feat: kata/i-before-e-except-after-c

Author: ParanoidUser

kata/7-kyu/i-before-e-except-after-c/README.md

@@ -6,15 +6,19 @@ There's a common mnemonic given to those learning English spelling which goes:
 
 > I before E except after C
 
-This suggests that when you have the letters `i` and `e` next to each other in a word, the `i` should come first, with the exception that if preceding the two vowels is the letter `c` in which case the `e` should go first.
+This suggests that when you have the letters `i` and `e` next to each other in a word, the `i` should come first, with the exception that if
+preceding the two vowels is the letter `c` in which case the `e` should go first.
 
-For example, this rule would tell you that the word for a close companion would be `"friend"` and not `"freind"`. For the `c` case, this means that when a package is mailed to you, you will `"receive"` it rather than `"recieve"` it.
+For example, this rule would tell you that the word for a close companion would be `"friend"` and not `"freind"`. For the `c` case, this
+means that when a package is mailed to you, you will `"receive"` it rather than `"recieve"` it.
 
-However, besides being incorrect for many cases (my weird foreign scientist neighbor taught me a few examples), it's not clear from this rule what to do with more unusual cases with multiple `i`s and `e`s.
+However, besides being incorrect for many cases (my weird foreign scientist neighbor taught me a few examples), it's not clear from this
+rule what to do with more unusual cases with multiple `i`s and `e`s.
 
 For the purposes of this kata our rule will be:
 
-> For any contiguous sequence of `i` or `e` characters, all the `i`s should come before all the `e`s. If, however, the sequence is immediately preceeded by a `c`, all the `e`s should come before all the `i`s.
+> For any contiguous sequence of `i` or `e` characters, all the `i`s should come before all the `e`s. If, however, the sequence is
+> immediately preceded by a `c`, all the `e`s should come before all the `i`s.
 
 ## Task
 
@@ -34,4 +38,4 @@ You'll also need to account for the weirder cases that may not exist in real Eng
 "eeiie" --> "iieee"
 "cieee" --> "ceeei"
 "eiicieeceie" --> "iieceeiceei"
-```
+```

kata/7-kyu/i-before-e-except-after-c/main/Solution.java

@@ -0,0 +1,11 @@
+import static java.util.regex.Pattern.compile;
+
+interface Solution {
+  static String iBeforeE(String s) {
+    return compile("c?([ie]+)").matcher(s).replaceAll(mr -> {
+      String es = mr.group(1).replace("i", "");
+      String is = mr.group(1).replace("e", "");
+      return mr.group().charAt(0) == 'c' ? "c" + es + is : is + es;
+    });
+  }
+}

kata/7-kyu/i-before-e-except-after-c/test/ExampleTests.java

@@ -0,0 +1,22 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+class ExampleTests {
+  @ParameterizedTest
+  @CsvSource(textBlock = """
+      freind, friend
+      friend, friend
+      recieve, receive
+      feireist, fieriest
+      sciencier, sceinceir
+      deities, dieties
+      eeiie, iieee
+      cieee, ceeei
+      eiicieeceie, iieceeiceei
+      """)
+  void sample(String word, String expected) {
+    assertEquals(expected, Solution.iBeforeE(word));
+  }
+}