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vbetschvbetsch
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Merge pull request #1 from vbetsch/develop
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2 parents 446733a + 882a33a commit 7bbd351

4 files changed

Lines changed: 226 additions & 12 deletions

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‎src/main/java/io/github/vbetsch/codecracker/CodeCracker.java‎

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@@ -1,5 +1,31 @@
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package io.github.vbetsch.codecracker;
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public class CodeCracker {
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private final TranslationDictionary dictionary = new TranslationDictionary();
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public char decryptChar(char letter) {
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return dictionary.getDecryptions().get(letter);
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}
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public char encryptLetter(char character) {
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return dictionary.getEncryptions().get(character);
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}
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public String decryptString(String string) {
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StringBuilder stringBuilder = new StringBuilder();
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for (char character : string.toCharArray()) {
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stringBuilder.append(decryptChar(character));
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}
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return stringBuilder.toString();
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}
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public String encryptString(String string) {
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StringBuilder stringBuilder = new StringBuilder();
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for (char character : string.toCharArray()) {
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char lowerCaseChar = Character.toLowerCase(character);
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if (!dictionary.containsDecryptionValue(lowerCaseChar)) continue;
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stringBuilder.append(encryptLetter(lowerCaseChar));
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}
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return stringBuilder.toString();
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}
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}

‎src/main/java/io/github/vbetsch/codecracker/Main.java‎

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@@ -1,17 +1,9 @@
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package io.github.vbetsch.codecracker;
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//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
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// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
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public class Main {
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static void main() {
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//TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
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// to see how IntelliJ IDEA suggests fixing it.
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IO.println(String.format("Hello and welcome!"));
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for (int i = 1; i <= 5; i++) {
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//TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
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// for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
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IO.println("i = " + i);
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}
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CodeCracker codeCracker = new CodeCracker();
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IO.println(String.format("Hello world!"));
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System.out.println("Encrypted : " + codeCracker.encryptString("Hello world!"));
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}
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}

‎src/main/java/io/github/vbetsch/codecracker/TranslationDictionary.java‎

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package io.github.vbetsch.codecracker;
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import java.util.HashMap;
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import java.util.Map;
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import static java.util.Map.entry;
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public class TranslationDictionary {
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private final Map<Character, Character> decryptions = Map.ofEntries(
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entry('!', 'a'),
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entry(')', 'b'),
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entry('"', 'c'),
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entry('(', 'd'),
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entry('£', 'e'),
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entry('*', 'f'),
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entry('%', 'g'),
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entry('&', 'h'),
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entry('>', 'i'),
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entry('<', 'j'),
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entry('@', 'k'),
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entry('a', 'l'),
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entry('b', 'm'),
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entry('c', 'n'),
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entry('d', 'o'),
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entry('e', 'p'),
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entry('f', 'q'),
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entry('g', 'r'),
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entry('h', 's'),
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entry('i', 't'),
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entry('j', 'u'),
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entry('k', 'v'),
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entry('l', 'w'),
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entry('m', 'x'),
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entry('n', 'y'),
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entry('o', 'z')
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);
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private final Map<Character, Character> encryptions = invert(decryptions);
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private static Map<Character, Character> invert(Map<Character, Character> map) {
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Map<Character, Character> inverted = new HashMap<>();
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for (Map.Entry<Character, Character> entry : map.entrySet()) {
44+
inverted.put(entry.getValue(), entry.getKey());
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}
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return inverted;
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}
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public Map<Character, Character> getDecryptions() {
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return decryptions;
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}
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public Map<Character, Character> getEncryptions() {
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return encryptions;
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}
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public boolean containsDecryptionValue(char letter) {
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return decryptions.containsValue(letter);
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}
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}

‎src/test/java/io/github/vbetsch/codecracker/CodeCrackerTest.java‎

Lines changed: 137 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,15 +2,151 @@
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33
import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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class CodeCrackerTest {
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79
@Test
8-
void should_doSomething_whenSomeCondition() {
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void should_returnLetterA_whenDecryptExclamationPoint() {
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// Arrange
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CodeCracker codeCracker = new CodeCracker();
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// Act
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char decryptedExclamationPoint = codeCracker.decryptChar('!');
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// Assert
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assertEquals('a', decryptedExclamationPoint);
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}
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@Test
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void should_returnLetterB_whenDecryptEndParenthesis() {
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// Arrange
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CodeCracker codeCracker = new CodeCracker();
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// Act
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char decryptedEndParenthesis = codeCracker.decryptChar(')');
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// Assert
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assertEquals('b', decryptedEndParenthesis);
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}
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@Test
34+
void should_returnWordAB_whenDecryptExclamationPointAndEndParenthesis() {
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// Arrange
36+
CodeCracker codeCracker = new CodeCracker();
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// Act
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String decryptedString = codeCracker.decryptString("!)");
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// Assert
42+
assertEquals("ab", decryptedString);
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}
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@Test
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void should_decryptWordHello() {
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// Arrange
48+
CodeCracker codeCracker = new CodeCracker();
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// Act
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String decryptedString = codeCracker.decryptString("&£aad");
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// Assert
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assertEquals("hello", decryptedString);
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}
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@Test
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void should_decryptWordWorld() {
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// Arrange
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CodeCracker codeCracker = new CodeCracker();
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// Act
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String decryptedString = codeCracker.decryptString("ldga(");
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// Assert
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assertEquals("world", decryptedString);
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}
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@Test
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void should_returnExclamationPoint_whenEncryptLetterA() {
71+
// Arrange
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CodeCracker codeCracker = new CodeCracker();
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// Act
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char encryptedLetterA = codeCracker.encryptLetter('a');
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// Assert
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assertEquals('!', encryptedLetterA);
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}
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@Test
82+
void should_returnEndParenthesis_whenEncryptLetterB() {
83+
// Arrange
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CodeCracker codeCracker = new CodeCracker();
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// Act
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char encryptedLetterB = codeCracker.encryptLetter('b');
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// Assert
90+
assertEquals(')', encryptedLetterB);
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}
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@Test
94+
void should_returnExclamationPointAndEndParenthesis_whenEncryptAB() {
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// Arrange
96+
CodeCracker codeCracker = new CodeCracker();
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// Act
99+
String encryptedAB = codeCracker.encryptString("ab");
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// Assert
102+
assertEquals("!)", encryptedAB);
103+
}
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105+
@Test
106+
void should_encryptWordHello() {
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// Arrange
108+
CodeCracker codeCracker = new CodeCracker();
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// Act
111+
String encryptedHello = codeCracker.encryptString("hello");
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// Assert
114+
assertEquals("&£aad", encryptedHello);
115+
}
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@Test
118+
void should_encryptWordWorld() {
9119
// Arrange
10120
CodeCracker codeCracker = new CodeCracker();
11121

12122
// Act
123+
String encryptedWorld = codeCracker.encryptString("world");
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13125
// Assert
126+
assertEquals("ldga(", encryptedWorld);
14127
}
15128

129+
@Test
130+
void should_handleUpperCaseInEncrypt() {
131+
// Arrange
132+
CodeCracker codeCracker = new CodeCracker();
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// Act
135+
String encryptedHello = codeCracker.encryptString("Hello");
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137+
// Assert
138+
assertEquals("&£aad", encryptedHello);
139+
}
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141+
@Test
142+
void should_handleUnknownCharacters() {
143+
// Arrange
144+
CodeCracker codeCracker = new CodeCracker();
145+
146+
// Act
147+
String encryptedHello = codeCracker.encryptString("Hello !");
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// Assert
150+
assertEquals("&£aad", encryptedHello);
151+
}
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}

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