add CamelPascalToSnakeCase conversion

Author: 0APOCALYPSE0

Conversions/CamelPascalToSnakeCase.js

@@ -5,37 +5,40 @@
  */
 
 function camelPascalToSnakeCase(inputStr) {
-  if (typeof inputStr !== "string") {
-      throw new Error(`Expected string as input, found ${typeof inputStr}`);
+  if (typeof inputStr !== 'string') {
+    throw new Error(`Expected string as input, found ${typeof inputStr}`)
   }
 
-  let snakeStr = "";
-  let lastCharWasLower = false;
+  let snakeStr = ''
+  let lastCharWasLower = false
 
   for (let index = 0; index < inputStr.length; index++) {
-      const char = inputStr[index];
+    const char = inputStr[index]
 
-      if (/[A-Z]/.test(char) && (!lastCharWasLower || (index > 0 && /[a-z0-9]/.test(inputStr[index - 1])))) {
-          if (index > 0 && inputStr[index - 1] !== "_") {
-              snakeStr += "_";
-          }
-          snakeStr += char.toLowerCase();
-          lastCharWasLower = false;
-      } else if (/[a-z0-9]/.test(char)) {
-          snakeStr += char;
-          lastCharWasLower = /[a-z]/.test(char);
-      } else {
-          snakeStr += "_";
-          lastCharWasLower = false;
+    if (
+      /[A-Z]/.test(char) &&
+      (!lastCharWasLower || (index > 0 && /[a-z0-9]/.test(inputStr[index - 1])))
+    ) {
+      if (index > 0 && inputStr[index - 1] !== '_') {
+        snakeStr += '_'
       }
+      snakeStr += char.toLowerCase()
+      lastCharWasLower = false
+    } else if (/[a-z0-9]/.test(char)) {
+      snakeStr += char
+      lastCharWasLower = /[a-z]/.test(char)
+    } else {
+      snakeStr += '_'
+      lastCharWasLower = false
+    }
   }
 
   // Remove leading underscore
-  if (snakeStr[0] === "_") {
-      snakeStr = snakeStr.substring(1);
+  if (snakeStr[0] === '_') {
+    snakeStr = snakeStr.substring(1)
   }
 
-  return snakeStr;
+  return snakeStr
 }
 
 export { camelPascalToSnakeCase }

Conversions/test/CamelPascalToSnakeCase.test.js

@@ -1,4 +1,4 @@
-import { camelPascalToSnakeCase } from "../CamelPascalToSnakeCase";
+import { camelPascalToSnakeCase } from '../CamelPascalToSnakeCase'
 
 describe('camelToSnakeCase', () => {
   it.each([
@@ -7,12 +7,14 @@ describe('camelToSnakeCase', () => {
     ['123someRandom123String123', '123some_random123_string123'],
     ['123SomeRandom123String123', '123_some_random123_string123'],
     ['123SomeRandom123String123', '123_some_random123_string123'],
-    ['', ''],
+    ['', '']
   ])('converts %s to snake_case %s', (input, expected) => {
-    expect(camelPascalToSnakeCase(input)).toBe(expected);
-  });
+    expect(camelPascalToSnakeCase(input)).toBe(expected)
+  })
 
   it('throws an error when the input is not a string', () => {
-    expect(() => camelPascalToSnakeCase(123)).toThrow('Expected string as input');
-  });
-});
+    expect(() => camelPascalToSnakeCase(123)).toThrow(
+      'Expected string as input'
+    )
+  })
+})