How to use the chai.assert.ok function in chai

it("Should return if table is idle or not", function () {
        assert.ok(table.idle());

        var streams = new Map([["key", "value"]]);
        table.streams(streams);
        assert.notOk(table.idle());
        table.streams(new Map());

        table._pollCursor = 1;
        assert.notOk(table.idle());
        table._pollCursor = null;

        table._migrateCursor = 1;
        assert.notOk(table.idle());
        table._migrateCursor = null;
      });

it('should get the value by column name or index', function () {
      const columns = [{name: 'first', type: { code: dataTypes.varchar}}, {name: 'second', type: { code: dataTypes.varchar}}];
      const row = new types.Row(columns);
      row['first'] = 'hello';
      row['second'] = 'world';
      assert.ok(row.get, 'It should contain a get method');
      assert.strictEqual(row['first'], 'hello');
      assert.strictEqual(row.get('first'), row['first']);
      assert.strictEqual(row.get(0), row['first']);
      assert.strictEqual(row.get('second'), row['second']);
      assert.strictEqual(row.get(1), row['second']);
    });
    it('should enumerate only columns defined', function () {

it("should be a function", () => {
    assert.ok(reducer);
    assert.isFunction(reducer);
  });

it('Doesn\'t show any errors initially', () => {
      assert.ok(checkbox.props().isValid());
      assert.equal(wrapper.find('.error-label').length, 0);
    });

client.compare(password, hash, function (err, success) {
      if (err) return done(err);
      assert.ok(success);
      done();
    });
  });

}, {}).then(function (result) {
        assert.equal(typeof result, 'object', 'result is object')
        assert.notEqual(result, null, 'result is not null')
        assert.equal(Object.keys(result).length, 13, 'result has 13 properties')
        assert.ok(result.time > time, 'result.time seems correct')
        assert.equal(result.device_id, 'mock device id', 'result.device_id is correct')
        assert.equal(result.flow_id, 'mock flow id', 'result.flow_id is correct')
        assert.ok(result.flow_time > 0, 'result.flow_time is greater than zero')
        assert.ok(result.flow_time < time, 'result.flow_time is less than the current time')
        assert.equal(result.flowBeginTime, time, 'result.flowBeginTime is correct')
        assert.equal(result.flowCompleteSignal, 'mock flow complete signal', 'result.flowCompleteSignal is correct')
        assert.equal(result.flowType, 'mock flow type', 'result.flowType is correct')
        assert.equal(result.service, 'mock service', 'result.service is correct')
        assert.equal(result.utm_campaign, 'mock utm_campaign', 'result.utm_campaign is correct')
        assert.equal(result.utm_content, 'mock utm_content', 'result.utm_content is correct')
        assert.equal(result.utm_medium, 'mock utm_medium', 'result.utm_medium is correct')
        assert.equal(result.utm_source, 'mock utm_source', 'result.utm_source is correct')
        assert.equal(result.utm_term, 'mock utm_term', 'result.utm_term is correct')

        assert.equal(cache.get.callCount, 0, 'cache.get was not called')
        assert.equal(log.error.callCount, 0, 'log.error was not called')
      })
    }

const gasLimit = '21000'
                const gasCost = new BigNumber(gasLimit).times(EXAMPLE_GAS_PRICE)

                assert.equal(options.to, EXAMPLE_TARGET_ADDRESS)
                assert.equal(options.value, balanceAsBigNumber.minus(gasCost))
                assert.equal(options.gas, gasLimit)
                assert.equal(options.gasPrice, EXAMPLE_GAS_PRICE)
                assert.equal(options.data, '')

                return Promise.resolve(EXAMPLE_TX_HASH)
            }
        };

        await drainWallet({}, EXAMPLE_GAS_PRICE, EXAMPLE_TARGET_ADDRESS, wallet, util)

        assert.ok(getBalanceCalled, 'util.getBalance() has to be called')
        assert.ok(sendFromIndexCalled, 'wallet.sendFromIndex() has to be called')
        assert.ok(waitForTransactionToBeMinedCalled, 'util.waitForTransactionToBeMined() has to be called')
    })
})

app.on('respond', function(jovo) {
                let response = jovo.getPlatform().getResponse();
                assert.ok(response.isEmptyResponse());
                done();
            });

it('renders a div', () => {
    const wrapper = shallowWithContext(
      
    );
    assert.ok(wrapper.is('div'));
  });

test('Validation styles', () => {
        fixture.componentInstance.form.get('two').markAsTouched();
        fixture.componentInstance.form.get('three').markAsTouched();
        fixture.detectChanges();
        assert.ok(
            fixture.nativeElement.querySelector('form-field:nth-of-type(2)>form-field-errors'),
            'Displays errors inline when "inline" errorStyle is used.'
        );
        assert.ok(
            fixture.nativeElement.querySelector('form-field:nth-of-type(3) .input-overlay form-field-errors'),
            'Displays errors in overlay when "icon" errorStyle is used.'
        );
    });
    test('Validation message display conditions', () => {