Testing of a person's faith can be found throughout the Bible. Though, there is a purpose behind this. God is testing us to build our faith. Much like a plant is pruned so that it can grow deeper and mature. Testing leads to a “complete” relationship with God.
A spiritual reward is another benefit. Quoted from James 1:12, "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."
Testing can be viewed as a way of purifying the soul. It helps to remove impurities and strengthen your faith in God. "For you, O God, have tested us; you have tried us as silver is tried." - Psalm 66:10.
A perfect example in the Old Testament is that of Job who faithfully stood for God even though he lost everything: his children, home, business, and disregarding both his wife and friends who advised him wrongfully. He responded, "The LORD gave, and the LORD has taken away; blessed be the name of the LORD" (Job 1:21). The Bible teaches, "In all this Job did not sin with his lips" (Job 2:10).
Jesus serves as the best example who remained vigilant with his faith in God. In the New Testament, he resisted the temptations Satan put before him, three times. He prayed the night before his death, endured wrongful trials, suffering, and painful death on the cross. He committed no sin and faithfully accomplished his Father’s will and plan for His life.
We are to expect trying times and our faith is to be tested. These tests are designed to mature our faith and serve as an example to others.