add industry user model test
create template for industry user model test
add valid test to assign_student
add a test case to assign_student
add more test cases to assign_student
add unique testing for assign_student model
add tests fot company model
add another test fot company model
add valid test for message model
update valid test for assign_student model
add more presence tests to for company model
add presence tests for message model
add more presence tests for message model
create template tests file for project  model
add valid test file for project model
add presence tests file for project model
add attachment file type tests for project model
add more attachment file type tests for project model
add some invalid file type tests for project model
add more invalid file type tests for project model