diff --git a/Conversions/UpperCaseConversion.js b/Conversions/UpperCaseConversion.js
index d3a033815..fb5e810a6 100644
--- a/Conversions/UpperCaseConversion.js
+++ b/Conversions/UpperCaseConversion.js
@@ -1,26 +1,26 @@
 /*
-    Explanation :- a user gives a String (it can be incomplete lower or
-        partial lower) and then the program would convert it into a
-        complete(all characters in upper case) upper case string. The
-        logic we have used in the following program is: All the lower case
-        characters (a-z) has ASCII value ranging from 97 to 122 and their
-        corresponding upper case characters (A-Z) have ASCII values 32
+    Explanation :- A user gives a string (it can be incomplete lowercase or
+        partially in lowercase) and then the program converts it into a
+        completely (all characters in uppercase) uppercase string. The
+        logic we have used in the following program is: All the lowercase
+        characters (a-z) has [ASCII](https://en.wikipedia.org/wiki/ASCII) value ranging from 97 to 122 and their
+        corresponding uppercase characters (A-Z) have ASCII values 32
         lesser than them. For example ‘a‘ has an ASCII value of 97
         and ‘A‘ has an ASCII value of 65 (97 - 32). The same applies to other
         characters.
 */
 
 /**
- * UpperCaseConversion takes any case-style string and converts it to the upper case-style string.
- * @param {String} inputString any case style string
- * @returns {String} upper case string
+ * upperCaseConversion takes any case-style string and converts it to the uppercase-style string.
+ * @param {string} inputString Any case style string
+ * @returns {string} Uppercase string
  */
-const UpperCaseConversion = (inputString) => {
+const upperCaseConversion = (inputString) => {
   // Take a string and split it into characters.
   const newString = inputString.split('').map(char => {
     // Get a character code by the use charCodeAt method.
     const presentCharCode = char.charCodeAt()
-    // If the character code lies between 97 to 122 it means they are in the lower case so convert it.
+    // If the character code lies between 97 to 122, it means they are in the lowercase so convert it.
     if (presentCharCode >= 97 && presentCharCode <= 122) {
       // Convert the case by use of the above explanation.
       return String.fromCharCode(presentCharCode - 32)
@@ -32,4 +32,4 @@ const UpperCaseConversion = (inputString) => {
   return newString.join('')
 }
 
-module.exports = UpperCaseConversion
+export { upperCaseConversion }
diff --git a/Conversions/test/UpperCaseConverstion.test.js b/Conversions/test/UpperCaseConverstion.test.js
new file mode 100644
index 000000000..a78ec5b9c
--- /dev/null
+++ b/Conversions/test/UpperCaseConverstion.test.js
@@ -0,0 +1,43 @@
+import { upperCaseConversion } from '../UpperCaseConversion'
+
+describe(('Test the upperCaseConversion function'), () => {
+  it('should return an empty string when the input is an empty string', () => {
+    expect(upperCaseConversion('')).toEqual('')
+  })
+
+  it('should return an all-uppercase string when input is an all-uppercase string', () => {
+    expect(upperCaseConversion('ALLUPPERCASE')).toEqual('ALLUPPERCASE')
+  })
+
+  it('should return an all-uppercase string when input is an all-uppercase string with spaces', () => {
+    expect(upperCaseConversion('ALL UPPERCASE')).toEqual('ALL UPPERCASE')
+  })
+
+  it('should return an all-uppercase string when input is an all-uppercase string with punctuation', () => {
+    expect(upperCaseConversion('ALL UPPER-CASE!')).toEqual('ALL UPPER-CASE!')
+  })
+
+  it('should return an all-uppercase string when input is an all-lowercase string', () => {
+    expect(upperCaseConversion('lowercaseinput')).toEqual('LOWERCASEINPUT')
+  })
+
+  it('should return an all-uppercase string when input is an all-lowercase string with spaces', () => {
+    expect(upperCaseConversion('lowercase input')).toEqual('LOWERCASE INPUT')
+  })
+
+  it('should return an all-uppercase string when input is an all-lowercase string with punctuation', () => {
+    expect(upperCaseConversion('lower-case, input.')).toEqual('LOWER-CASE, INPUT.')
+  })
+
+  it('should return an all-uppercase string when input is an mixed-case string', () => {
+    expect(upperCaseConversion('mixeDCaSeINPuT')).toEqual('MIXEDCASEINPUT')
+  })
+
+  it('should return an all-uppercase string when input is an mixed-case string with spaces', () => {
+    expect(upperCaseConversion('mixeD CaSe INPuT')).toEqual('MIXED CASE INPUT')
+  })
+
+  it('should return an all-uppercase string when input is an mixed-case string with punctuation', () => {
+    expect(upperCaseConversion('mixeD-CaSe INPuT!')).toEqual('MIXED-CASE INPUT!')
+  })
+})