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Sparse test suite
~~~~~~~~~~~~~~~~~
Sparse has a number of test cases in its validation directory. The test-suite
script aims at making automated checking of these tests possible. It works by
embedding tags in C comments in the test cases.
check-name: <name>
Name of the test. This is the only mandatory tag.
check-description: <description ...>
A description of what the test checks.
check-command: <command arg ...>
There are different kinds of tests. Some can validate the sparse
preprocessor, while others will use sparse, cgcc, or even other backends
of the library. check-command allows you to give a custom command to
run the test-case.
The '$file' string is special. It will be expanded to the file name at
run time.
It defaults to "sparse $file".
check-arch-ignore: <arch[|...]>
check-arch-only: <arch[|...]>
Ignore the test if the current architecture (as returned by 'uname -m')
match or not one of the archs given in the pattern.
check-exit-value: <value>
The expected exit value of check-command. It defaults to 0.
check-timeout: <timeout>
The maximum expected duration of check-command, in seconds.
It defaults to 1.
check-output-start / check-output-end
The expected output (stdout and stderr) of check-command lies between
those two tags. It defaults to no output.
check-output-ignore / check-error-ignore
Don't check the expected output (stdout or stderr) of check-command
(useful when this output is not comparable or if you're only interested
in the exit value).
By default this check is done.
check-known-to-fail
Mark the test as being known to fail.
check-output-contains: <pattern>
Check that the output (stdout) contains the given pattern.
Several such tags can be given, in which case the output
must contains all the patterns.
check-output-excludes: <pattern>
Similar than the above one, but with opposite logic.
Check that the output (stdout) doesn't contain the given pattern.
Several such tags can be given, in which case the output
must contains none of the patterns.
check-output-pattern(<nbr>): <pattern>
check-output-pattern(<min>,<max>): <pattern>
Similar to the contains/excludes above, but with full control
of the number of times the pattern should occur in the output.
If <min> or <max> is '-' the corresponding check is ignored.
Using test-suite
~~~~~~~~~~~~~~~~
The test-suite script is called through the check target of the Makefile. It
will try to check every test case it finds (find validation -name '*.c').
It can be called to check a single test with:
$ cd validation
$ ./test-suite single preprocessor/preprocessor1.c
TEST Preprocessor #1 (preprocessor/preprocessor1.c)
preprocessor/preprocessor1.c passed !
Writing a test
~~~~~~~~~~~~~~
test-suite comes with a format command to make a test easier to write:
test-suite format file [name [cmd]]
name:
check-name value. If no name is provided, it defaults to the file name.
cmd:
check-command value. If no cmd is provided, it defaults to
"sparse $file".
The output of the test-suite format command can be redirected into the
test case to create a test-suite formatted file.
$ ./test-suite format bad-assignment.c Assignment >> bad-assignment.c
$ cat !$
cat bad-assignment.c
/*
* check-name: bad assignment
*
* check-command: sparse $file
* check-exit-value: 1
*
* check-output-start
bad-assignment.c:3:6: error: Expected ; at end of statement
bad-assignment.c:3:6: error: got \
* check-output-end
*/
You can define the check-command you want to use for the test. $file will be
extended to the file name at run time.
$ ./test-suite format validation/preprocessor2.c "Preprocessor #2" \
"sparse -E \$file" >> validation/preprocessor2.c
$ cat !$
cat validation/preprocessor2.c
/*
* This one we happen to get right.
*
* It should result in a simple
*
* a + b
*
* for a proper preprocessor.
*/
#define TWO a, b
#define UNARY(x) BINARY(x)
#define BINARY(x, y) x + y
UNARY(TWO)
/*
* check-name: Preprocessor #2
*
* check-command: sparse -E $file
* check-exit-value: 0
*
* check-output-start
a + b
* check-output-end
*/
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