How to test a laser diode ?

Purchased from eBay Blue Laser Diode 1.6w blue beam 1600mW 445nm M140 A-TYPE UK 450NM . But it is not burning. Tried with 1.2 A – there is blue light coming from the laser, it focuses on some points, but nothing, it gets hot. Tried 2 types of lenses, see attachments.
Any way to test if the laser is ok ?

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