Tests, Research Instruments, Measures, Surveys, and Questionnaires are ways to measure a patient or research subject's physical or mental state, behavior, risk, or outcome of an intervention.
Tests are proprietary, meaning that they are typically not freely available to the public. Access to the full-text of tests can be found in subscription databases, books, or on publishers websites for a fee. Often, you may contact the author for use in an education or research setting.
If you are looking for a specific test, they you cannot find a review of, try search for the name of the test in Google Scholar and or PsycINFO to find the article it was originally published in. That article will give you all the information about the development of the test.
Some measures are proprietary and require purchase. These kinds of materials should be a last resort when a good alternative cannot be found.