Interesting. But, why would he have to test us? He doesn’t know us?
That God tests us is taught in the Tanakh. For example:
‘You shall remember all the way which the LORD your God has led you in the wilderness these forty years, that He might humble you, testing you, to know what was in your heart, whether you would keep His commandments or not.’ (Deut 8:2); ‘Examine me, O LORD, and try me; test my mind and my heart.’ (Psalm 26:2); ‘I, the LORD, search the heart, I test the mind, even to give to each man according to his ways, according to the results of his deeds.’ Jeremiah 17:10); ‘Behold, I have refined you, but not as silver; I have tested you in the furnace of affliction.’ (Isaiah 48:10).
And also in the New Testament. For example:
‘But just as we have been approved by God to be entrusted with the gospel, so we speak, not to please man, but to please God who tests our hearts.’ (1 Thess 2:4); ‘Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, knowing that the testing of your faith produces endurance.’ (James 1:2-3); ‘Blessed is the man who remains steadfast under trial, for when he has stood the test he will receive the crown of life, which God has promised to those who love him.’ (James 1:12); ‘In this you rejoice, though now for a little while, if necessary, you have been grieved by various trials, so that the tested genuineness of your faith – more precious than gold that perishes though it is tested by fire – may be found to result in praise and glory and honor at the revelation of Jesus Christ.’ (1 Peter 1:6-7); ‘For you know that the testing of your faith produces steadfastness. And let steadfastness have its full effect, that you may be perfect and complete, lacking in nothing.’ (James 1:3-4)
Being tested is not about God knowing us (of course He does) it is about us knowing ourselves; knowing our strengths and weakness; so that we can build on the former and eliminate – as far as possible – the latter. In short, we need to be tested (to be challenged, or to challenge ourselves) in order to develop as human beings; in order to become that which we are meant to be.