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@node Utilities for Testing Code
@chapter Utilities for Testing Code
The module @code{(hnh test util)} contains a number of general
utilities which I have only found useful when running tests.
@defun µs x
Multiply @var{x} by @math{10^6}, transforming seconds into
micro seconds.
@end defun
@defun transform-time-of-day tod
Merges the pair returned by @code{gettimeofday} into one large
integer, measured in microseconds.
@example
(transform-time-of-day (gettimeofday))
⇒ 1697460136217839
@end example
@end defun
@defun green str
@defunx red str
@defunx yellow str
@defunx bold str
Wrap the give string in ANSI escape sequences.
@c TODO should be replaced by a general system.
@end defun
@defun make-indent depth
Returns a string conisting of 2 × @var{depth} spaces.
@end defun
@defun string-replace-head s1 s2
Return a new string, which contains @code{s2 ++ s1[len(s2):]}.
@end defun
@defun diff a b
Return a line diff between object @var{a} and @var{b}. If both objects
are strings then they will be passed directoly to the line diff
function, but if either is a non-string then they will both first be
passed through @code{pretty-print} in write mode (instead of display mode).
Currently the diff command used is
@example
git diff --no-index --color-moved=default --color=always a b
@end example
@end defun
@section xmllint
The module @code{(hnh test xmllint)} provides a wrapper around the
xmllint program.
@defun xmllint str
Run xmllint on @var{str}, returning the result as a new string.
@end defun
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