Shear testing is usually performed on bolts, rivets etc. to determine the shear strength of a material. Typically shear tests are performed as Single Shear or Double Shear.
Other types of shear tests include the Spot Welded coupons or Adhesive Bonded coupons. These are tested in tension, till the Spot Weld or the Adhesive Bond has completely failed.
The shear data may be reported in the units of force or stress, as may be applicable.