West Midlands | ITP-MAY25 | Saleh Yousef | Module-Data-Groups | Sprint-2

Sprint-2/interpret/invert.js

@@ -10,20 +10,34 @@ function invert(obj) {
   const invertedObj = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    invertedObj.key = value;
+    invertedObj[value] = key;
   }
 
-  return invertedObj;
+  return invertedObj;  
 }
 
 // a) What is the current return value when invert is called with { a : 1 }
-
+{1 : a}
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
-
+{1: a, 2: b}
 // c) What is the target return value when invert is called with {a : 1, b: 2}
-
+{1 : a, 2 : b}
 // c) What does Object.entries return? Why is it needed in this program?
-
+// Object.entries returns an array of key-value pairs from the object. It is needed to iterate over both keys and values in the object.
 // d) Explain why the current return value is different from the target output
-
+// The current return value is incorrect because the code is assigning the value to the key instead of the key to the value in the inverted object.
 // e) Fix the implementation of invert (and write tests to prove it's fixed!)
+
+test("invert swaps keys and values in an object", () => {
+  const currentOutput = invert({ x: 10, y: 20 });
+  const targetOutput = { "10": "x", "20": "y" };
+
+  expect(currentOutput).toEqual(targetOutput);
+});
+
+test("invert handles multiple key-value pairs", () => {
+  const currentOutput = invert({ a: 1, b: 2, c: 3 });
+  const targetOutput = { "1": "a", "2": "b", "3": "c" };
+
+  expect(currentOutput).toEqual(targetOutput);
+});