Testing Environment is nothing but the combination of 
equipment(System Configuration and different 
machines),technologies(Operating System,Application 
Servers,webservers,Databases,etc....We have to test our 
application on client specified Testenvironment.

Testing Environment and Testing Process is different.Your 
question is not clear.Anyway I let you know what is Testing 
Process.

Generally Testing Process start with the review of 
requirements and as follows.
1.TestPlan Preparation
2.Test Plan Review
3.Testcase Preparation
4.Testcases review
5.Testcase execution
6.Defect Logging
7.Regression Testing
8.User Acceptence Testing(Generallu can be done by the 
client,but sometimes Testing Team can be done)