dedupe.test.js

const dedupe = require("./dedupe.js");
/*
Dedupe Array

📖 Dedupe means **deduplicate**

In this kata, you will need to deduplicate the elements of an array

E.g. dedupe(['a','a','a','b','b','c']) target output: ['a','b','c']
E.g. dedupe([5, 1, 1, 2, 3, 2, 5, 8]) target output: [5, 1, 2, 3, 8]
E.g. dedupe([1, 2, 1]) target output: [1, 2]
*/

// Acceptance Criteria:

// Given an empty array
// When passed to the dedupe function
// Then it should return an empty array
test.todo("given an empty array, it returns an empty array");
test("given an empty array, it returns an empty array", ()=>{
    const list = [];
    expect(dedupe(list)).toEqual([]);
});
test
("array with no duplicate should return copy of original", ()=>{
    let list = [1,2,4,6,9,8];
    expect(dedupe(list)).toEqual([1,2,4,6,9,8]);
});
test("shoiuld remove the duplicate value and preserving the first occurebce",()=>{
    expect(dedupe([5, 1, 1, 2, 3, 2, 5, 8])).toEqual([5,1,2,3,8]);
})
// Given an array with no duplicates
// When passed to the dedupe function
// Then it should return a copy of the original array

// Given an array with strings or numbers
// When passed to the dedupe function
// Then it should remove the duplicate values, preserving the first occurence of each element