added tests

test-projects/web-basic/index.js

@@ -0,0 +1,15 @@
+console.log("Hello, World!");
+
+const calculator = {
+  add: (a, b) => a + b,
+  subtract: (a, b) => a - b,
+  multiply: (a, b) => a * b,
+  divide: (a, b) => {
+    if (b === 0) {
+      throw new Error("Cannot divide by zero");
+    }
+    return a / b;
+  },
+};
+
+module.exports = calculator;