feat: added applyCase method, it simply checks the given case styles,…

… and calls the appropriate meth

src/index.ts

@@ -467,30 +467,37 @@ export const snakeCase = (text: string, delimiter: string | RegExp = /[-_\s]/):
 };
 
 /**
- * expands the string key and turns it into an object property
+ * applies case based on the case style chosen
+ * @param text text to apply case on
+ * @param caseStyle case style of choice
+ * @param delimiter optional delimiter string or regex
  */
-export const expandProperty = <T extends object>(target: T, key: string, value: any, delimiter: string = '.',
-    caseStyle: number = CASE_STYLES.CAMEL_CASE): T & {[propName: string]: any} => {
-
-    const applyCase = (key) => {
+export const applyCase = (text: string, caseStyle: number,
+    delimiter: string | RegExp = /[-_\s]/): string => {
         switch(caseStyle) {
 
             case CASE_STYLES.CAMEL_CASE:
-                return camelCase(key);
+                return camelCase(text, delimiter);
 
             case CASE_STYLES.SNAKE_CASE:
-                return snakeCase(key);
+                return snakeCase(text, delimiter);
 
             default:
-                return key;
+                return text;
         }
-    };
+};
+
+/**
+ * expands the string key and turns it into an object property
+ */
+export const expandProperty = <T extends object>(target: T, key: string, value: any, delimiter: string = '.',
+    caseStyle: number = CASE_STYLES.CAMEL_CASE): T & {[propName: string]: any} => {
 
     const keys = key.split(delimiter);
-    const lastKey = applyCase(keys.pop());
+    const lastKey = applyCase(keys.pop(), caseStyle);
 
     const lastObject: object = keys.reduce((current, key) => {
-        key = applyCase(key);
+        key = applyCase(key, caseStyle);
         current[key] = makeObject(current[key]);
         return current[key];
     }, target);