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In this directory, various tests on R are run automatically. This is the recommended way to check if R has been built successfully on your architecture. make test-All does both of make test-Examples and make test-Specific the first of which runs all the examples from the help files (*.Rd) of all core packages (base, eda, ..., ts) -- which can take quite long (a few minutes, depending on your environment). The "fast" part of the tests is `test-Specific' which runs the *.R files in this (./tests) directory (tolerantly) compares the result *.Rout file with the prespecified *.Rout.save (if that exists). It also runs a test abusing all the functions via no-segfault.R, and that can be quite slow (a minute or more). There are other useful make targets: make test-undoc make test-codoc run undoc() and codoc() on base and all the standard packages. make test-Reg runs regression tests, that is tests that ensure that things which have been changed (perhaps as a result of bug reports) stay fixed. make test-Random runs a series of tests on the distribution of random variates generated by the rxxxx() functions. The test is a large deviation bound on the Kolmogorov statistic, so also provides a test of the cumulative distribution functions pxxxx(). Because rare events do happen, this test suite will be failed in about 1 in 50 runs. make test-Gct runs a subset of the specific tests with gctorture turned on. This is slow, taking an hour or two. Martin Maechler for the R Core Team.