56 lines
1.7 KiB
Text
56 lines
1.7 KiB
Text
.NH 1
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Testing the program
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.PP
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There is no test-suite for testing
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.I lint.
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I have written a lot of small files that each test one
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particular property of the program.
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At this moment there are about 220 test programs.
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.PP
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It would take a lot of time and effort to run these tests by hand.
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To ease this work I wrote a program that runs these tests
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automatically.
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The test program (the program that runs the tests) needs, associated
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with each .c file, a .w file, containing from each expected warning
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a substring. E.g. when the following warnings should be given by
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.I lint:
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.DS B
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.ft CW
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file t.c, line 3, i evaluation order undefined
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file t.c, line 6, a set but not used in function main
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.R
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.DE
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it is sufficient to write a file \f(CWt.w\fP containing
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.DS B
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.ft CW
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a set but not used in function main
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i evaluation order undefined
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.R
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.DE
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The test program is called with all the .c files to be tested
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as arguments.
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.PP
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Sometimes it is necessary to test
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.I lint
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on two files.
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The test program runs
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.I lint
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on two files when two consecutive
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arguments are of the form \fIname\fPa.c and \fIname\fPb.c.
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It then compares the output of
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.I lint
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with the file \fIname\fP.w.
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.PP
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.I Lint
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is also tested by running it on existing programs.
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.I Lint
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has been run on some \s-2UNIX\s+2 utility programs in
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/usr/src/cmd, on Unipress Emacs (consisting of more than 30,000
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lines of code) and the program itself.
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Bugs have been found in e.g. /usr/src/cmd/cat.c and
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/usr/src/cmd/ld.c.
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To test the robustness of the program, it was run on the
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password file /etc/passwd and on `mixed' C program files.
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These mixed C program files are C program files that were
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broken in chunks and then put together in a different order.
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.bp
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