X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;ds=sidebyside;f=octave_packages%2Fm%2Ftestfun%2Ftest.m;fp=octave_packages%2Fm%2Ftestfun%2Ftest.m;h=b22e31eef6147c458b43e5a5ae7915e7e5f84a00;hb=1c0469ada9531828709108a4882a751d2816994a;hp=0000000000000000000000000000000000000000;hpb=63de9f36673d49121015e3695f2c336ea92bc278;p=CreaPhase.git
diff --git a/octave_packages/m/testfun/test.m b/octave_packages/m/testfun/test.m
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+## Copyright (C) 2005-2012 Paul Kienzle
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING. If not, see
+## .
+
+## -*- texinfo -*-
+## @deftypefn {Command} {} test @var{name}
+## @deftypefnx {Command} {} test @var{name} quiet|normal|verbose
+## @deftypefnx {Function File} {} test ('@var{name}', 'quiet|normal|verbose', @var{fid})
+## @deftypefnx {Function File} {} test ([], 'explain', @var{fid})
+## @deftypefnx {Function File} {@var{success} =} test (@dots{})
+## @deftypefnx {Function File} {[@var{n}, @var{max}] =} test (@dots{})
+## @deftypefnx {Function File} {[@var{code}, @var{idx}] =} test ('@var{name}', 'grabdemo')
+##
+## Perform tests from the first file in the loadpath matching @var{name}.
+## @code{test} can be called as a command or as a function. Called with
+## a single argument @var{name}, the tests are run interactively and stop
+## after the first error is encountered.
+##
+## With a second argument the tests which are performed and the amount of
+## output is selected.
+##
+## @table @asis
+## @item 'quiet'
+## Don't report all the tests as they happen, just the errors.
+##
+## @item 'normal'
+## Report all tests as they happen, but don't do tests which require
+## user interaction.
+##
+## @item 'verbose'
+## Do tests which require user interaction.
+## @end table
+##
+## The argument @var{fid} can be used to allow batch processing. Errors
+## can be written to the already open file defined by @var{fid}, and
+## hopefully when Octave crashes this file will tell you what was happening
+## when it did. You can use @code{stdout} if you want to see the results as
+## they happen. You can also give a file name rather than an @var{fid}, in
+## which case the contents of the file will be replaced with the log from
+## the current test.
+##
+## Called with a single output argument @var{success}, @code{test} returns
+## true if all of the tests were successful. Called with two output arguments
+## @var{n} and @var{max}, the number of successful tests and the total number
+## of tests in the file @var{name} are returned.
+##
+## If the second argument is the string 'grabdemo', the contents of the demo
+## blocks are extracted but not executed. Code for all code blocks is
+## concatenated and returned as @var{code} with @var{idx} being a vector of
+## positions of the ends of the demo blocks.
+##
+## If the second argument is 'explain', then @var{name} is ignored and an
+## explanation of the line markers used is written to the file @var{fid}.
+## @seealso{assert, fail, error, demo, example}
+## @end deftypefn
+
+## FIXME: * Consider using keyword fail rather then error? This allows us
+## to make a functional form of error blocks, which means we
+## can include them in test sections which means that we can use
+## octave flow control for both kinds of tests.
+
+function [__ret1, __ret2, __ret3, __ret4] = test (__name, __flag, __fid)
+ ## Information from test will be introduced by "key".
+ persistent __signal_fail = "!!!!! ";
+ persistent __signal_empty = "????? ";
+ persistent __signal_block = " ***** ";
+ persistent __signal_file = ">>>>> ";
+ persistent __signal_skip = "----- ";
+
+ __xfail = 0;
+ __xskip = 0;
+
+ if (nargin < 2 || isempty (__flag))
+ __flag = "quiet";
+ endif
+ if (nargin < 3)
+ __fid = [];
+ endif
+ if (nargin < 1 || nargin > 3
+ || (! ischar (__name) && ! isempty (__name)) || ! ischar (__flag))
+ print_usage ();
+ endif
+ if (isempty (__name) && (nargin != 3 || ! strcmp (__flag, "explain")))
+ print_usage ();
+ endif
+ __batch = (! isempty (__fid));
+
+ ## Decide if error messages should be collected.
+ __close_fid = 0;
+ if (__batch)
+ if (ischar (__fid))
+ __fid = fopen (__fid, "wt");
+ if (__fid < 0)
+ error ("test: could not open log file");
+ endif
+ __close_fid = 1;
+ endif
+ fprintf (__fid, "%sprocessing %s\n", __signal_file, __name);
+ fflush (__fid);
+ else
+ __fid = stdout;
+ endif
+
+ if (strcmp (__flag, "normal"))
+ __grabdemo = 0;
+ __rundemo = 0;
+ __verbose = __batch;
+ elseif (strcmp (__flag, "quiet"))
+ __grabdemo = 0;
+ __rundemo = 0;
+ __verbose = 0;
+ elseif (strcmp (__flag, "verbose"))
+ __grabdemo = 0;
+ __rundemo = 1;
+ __verbose = 1;
+ elseif (strcmp (__flag, "grabdemo"))
+ __grabdemo = 1;
+ __rundemo = 0;
+ __verbose = 0;
+ __demo_code = "";
+ __demo_idx = [];
+ elseif (strcmp (__flag, "explain"))
+ fprintf (__fid, "# %s new test file\n", __signal_file);
+ fprintf (__fid, "# %s no tests in file\n", __signal_empty);
+ fprintf (__fid, "# %s test had an unexpected result\n", __signal_fail);
+ fprintf (__fid, "# %s code for the test\n", __signal_block);
+ fprintf (__fid, "# Search for the unexpected results in the file\n");
+ fprintf (__fid, "# then page back to find the file name which caused it.\n");
+ fprintf (__fid, "# The result may be an unexpected failure (in which\n");
+ fprintf (__fid, "# case an error will be reported) or an unexpected\n");
+ fprintf (__fid, "# success (in which case no error will be reported).\n");
+ fflush (__fid);
+ if (__close_fid)
+ fclose(__fid);
+ endif
+ return;
+ else
+ error ("test: unknown flag '%s'", __flag);
+ endif
+
+ ## Locate the file to test.
+ __file = file_in_loadpath (__name, "all");
+ if (isempty (__file))
+ __file = file_in_loadpath (cstrcat (__name, ".m"), "all");
+ endif
+ if (isempty (__file))
+ __file = file_in_loadpath (cstrcat (__name, ".cc"), "all");
+ endif
+ if (iscell (__file))
+ ## If repeats, return first in path.
+ if (isempty (__file))
+ __file = "";
+ else
+ __file = __file{1};
+ endif
+ endif
+ if (isempty (__file))
+ if (__grabdemo)
+ __ret1 = "";
+ __ret2 = [];
+ else
+ if (exist (__name) == 3)
+ fprintf (__fid, "%s%s source code with tests for dynamically linked function not found\n", __signal_empty, __name);
+ else
+ fprintf (__fid, "%s%s does not exist in path\n", __signal_empty, __name);
+ endif
+ fflush (__fid);
+ if (nargout > 0)
+ __ret1 = __ret2 = 0;
+ endif
+ endif
+ if (__close_fid)
+ fclose(__fid);
+ endif
+ return;
+ endif
+
+ ## Grab the test code from the file.
+ __body = __extract_test_code (__file);
+
+ if (isempty (__body))
+ if (__grabdemo)
+ __ret1 = "";
+ __ret2 = [];
+ else
+ fprintf (__fid, "%s%s has no tests available\n", __signal_empty, __file);
+ fflush (__fid);
+ if (nargout > 0)
+ __ret1 = __ret2 = 0;
+ endif
+ endif
+ if (__close_fid)
+ fclose(__fid);
+ endif
+ return;
+ else
+ ## Add a dummy comment block to the end for ease of indexing.
+ if (__body (length(__body)) == "\n")
+ __body = sprintf ("\n%s#", __body);
+ else
+ __body = sprintf ("\n%s\n#", __body);
+ endif
+ endif
+
+ ## Chop it up into blocks for evaluation.
+ __lineidx = find (__body == "\n");
+ __blockidx = __lineidx(find (! isspace (__body(__lineidx+1))))+1;
+
+ ## Ready to start tests ... if in batch mode, tell us what is happening.
+ if (__verbose)
+ disp (cstrcat (__signal_file, __file));
+ endif
+
+ ## Assume all tests will pass.
+ __all_success = 1;
+
+ ## Process each block separately, initially with no shared variables.
+ __tests = __successes = 0;
+ __shared = " ";
+ __shared_r = " ";
+ __clear = "";
+ for __i = 1:length(__blockidx)-1
+
+ ## Extract the block.
+ __block = __body(__blockidx(__i):__blockidx(__i+1)-2);
+
+ ## Let the user/logfile know what is happening.
+ if (__verbose)
+ fprintf (__fid, "%s%s\n", __signal_block, __block);
+ fflush (__fid);
+ endif
+
+ ## Split __block into __type and __code.
+ __idx = find (! isletter (__block));
+ if (isempty (__idx))
+ __type = __block;
+ __code = "";
+ else
+ __type = __block(1:__idx(1)-1);
+ __code = __block(__idx(1):length(__block));
+ endif
+
+ ## Assume the block will succeed.
+ __success = 1;
+ __msg = [];
+
+### DEMO
+
+ ## If in __grabdemo mode, then don't process any other block type.
+ ## So that the other block types don't have to worry about
+ ## this __grabdemo mode, the demo block processor grabs all block
+ ## types and skips those which aren't demo blocks.
+
+ __isdemo = strcmp (__type, "demo");
+ if (__grabdemo || __isdemo)
+ __istest = 0;
+
+ if (__grabdemo && __isdemo)
+ if (isempty(__demo_code))
+ __demo_code = __code;
+ __demo_idx = [1, length(__demo_code)+1];
+ else
+ __demo_code = cstrcat(__demo_code, __code);
+ __demo_idx = [__demo_idx, length(__demo_code)+1];
+ endif
+
+ elseif (__rundemo && __isdemo)
+ try
+ ## process the code in an environment without variables
+ eval (sprintf ("function __test__()\n%s\nendfunction", __code));
+ __test__;
+ input ("Press to continue: ", "s");
+ catch
+ __success = 0;
+ __msg = sprintf ("%sdemo failed\n%s", __signal_fail, lasterr ());
+ end_try_catch
+ clear __test__;
+
+ endif
+ ## Code already processed.
+ __code = "";
+
+### SHARED
+
+ elseif (strcmp (__type, "shared"))
+ __istest = 0;
+
+ ## Separate initialization code from variables.
+ __idx = find (__code == "\n");
+ if (isempty (__idx))
+ __vars = __code;
+ __code = "";
+ else
+ __vars = __code (1:__idx(1)-1);
+ __code = __code (__idx(1):length(__code));
+ endif
+
+ ## Strip comments off the variables.
+ __idx = find (__vars == "%" | __vars == "#");
+ if (! isempty (__idx))
+ __vars = __vars(1:__idx(1)-1);
+ endif
+
+ ## Assign default values to variables.
+ try
+ __vars = deblank (__vars);
+ if (! isempty (__vars))
+ eval (cstrcat (strrep (__vars, ",", "=[];"), "=[];"));
+ __shared = __vars;
+ __shared_r = cstrcat ("[ ", __vars, "] = ");
+ else
+ __shared = " ";
+ __shared_r = " ";
+ endif
+ catch
+ ## Couldn't declare, so don't initialize.
+ __code = "";
+ __success = 0;
+ __msg = sprintf ("%sshared variable initialization failed\n",
+ __signal_fail);
+ end_try_catch
+
+ ## Clear shared function definitions.
+ eval (__clear, "");
+ __clear = "";
+
+ ## Initialization code will be evaluated below.
+
+### FUNCTION
+
+ elseif (strcmp (__type, "function"))
+ __istest = 0;
+ persistent __fn = 0;
+ __name_position = function_name (__block);
+ if (isempty (__name_position))
+ __success = 0;
+ __msg = sprintf ("%stest failed: missing function name\n",
+ __signal_fail);
+ else
+ __name = __block(__name_position(1):__name_position(2));
+ __code = __block;
+ try
+ eval(__code); ## Define the function
+ __clear = sprintf ("%sclear %s;\n", __clear, __name);
+ catch
+ __success = 0;
+ __msg = sprintf ("%stest failed: syntax error\n%s",
+ __signal_fail, lasterr ());
+ end_try_catch
+ endif
+ __code = "";
+
+### ENDFUNCTION
+
+ elseif (strcmp (__type, "endfunction"))
+ ## endfunction simply declares the end of a previous function block.
+ ## There is no processing to be done here, just skip to next block.
+ __istest = 0;
+ __code = "";
+
+### ASSERT/FAIL
+
+ elseif (strcmp (__type, "assert") || strcmp (__type, "fail"))
+ __istest = 1;
+ ## Put the keyword back on the code.
+ __code = __block;
+ ## The code will be evaluated below as a test block.
+
+### ERROR/WARNING
+
+ elseif (strcmp (__type, "error") || strcmp(__type, "warning"))
+ __istest = 1;
+ __warning = strcmp (__type, "warning");
+ [__pattern, __id, __code] = getpattern (__code);
+ if (__id)
+ __patstr = ["id=",__id];
+ else
+ __patstr = ["<",__pattern,">"];
+ endif
+ try
+ eval (sprintf ("function __test__(%s)\n%s\nendfunction",
+ __shared, __code));
+ catch
+ __success = 0;
+ __msg = sprintf ("%stest failed: syntax error\n%s",
+ __signal_fail, lasterr ());
+ end_try_catch
+
+ if (__success)
+ __success = 0;
+ __warnstate = warning ("query", "quiet");
+ warning ("on", "quiet");
+ try
+ eval (sprintf ("__test__(%s);", __shared));
+ if (! __warning)
+ __msg = sprintf ("%sexpected %s but got no error\n",
+ __signal_fail, __patstr);
+ else
+ if (! isempty (__id))
+ [~, __err] = lastwarn;
+ __mismatch = ! strcmp (__err, __id);
+ else
+ __err = trimerr (lastwarn, "warning");
+ __mismatch = isempty (regexp (__err, __pattern, "once"));
+ endif
+ warning (__warnstate.state, "quiet");
+ if (isempty (__err))
+ __msg = sprintf ("%sexpected %s but got no warning\n",
+ __signal_fail, __patstr);
+ elseif (__mismatch)
+ __msg = sprintf ("%sexpected %s but got %s\n",
+ __signal_fail, __patstr, __err);
+ else
+ __success = 1;
+ endif
+ endif
+
+ catch
+ if (! isempty (__id))
+ [~, __err] = lasterr;
+ __mismatch = ! strcmp (__err, __id);
+ else
+ __err = trimerr (lasterr, "error");
+ __mismatch = isempty (regexp (__err, __pattern, "once"));
+ endif
+ warning (__warnstate.state, "quiet");
+ if (__warning)
+ __msg = sprintf ("%sexpected warning %s but got error %s\n",
+ __signal_fail, __patstr, __err);
+ elseif (__mismatch)
+ __msg = sprintf ("%sexpected %s but got %s\n",
+ __signal_fail, __patstr, __err);
+ else
+ __success = 1;
+ endif
+ end_try_catch
+ clear __test__;
+ endif
+ ## Code already processed.
+ __code = "";
+
+### TESTIF
+
+ elseif (strcmp (__type, "testif"))
+ __e = regexp (__code, '.$', 'lineanchors', 'once');
+ ## Strip comment any comment from testif line before looking for features
+ __feat_line = strtok (__code(1:__e), '#%');
+ __feat = regexp (__feat_line, '\w+', 'match');
+ __have_feat = strfind (octave_config_info ("DEFS"), __feat);
+ if (any (cellfun ("isempty", __have_feat)))
+ __xskip++;
+ __istest = 0;
+ __code = ""; # Skip the code.
+ __msg = sprintf ("%sskipped test\n", __signal_skip);
+ else
+ __istest = 1;
+ __code = __code(__e + 1 : end);
+ endif
+
+### TEST
+
+ elseif (strcmp (__type, "test") || strcmp (__type, "xtest"))
+ __istest = 1;
+ ## Code will be evaluated below.
+
+### Comment block.
+
+ elseif (strcmp (__block(1:1), "#"))
+ __istest = 0;
+ __code = ""; # skip the code
+
+### Unknown block.
+
+ else
+ __istest = 1;
+ __success = 0;
+ __msg = sprintf ("%sunknown test type!\n", __signal_fail);
+ __code = ""; # skip the code
+ endif
+
+ ## evaluate code for test, shared, and assert.
+ if (! isempty(__code))
+ try
+ ## FIXME: need to check for embedded test functions, which cause
+ ## segfaults, until issues with subfunctions in functions are resolved.
+ embed_func = regexp (__code, '^\s*function ', 'once', 'lineanchors');
+ if (isempty (embed_func))
+ eval (sprintf ("function %s__test__(%s)\n%s\nendfunction",
+ __shared_r,__shared, __code));
+ eval (sprintf ("%s__test__(%s);", __shared_r, __shared));
+ else
+ error (["Functions embedded in %!test blocks are not allowed.\n", ...
+ "Use the %!function/%!endfunction syntax instead to define shared functions for testing.\n"]);
+ endif
+ catch
+ if (strcmp (__type, "xtest"))
+ __msg = sprintf ("%sknown failure\n%s", __signal_fail, lasterr ());
+ __xfail++;
+ else
+ __msg = sprintf ("%stest failed\n%s", __signal_fail, lasterr ());
+ __success = 0;
+ endif
+ if (isempty (lasterr ()))
+ error ("empty error text, probably Ctrl-C --- aborting");
+ endif
+ end_try_catch
+ clear __test__;
+ endif
+
+ ## All done. Remember if we were successful and print any messages.
+ if (! isempty (__msg))
+ ## Make sure the user knows what caused the error.
+ if (! __verbose)
+ fprintf (__fid, "%s%s\n", __signal_block, __block);
+ fflush (__fid);
+ endif
+ fputs (__fid, __msg);
+ fputs (__fid, "\n");
+ fflush (__fid);
+ ## Show the variable context.
+ if (! strcmp (__type, "error") && ! strcmp (__type, "testif")
+ && ! all (__shared == " "))
+ fputs (__fid, "shared variables ");
+ eval (sprintf ("fdisp(__fid,bundle(%s));", __shared));
+ fflush (__fid);
+ endif
+ endif
+ if (__success == 0)
+ __all_success = 0;
+ ## Stop after one error if not in batch mode.
+ if (! __batch)
+ if (nargout > 0)
+ __ret1 = __ret2 = 0;
+ endif
+ if (__close_fid)
+ fclose(__fid);
+ endif
+ return;
+ endif
+ endif
+ __tests += __istest;
+ __successes += __success * __istest;
+ endfor
+ eval (__clear, "");
+
+ if (nargout == 0)
+ if (__tests || __xfail || __xskip)
+ if (__xfail)
+ printf ("PASSES %d out of %d tests (%d expected failures)\n",
+ __successes, __tests, __xfail);
+ else
+ printf ("PASSES %d out of %d tests\n", __successes, __tests);
+ endif
+ if (__xskip)
+ printf ("Skipped %d tests due to missing features\n", __xskip);
+ endif
+ else
+ printf ("%s%s has no tests available\n", __signal_empty, __file);
+ endif
+ elseif (__grabdemo)
+ __ret1 = __demo_code;
+ __ret2 = __demo_idx;
+ elseif (nargout == 1)
+ __ret1 = __all_success;
+ else
+ __ret1 = __successes;
+ __ret2 = __tests;
+ __ret3 = __xfail;
+ __ret4 = __xskip;
+ endif
+endfunction
+
+## Create structure with fieldnames the name of the input variables.
+function s = varstruct (varargin)
+ for i = 1:nargin
+ s.(deblank (argn(i,:))) = varargin{i};
+ endfor
+endfunction
+
+## Find [start,end] of fn in 'function [a,b] = fn'.
+function pos = function_name (def)
+ pos = [];
+
+ ## Find the end of the name.
+ right = find (def == "(", 1);
+ if (isempty (right))
+ return;
+ endif
+ right = find (def(1:right-1) != " ", 1, "last");
+
+ ## Find the beginning of the name.
+ left = max ([find(def(1:right)==" ", 1, "last"), ...
+ find(def(1:right)=="=", 1, "last")]);
+ if (isempty (left))
+ return;
+ endif
+ left++;
+
+ ## Return the end points of the name.
+ pos = [left, right];
+endfunction
+
+## Strip from ' code'.
+## Also handles 'id=ID code'
+function [pattern, id, rest] = getpattern (str)
+ pattern = ".";
+ id = [];
+ rest = str;
+ str = trimleft (str);
+ if (! isempty (str) && str(1) == "<")
+ close = index (str, ">");
+ if (close)
+ pattern = str(2:close-1);
+ rest = str(close+1:end);
+ endif
+ elseif (strncmp (str, "id=", 3))
+ [id, rest] = strtok (str(4:end));
+ endif
+endfunction
+
+## Strip '.*prefix:' from '.*prefix: msg\n' and strip trailing blanks.
+function msg = trimerr (msg, prefix)
+ idx = index (msg, cstrcat (prefix, ":"));
+ if (idx > 0)
+ msg(1:idx+length(prefix)) = [];
+ endif
+ msg = trimleft (deblank (msg));
+endfunction
+
+## Strip leading blanks from string.
+function str = trimleft (str)
+ idx = find (isspace (str));
+ leading = find (idx == 1:length(idx));
+ if (! isempty (leading))
+ str = str(leading(end)+1:end);
+ endif
+endfunction
+
+## Make a structure out of the named variables
+## (based on Etienne Grossmann's tar function).
+function s = bundle (varargin)
+ for i = 1:nargin
+ s.(deblank (argn(i,:))) = varargin{i};
+ endfor
+endfunction
+
+function body = __extract_test_code (nm)
+ fid = fopen (nm, "rt");
+ body = [];
+ if (fid >= 0)
+ while (! feof (fid))
+ ln = fgetl (fid);
+ if (length (ln) >= 2 && strcmp (ln(1:2), "%!"))
+ body = [body, "\n"];
+ if (length(ln) > 2)
+ body = cstrcat (body, ln(3:end));
+ endif
+ endif
+ endwhile
+ fclose (fid);
+ endif
+endfunction
+
+### Test for test for missing features
+%!testif OCTAVE_SOURCE
+%! ## This test should be run
+%! assert (true);
+
+### Disable this test to avoid spurious skipped test for "make check"
+% !testif HAVE_FOOBAR
+% ! ## missing feature. Fail if this test is run
+% ! error("Failed missing feature test");
+
+### Test for a known failure
+%!xtest error("This test is known to fail")
+
+### example from toeplitz
+%!shared msg1,msg2
+%! msg1="C must be a vector";
+%! msg2="C and R must be vectors";
+%!fail ('toeplitz([])', msg1);
+%!fail ('toeplitz([1,2;3,4])', msg1);
+%!fail ('toeplitz([1,2],[])', msg2);
+%!fail ('toeplitz([1,2],[1,2;3,4])', msg2);
+%!fail ('toeplitz ([1,2;3,4],[1,2])', msg2);
+% !fail ('toeplitz','usage: toeplitz'); # usage doesn't generate an error
+% !fail ('toeplitz(1, 2, 3)', 'usage: toeplitz');
+%!test assert (toeplitz ([1,2,3], [1,4]), [1,4; 2,1; 3,2]);
+%!demo toeplitz ([1,2,3,4],[1,5,6])
+
+### example from kron
+%!#error kron # FIXME suppress these until we can handle output
+%!#error kron(1,2,3)
+%!test assert (isempty (kron ([], rand(3, 4))))
+%!test assert (isempty (kron (rand (3, 4), [])))
+%!test assert (isempty (kron ([], [])))
+%!shared A, B
+%!test
+%! A = [1, 2, 3; 4, 5, 6];
+%! B = [1, -1; 2, -2];
+%!assert (size (kron (zeros (3, 0), A)), [ 3*rows(A), 0 ])
+%!assert (size (kron (zeros (0, 3), A)), [ 0, 3*columns(A) ])
+%!assert (size (kron (A, zeros (3, 0))), [ 3*rows(A), 0 ])
+%!assert (size (kron (A, zeros (0, 3))), [ 0, 3*columns(A) ])
+%!assert (kron (pi, e), pi*e)
+%!assert (kron (pi, A), pi*A)
+%!assert (kron (A, e), e*A)
+%!assert (kron ([1, 2, 3], A), [ A, 2*A, 3*A ])
+%!assert (kron ([1; 2; 3], A), [ A; 2*A; 3*A ])
+%!assert (kron ([1, 2; 3, 4], A), [ A, 2*A; 3*A, 4*A ])
+%!test
+%! res = [1,-1,2,-2,3,-3; 2,-2,4,-4,6,-6; 4,-4,5,-5,6,-6; 8,-8,10,-10,12,-12];
+%! assert (kron (A, B), res)
+
+### an extended demo from specgram
+%!#demo
+%! ## Speech spectrogram
+%! [x, Fs] = auload(file_in_loadpath("sample.wav")); # audio file
+%! step = fix(5*Fs/1000); # one spectral slice every 5 ms
+%! window = fix(40*Fs/1000); # 40 ms data window
+%! fftn = 2^nextpow2(window); # next highest power of 2
+%! [S, f, t] = specgram(x, fftn, Fs, window, window-step);
+%! S = abs(S(2:fftn*4000/Fs,:)); # magnitude in range 0 test("test", 'bogus'); # incorrect args, generates error()
+%!error garbage # usage on nonexistent function should be
+
+%!error test("test", 'bogus'); # test without pattern
+
+%!test
+%! lastwarn(); # clear last warning just in case
+
+%!warning warning('warning message');
+
+%!## test of shared variables
+%!shared a # create a shared variable
+%!test a=3; # assign to a shared variable
+%!test assert(a,3) # variable should equal 3
+%!shared b,c # replace shared variables
+%!test assert (!exist("a")); # a no longer exists
+%!test assert (isempty(b)); # variables start off empty
+%!shared a,b,c # recreate a shared variable
+%!test assert (isempty(a)); # value is empty even if it had a previous value
+%!test a=1; b=2; c=3; # give values to all variables
+%!test assert ([a,b,c],[1,2,3]); # test all of them together
+%!test c=6; # update a value
+%!test assert([a, b, c],[1, 2, 6]); # show that the update sticks
+%!shared # clear all shared variables
+%!test assert(!exist("a")) # show that they are cleared
+%!shared a,b,c # support for initializer shorthand
+%! a=1; b=2; c=4;
+
+%!function x = __test_a(y)
+%! x = 2*y;
+%!endfunction
+%!assert(__test_a(2),4); # Test a test function
+
+%!function __test_a (y)
+%! x = 2*y;
+%!endfunction
+%!test
+%! __test_a(2); # Test a test function with no return value
+
+%!function [x,z] = __test_a (y)
+%! x = 2*y;
+%! z = 3*y;
+%!endfunction
+%!test # Test a test function with multiple returns
+%! [x,z] = __test_a(3);
+%! assert(x,6);
+%! assert(z,9);
+
+%!## test of assert block
+%!assert (isempty([])) # support for test assert shorthand
+
+%!## demo blocks
+%!demo # multiline demo block
+%! t=[0:0.01:2*pi]; x=sin(t);
+%! plot(t,x);
+%! % you should now see a sine wave in your figure window
+%!demo a=3 # single line demo blocks work too
+
+%!## this is a comment block. it can contain anything.
+%!##
+%! it is the "#" as the block type that makes it a comment
+%! and it stays as a comment even through continuation lines
+%! which means that it works well with commenting out whole tests
+
+% !# failure tests. All the following should fail. These tests should
+% !# be disabled unless you are developing test() since users don't
+% !# like to be presented with expected failures. I use % ! to disable.
+% !test error("---------Failure tests. Use test('test','verbose',1)");
+% !test assert([a,b,c],[1,3,6]); # variables have wrong values
+% !bogus # unknown block type
+% !error toeplitz([1,2,3]); # correct usage
+% !test syntax errors) # syntax errors fail properly
+% !shared garbage in # variables must be comma separated
+% !error syntax++error # error test fails on syntax errors
+% !error "succeeds."; # error test fails if code succeeds
+% !error error("message") # error pattern must match
+% !demo with syntax error # syntax errors in demo fail properly
+% !shared a,b,c
+% !demo # shared variables not available in demo
+% ! assert(exist("a"))
+% !error
+% ! test('/etc/passwd');
+% ! test("nonexistent file");
+% ! ## These don't signal an error, so the test for an error fails. Note
+% ! ## that the call doesn't reference the current fid (it is unavailable),
+% ! ## so of course the informational message is not printed in the log.