feat: kata/get-the-length-of-a-string

Author: ParanoidUser

kata/7-kyu/get-the-length-of-a-string/README.md

@@ -1,27 +1,20 @@
 # [Get the 𝑟𝑒𝑎𝑙 length of a string](https://www.codewars.com/kata/get-the-length-of-a-string "https://www.codewars.com/kata/599c4b69eb8e49effa000079")
 
-In languages that use [UTF-16 encoding](https://en.wikipedia.org/wiki/UTF-16) for strings (JavaScript, JVM languages like Java, .NET languages like C#...), if the code point of a character is larger than `0xFFFF`, it will be treated as two code units.
+In languages that use [UTF-16 encoding](https://en.wikipedia.org/wiki/UTF-16) for strings (JavaScript, JVM languages like Java, .NET
+languages like C#...), if the code point of a character is larger than `0xFFFF`, it will be treated as two code units.
 
 For example:
 
 The code point of the emoji `🙉` (`U+1F649`, *Hear-No-Evil Monkey*) is `0x1F649`.
 
-```javascript
-'🙉'.length; // 2
-```
-
 ```java
 "🙉".length(); // 2
 ```
 
-```csharp
-"🙉".Length; // 2
-```
-
 Write a function that returns the *real* length of a string.
 
 ```
 "abcd" --> 4
 "🙉" --> 1
 "😸🦌🚀" --> 3
-```
+```

kata/7-kyu/get-the-length-of-a-string/main/Kata.java

@@ -0,0 +1,5 @@
+interface Kata {
+  static int getRealLength(String str) {
+    return str.codePointCount(0, str.length());
+  }
+}

kata/7-kyu/get-the-length-of-a-string/test/SolutionTest.java

@@ -0,0 +1,21 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+class SolutionTest {
+  @ParameterizedTest
+  @CsvSource(textBlock = """
+      '', 0
+      abcd, 4
+      中国, 2
+      𝓪𝓫𝓬𝓭, 4
+      𨭎𩷶, 2
+      😸🦌🚀, 3
+      ↓→↑←, 4
+      '\nabc\ndef\n', 9
+      """)
+  void sample(String str, int expected) {
+    assertEquals(expected, Kata.getRealLength(str));
+  }
+}