what is test coverage?

Answer Posted / s srinivas reddy

A measure of the proportion of a program exercised by a test
suite, usually expressed as a percentage. This will
typically involve collecting information about which parts
of a program are actually executed when running the test
suite in order to identify which branches of conditional
statements which have been taken.

The most basic level of test coverage is code coverage
testing and the most methodical is path coverage testing.
Some intermediate levels of test coverage exist, but are
rarely used.

The standard Unix tool for measuring test coverage is tcov,
which annotates C or Fortran source with the results of a
test coverage analysis. GCT is a GNU equivalent.

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