I try use MOCHA test. Need remove dublicate words in array. It my test. I got errors "TypeError: a.filter is not a function
at removeDuplicateWords (test.js:3:14)
at Context. (test.js:16:24)
at processImmediate (internal/timers.js:461:21)"
my test:
function removeDuplicateWords(a=[]){
let arr2= a.filter((item, index)=>a.indexOf(item) == index )
return arr2
}
////
const assert = require("chai").assert;
describe("Basic tests", () => {
it("Testing for fixed tests", () => {
assert.strictEqual(removeDuplicateWords('alpha beta beta gamma gamma gamma delta alpha beta beta gamma gamma gamma delta'), 'alpha beta gamma delta');
});
});