diff --git a/tests/day02exercise.test.js b/tests/day02exercise.test.js
new file mode 100644
index 0000000..d5dde68
--- /dev/null
+++ b/tests/day02exercise.test.js
@@ -0,0 +1,57 @@
+const exercise02 = require('../02_Day_Data_types/day02exercise')
+describe("Test Day 02 Exercise - Level 1", ()=>{
+    it("Declare a variable named challenge and assign it to an initial value '30 Days Of JavaScript'",()=>{
+        console.log(exercise02.challenge);
+        expect(exercise02.challenge).toBe("30 Days Of JavaScript")
+    })
+    
+    it.todo("Print the string on the browser console using console.log()")
+    
+    it.todo("Print the length of the string on the browser console using console.log()")
+    it('Change all the string characters to capital letters using toUpperCase() method', ()=>{
+        expect(exercise02.exec04).toBe("30 DAYS OF JAVASCRIPT")
+    })
+    it("Change all the string characters to lowercase letters using toLowerCase() method",()=>{
+        expect(exercise02.exec05).toBe("30 days of javascript")
+    })
+    it("Cut (slice) out the first word of the string using substr() or substring() method", ()=>{
+        expect(exercise02.exec06).toBe('30')
+    })
+    it("Slice out the phrase Days Of JavaScript from 30 Days Of JavaScript.",()=>{
+        expect(exercise02.exec07).toBe('Days Of JavaScript')
+    })
+
+    it("Check if the string contains a word Script using includes() method", ()=>{
+        expect(exercise02.exec08).toBe(true)
+    })
+    it("Split the string into an array using split() method", ()=>{
+        const result = exercise02.exec09 instanceof Array
+        expect(result).toBe(true)
+    })
+    it("Split the string 30 Days Of JavaScript at the space using split() method", ()=>{
+        expect(exercise02.exec10).toEqual([ '30', 'Days', 'Of', 'JavaScript' ])
+    })
+    it("'Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon' split the string at the comma and change it to an array.", ()=>{
+        expect(exercise02.exec11).toEqual([ 'Facebook',
+        ' Google',
+        ' Microsoft',
+        ' Apple',
+        ' IBM',
+        ' Oracle',
+        ' Amazon' ])
+    })
+    // Change 30 Days Of JavaScript to 30 Days Of Python using replace() method.
+    // What is character at index 15 in '30 Days Of JavaScript' string? Use charAt() method.
+    // What is the character code of J in '30 Days Of JavaScript' string using charCodeAt()
+    // Use indexOf to determine the position of the first occurrence of a in 30 Days Of JavaScript
+    // Use lastIndexOf to determine the position of the last occurrence of a in 30 Days Of JavaScript.
+    // Use indexOf to find the position of the first occurrence of the word because in the following sentence:'You cannot end a sentence with because because because is a conjunction'
+    // Use lastIndexOf to find the position of the last occurrence of the word because in the following sentence:'You cannot end a sentence with because because because is a conjunction'
+    // Use search to find the position of the first occurrence of the word because in the following sentence:'You cannot end a sentence with because because because is a conjunction'
+    // Use trim() to remove any trailing whitespace at the beginning and the end of a string.E.g ' 30 Days Of JavaScript '.
+    // Use startsWith() method with the string 30 Days Of JavaScript and make the result true
+    // Use endsWith() method with the string 30 Days Of JavaScript and make the result true
+    // Use match() method to find all the a’s in 30 Days Of JavaScript
+    // Use concat() and merge '30 Days of' and 'JavaScript' to a single string, '30 Days Of JavaScript'
+    // Use repeat() method to print 30 Days Of JavaScript 2 times
+})