Testing device and testing method

The invention discloses a testing device and a testing method. The testing device is used for testing the wettability and the electrolyte retention capability of a material sample to an electrolyte, wherein the testing device comprises a weighing assembly, a sample fixing assembly, a liquid dropping assembly and a tray assembly; the weighing assembly is used for obtaining the weight information of the material sample and the electrolyte retained on the material sample; the sample fixing assembly comprises a stress clamp, the stress clamp comprises two parallel clamping plates, the clamping plates are perpendicular to a weighing table, and the two clamping plates are used for clamping the material sample; the liquid dropping assembly is positioned above the stress clamp and is used for dropping electrolyte onto the material sample; and the tray assembly comprises a tray, the tray is located below the stress clamp, and the tray is used for containing the electrolyte dripping from the material sample. The stress