A person cannot try the word of God until he himself is tried by the word of God. God makes promises. We receive them but we are tried by them when we obey them by faith. Following is an example. If one remembers God had said he was going to raise up a great nation through the son of Abraham and Sarah. They were past child bearing years when the miracle occurred and Isaac was born. A few years later God told Abraham to offer Isaac as a sacrifice in spite of the fact that he knew the promise of God through this son. Could it be accomplished if he obeyed God. The human answer is no but God was trying Abraham and God knew what he would do. Abraham did not.
So, there was a double trial going on when Abraham offered Isaac and this is what is said about him.
Heb 11:17 By faith Abraham, when he was tried, offered up Isaac: and he that had received the promises offered up his only begotten son,
18 Of whom it was said, That in Isaac shall thy seed be called:
19 Accounting that God was able to raise him up, even from the dead; from whence also he received him in a figure.
Psa 105:17 He sent a man before them, even Joseph, who was sold for a servant:
18 Whose feet they hurt with fetters: he was laid in iron:
19 Until the time that his word came: the word of the Lord tried him.
20 The king sent and loosed him; even the ruler of the people, and let him go free.
Here is a psalm with the exact same time frame as Psa 12.
Psa 66:8 O bless our God, ye people, (Israel remnant) and make the voice of his praise to be heard:
9 Which holdeth our soul in life, and suffereth not our feet to be moved.
10 For thou, O God, hast proved us: thou hast tried us, as silver is tried. (we know it is seven times from Psalm 12 and the Revelation)
11 Thou broughtest us into the net; thou laidst affliction upon our loins.
12 Thou hast caused men to ride over our heads; we went through fire and through water: but thou broughtest us out into a wealthy place.
13 I will go into thy house with burnt offerings: I will pay thee my vows,
14 Which my lips have uttered, and my mouth hath spoken, when I was in trouble.
2 Sam 22:31 As for God, his way is perfect; the word of the Lord is tried: he is a buckler to all them that trust in him.
Psalm 12 is in the context of the above.