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+Running the tests
+-----------------
+
+- All tests reside in the tests/ directory tree.
+
+- Running the tests is as simple as:
+ $ ctest
+
+- Alternatively, the test scripts can be run directly:
+ $ cd tests
+ $ ./run_format_tests.py
+
+- To run the only the tests associated with language X ("cpp", "java", etc.):
+ $ cd tests
+ $ ./run_format_tests.py X
+
+Adding new tests
+----------------
+
+- A test is defined by adding a line in one of the tests/*.test
+ files: you must pick the .test file for the proper programming
+ language, i.e. pick the X.test file which defines tests which use
+ inputs in language X.
+
+- A test has a (unique) number (a.k.a. test name) -- it does not have
+ to be a sequential number, but it might be handy to treat it like
+ that.
+
+- The X.test entry (line) has this format:
+
+ <test.name> <config.file> <input.file>
+
+ where the fields are separated by an arbitrary non-zero amount of
+ whitespace.
+
+- As each test references a config file and an input file (the latter
+ written in programming language X), these are assumed to exist in
+ the paths tests/config/<config.file> and tests/<input.file>
+ respectively. It is _strongly_ advised to put input files in their
+ own subdirectory, so a 'C' source formatting test entry might look
+ like this (in 'c.test'):
+
+ 99902 ger-full-cmt-reflow.cfg c/cmt-not-a-boxed-cmt.c
+
+ where 'ger-full-cmt-reflow.cfg' is stored at
+ tests/config/ger-full-cmt-reflow.cfg and 'c/cmt-not-a-boxed-cmt.c'
+ will be fetched from tests/c/cmt-not-a-boxed-cmt.c when you run
+ the tests.
+
+
+Features
+--------
+
+- You can re-use config files and input files for multiple tests. So
+ one might observe test sets like these:
+
+ # clark's style - blank lines before and after flow control,
+ indented comments:
+
+ 20100 clark.cfg c/i2c-core.c
+ 20101 clark.cfg c/comment-indent.c
+ 20102 clark.cfg c/indent.cpp
+ 20103 clark.cfg c/output.cpp
+
+ and
+
+ 21051 return-1.cfg c/nl_return_expr.c
+ 21052 return-2.cfg c/nl_return_expr.c
+ 21053 return-3.cfg c/nl_return_expr.c
+ 21054 return-4.cfg c/nl_return_expr.c
+
+- Reference output files (the reference against which the uncrustify
+ test run output is compared) are to be stored in the path
+ tests/expected/<X>/<NNN-TTTTT.TTT> where <X> is the 'language
+ directory' part of the input file, e.g. 'c' for input file
+ 'c/nl_return_expr.c', <NNN> is the test name (number), e.g. '21051',
+ and <TTTTT.TTT> is the file name part of the input test filespec,
+ e.g. 'nl_return_expr.c' for input file spec 'c/nl_return_expr.c'.
+
+ This means that for test
+
+ 21051 return-1.cfg c/nl_return_expr.c
+
+ the accompanying reference output is:
+
+ tests/expected/c/21051-nl_return_expr.c
+
+- When starting out with a new test, you don't need to have a
+ 'reference output' yet: the test will simply be reported as a
+ 'fail'ed test until you do.
+
+- Tip: the easiest way to produce 'reference output' is to copy the
+ test output (from tests/results/...etc... ) to
+ tests/expected/...etc... once you've ascertained that those tests
+ produce the desired (correct) output. The helper script
+ tests/fixtest.sh will copy the results file to the output folder:
+
+ $ fixtest.sh 30014 00110 # copy tests 30014 and 00110
+
+- Tip: the helper script tests/difftest.sh runs 'diff' on the result
+ and output versions to point out what changed.
+
+- Tip: There are also a few options to run_format_tests.py that can
+ help. Most interesting is '-d' will run 'diff' if the test fails.
+
+- Tip: If some errors occur with Windows, set the macro variable
+ NO_MACRO_VARARG to 1 to test some more pointer under Linux.