diff --git a/app.js b/app.js
new file mode 100644
index 00000000..89337b42
--- /dev/null
+++ b/app.js
@@ -0,0 +1,16 @@
+const fromEuroToDollar = function(valueInEuro) {
+    let valueInDollar = valueInEuro * 1.07;
+    return valueInDollar;
+}
+
+const fromDollarToYen = function(valueInDollar) {
+    let valueInYen = valueInDollar * 149.03;
+    return valueInYen;
+}
+
+const fromYenToPound = function(valueInYen) {
+    let valueInPound = valueInYen * 0.0072;
+    return valueInPound; 
+}
+
+module.exports = { fromEuroToDollar, fromDollarToYen, fromYenToPound };
\ No newline at end of file
diff --git a/test.js b/test.js
new file mode 100644
index 00000000..8eaca9d6
--- /dev/null
+++ b/test.js
@@ -0,0 +1,17 @@
+test("One euro should be 1.07 dollars", function() {
+    // Import the function from app.js
+    const { fromEuroToDollar } = require('./app.js');
+    expect(fromEuroToDollar(3.5)).toBe(3.745);
+})
+
+test("Conversion from USD to JPY (1 USD = 149.03 JPY)", function() {
+    // Import the function from app.js
+    const { fromDollarToYen } = require('./app.js')
+    expect(fromDollarToYen(10)).toBe(1490.3);
+})
+
+test("Conversion from JPY to GBP (1 JPY = 0.0072 GBP)", function() {
+    // Import the function from app.js
+    const { fromYenToPound } = require('./app.js')
+    expect(fromYenToPound(1000)).toBe(7.2);
+})