-format -i --style=file path/to/your/file.java