Below is some info about infertility mandate in texas. It doesn't say anything about infertility testing however, and talks only about IVF. Its best to call your insurance company and see if its covered. Some states require insurance to cover IF and some dont.
1987
Tex. Insurance Code Ann. Section 3.51-6, Sec. 3A
Definition of Infertility/Patient Requirements
* Requires group insurers to offer coverage of IVF. Employers may choose whether or not to include infertility coverage as part of their employee health benefit package
* If an employer chooses to offer the benefit, patients must meet the following: the patient for the IVF procedure is the policyholder or spouse of the policyholder; the patients eggs must be fertilized with her spouses sperm; the patient and the patients spouse have a history of infertility of at least five continuous years or associated with endometriosis, DES, blockage of or surgical removal of one or both fallopian tubes or oligospermia; the patient has been unable to attain a pregnancy through less costly treatment covered under their policy; the IVF procedures must be performed at medical facilities that conform to ACOG and ASRM guidelines
Coverage
* No coverage is required. Insurers are only required to offer IVF
Exceptions
* Does not require religious employers to cover infertility treatment
* Employers who self-insure are exempt from the requirements of the law