Determining the coverage of a test suite
Richard C. Waters · ACM SIGPLAN Lisp Pointers · 1991
The value of a suite of test cases depends critically on its coverage. Ideally a suite should test every facet of the specification for a program and every facet of the algorithms used to implement the specification. Unfortunately, there is no practical way to be sure that complete coverage has been achieved. However, something should be done to assess the coverage of a test suite, because a test suite with poor coverage has little value.