lookup.test.js

const createLookup = require("./lookup.js");

test("creates a country currency code lookup for multiple codes", () => {
  expect(
    createLookup([
      ["US", "USD"],
      ["CA", "CAD"],
    ])
  ).toEqual({
    US: "USD",
    CA: "CAD",
  });
  expect(
    createLookup([
      ["BE", "EUR"],
      ["BR", "BRL"],
      ["FI", "FIN"],
    ])
  ).toEqual({ BE: "EUR", BR: "BRL", FI: "FIN" });
  expect(
    createLookup([
      ["CV", "CPV"],
      ["CN", "CHN"],
      ["CR", "CRI"],
      ["DE", "DEU"],
      ["IN", "IND"],
    ])
  ).toEqual({ CV: "CPV", CN: "CHN", CR: "CRI", DE: "DEU", IN: "IND" });
});

/*

Create a lookup object of key value pairs from an array of code pairs

Acceptance Criteria:

Given
 - An array of arrays representing country code and currency code pairs
   e.g. [['US', 'USD'], ['CA', 'CAD']]

When
 - createLookup function is called with the country-currency array as an argument

Then
 - It should return an object where:
 - The keys are the country codes
 - The values are the corresponding currency codes

Example
Given: [['US', 'USD'], ['CA', 'CAD']]

When
createLookup(countryCurrencyPairs) is called

Then
It should return:
 {
   'US': 'USD',
   'CA': 'CAD'
 }
*/