The ornamental design for a testingdevice for electroniccomponent, as shown and described.
FIG. 1 is a top, front, and right side perspective view of a testing device for electronic component showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left-side, elevational view thereof;
FIG. 5 is a right-side, elevational view thereof,
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a top, front, and right-side perspective view, showing the article with a display thereof in a released position and a drawer in a drawn-out position.
(Broken line portions are only included to show the intended use environment and do not constitute a part of the claimed design.)