add function and tests for lookup

week-2/implement/lookup.js

@@ -1,17 +1,39 @@
-function createLookup() {
-  // implementation here
+function createLookup(arrays) {
+  const countryCurrency = {};
+
+  if (Array.isArray(arrays[0])) {
+    for (const array of arrays) {
+      const [key, value] = array;
+      countryCurrency[key] = value;
+    }
+  } else {
+    const [key, value] = arrays;
+    countryCurrency[key] = value;
+  }
+
+  return countryCurrency;
 }
 
+console.log(createLookup(["KE", "KSH"]));
+console.log(
+  createLookup([
+    ["KE", "KSH"],
+    ["TR", "TRY"],
+  ])
+);
+
+module.exports = createLookup;
+
 /* ======= Test suite is provided below... =====
  */
 
-test("converts a single pair of currency codes", () => {
-  expect(createLookup([["GB", "GBP"]])).toEqual({
-    GB: "GBP",
-  });
-  expect(createLookup([["DE", "EUR"]])).toEqual({
-    DE: "EUR",
-  });
-});
+// test("converts a single pair of currency codes", () => {
+//   expect(createLookup([["GB", "GBP"]])).toEqual({
+//     GB: "GBP",
+//   });
+//   expect(createLookup([["DE", "EUR"]])).toEqual({
+//     DE: "EUR",
+//   });
+// });
 
-test.todo("creates a country currency code lookup for multiple codes");
+// test.todo("creates a country currency code lookup for multiple codes");

week-2/implement/lookup.test.js

@@ -1,3 +1,4 @@
+const createLookup = require("./lookup.js");
 /*
 
 Create a lookup object of key value pairs from an array of code pairs
@@ -29,3 +30,22 @@ It should return:
    'CA': 'CAD'
  }
 */
+test("converts a single pair of currency codes", () => {
+  expect(createLookup([["KE", "KSH"]])).toEqual({
+    KE: "KSH",
+  });
+  expect(createLookup([["DE", "EUR"]])).toEqual({
+    DE: "EUR",
+  });
+});
+
+test("creates a country currency code lookup for multiple codes", () => {
+  expect(createLookup([["GB", "GBP"],["KE", "KSH"]])).toEqual({
+    GB: "GBP",
+    KE: "KSH"
+  });
+  expect(createLookup([["DE", "EUR"],["TR", "TRY"]])).toEqual({
+    DE: "EUR",
+    TR: "TRY"
+  });
+});