During the testing phase of aircraft wings, there are lot of testing like temperature, pressure, humidity, vibration and load/stress. Apart from these, does any one have idea which other tests are done on them for complete qualifications like like lightning?
Almost all the tests done on aircraft wings can easily be categorized in one of the areas you mentioned.
The only remaining thing I can think is bending an aircraft's wing. It is stated on BBC as:
Many modern passenger jets can flex their wings nearly 90 degrees in a test rig.
For B787, it is reported:
During the test, the wings on the 787 were flexed upward “approximately 25 feet” which equates to 150 percent of the most extreme forces the airplane is ever expected to encounter during normal operation. The test is used to demonstrate a safety margin for the design and is part of the certification process to show the airplane can withstand extreme forces.
OP asked about tests for lightning effects. Lightning commonly strikes the nose, wingtips, engine cowlings, and tip of the vertical tail. Hence, wings are not the only parts of an airplane which needs to be protected against lightning.
To avoid reinventing the wheel, please see the following questions: