Unit test failing

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1

why isn’t this passing?

describe("Tests", function () {

const MyContract = artifacts.require("./SimpleStorage.sol")
contract("MyContract", accounts => {
        it("should set and get the same value",  () =>
        let value = 88
        return  MyContract.deployed().then(function(instance){
        instance.set(value, {from:accounts[0]})})
        .then(() => instance.get()).then((r) => {
        assert.equal(value,r.toNumber());
        }));
      }
  )

})
2

Mark this solved by referring to the Truffle documentation. therefore rewritten as

var assert = require('chai').assert
require("babel-register");

const SimpleStorage = artifacts.require("SimpleStorage");
contract("contract test", accounts => {

         it("sets value equal to expected value", async () => {
           let val = 88
           let instance = await SimpleStorage.deployed()
           await instance.set(val)
           await instance.get().then((r) => {
           assert.equal(val,r.toNumber());
         })
      })  
    });
 })
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