-// check/paranoia_check.cpp
-
-/* This set of tests checks for some of GiNaC's oopses which showed up during
- * development. Things were evaluated wrongly and so. It should not find such
- * a sick behaviour again. But since we are paranoic and we want to exclude
- * that behaviour for good... */
-
-#include <GiNaC/ginac.h>
+/** @file paranoia_check.cpp
+ *
+ * This set of tests checks for some of GiNaC's oopses which showed up during
+ * development. Things were evaluated wrongly and so. Such a sick behaviour
+ * shouldn't occur any more. But we are paranoic and we want to exclude these
+ * these oopses for good, so we run those stupid tests... */
+
+/*
+ * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "ginac.h"
+
+#ifndef NO_NAMESPACE_GINAC
+using namespace GiNaC;
+#endif // ndef NO_NAMESPACE_GINAC
// The very first pair of historic problems had its roots in power.cpp and was
-// finally resolved on April 27th. (Fixing the first on April 23rd actually
-// introduced the second.)
+// finally resolved on April 27th 1999. (Fixing the first on April 23rd
+// actually introduced the second.)
static unsigned paranoia_check1(void)
{
unsigned result = 0;
g = e / f;
// In the first one expand did not do any job at all:
- if ( !g.expand().is_equal(x) ) {
+ if (!g.expand().is_equal(x)) {
clog << "e = x*y*z; f = y*z; expand(e/f) erroneously returned "
<< g.expand() << endl;
++result;
g = f - e*y;
// After .expand(), g should be zero:
- if (!g.expand().is_equal(exZERO())) {
+ if (!g.expand().is_zero()) {
clog << "e = (x + z*x); f = e*y; expand(f - e*y) erroneously returned "
<< g.expand() << endl;
++result;
}
// After .eval(), g should be zero:
- if (!g.eval().is_equal(exZERO())) {
+ if (!g.eval().is_zero()) {
clog << "e = (x + z*x); f = e*y; eval(f - e*y) erroneously returned "
<< g.eval() << endl;
++result;
}
- // This actually worked already back in April. But we are very paranoic!
- if (!g.expand().eval().is_equal(exZERO())) {
+ // This actually worked already back in April 1999. But we are very paranoic!
+ if (!g.expand().eval().is_zero()) {
clog << "e = (x + z*x); f = e*y; eval(expand(f - e*y)) erroneously returned "
<< g.expand().eval() << endl;
++result;
return result;
}
-// The third bug was introduced on May 18, discovered on May 19 and fixed that
-// same day. It worked when x was substituted by 1 but not with other numbers:
+// The third bug was introduced on May 18th 1999, discovered on May 19 and
+// fixed that same day. It worked when x was substituted by 1 but not with
+// other numbers:
static unsigned paranoia_check3(void)
{
unsigned result = 0;
return result;
}
-// The fourth bug was also discovered on May 19 and fixed immediately:
+// The fourth bug was also discovered on May 19th 1999 and fixed immediately:
static unsigned paranoia_check4(void)
{
unsigned result = 0;
f = pow(x, 2) + x + 1;
g = e - f;
- if (!g.is_equal(exZERO())) {
+ if (!g.is_zero()) {
clog << "e = pow(x,2) + x + 1; f = pow(x,2) + x + 1; g = e-f; g erroneously returned "
<< g << endl;
++result;
}
- if (!g.is_equal(exZERO())) {
+ if (!g.is_zero()) {
clog << "e = pow(x,2) + x + 1; f = pow(x,2) + x + 1; g = e-f; g.eval() erroneously returned "
<< g.eval() << endl;
++result;
return result;
}
-// The fifth oops was discovered on May 20 and fixed a day later:
+// The fifth oops was discovered on May 20th 1999 and fixed a day later:
static unsigned paranoia_check5(void)
{
unsigned result = 0;
e = pow(x*y + 1, 2);
f = pow(x, 2) * pow(y, 2) + 2*x*y + 1;
- if (!(e-f).expand().is_equal(exZERO())) {
+ if (!(e-f).expand().is_zero()) {
clog << "e = pow(x*y+1,2); f = pow(x,2)*pow(y,2) + 2*x*y + 1; (e-f).expand() erroneously returned "
<< (e-f).expand() << endl;
++result;
return result;
}
-// This one was discovered on Jun 1 and fixed the same day:
+// This one was discovered on Jun 1st 1999 and fixed the same day:
static unsigned paranoia_check6(void)
{
unsigned result = 0;
return result;
}
-// This one was introduced on June 1 by some aggressive manual optimization.
-// Discovered and fixed on June 2.
+// This one was introduced on June 1st 1999 by some aggressive manual
+// optimization. Discovered and fixed on June 2nd.
static unsigned paranoia_check7(void)
{
unsigned result = 0;
}
// This one was a result of the rewrite of mul::max_coefficient when we
-// introduced the overall_coefficient field in expairseq objects on Oct 1.
-// Fixed on Oct 4.
+// introduced the overall_coefficient field in expairseq objects on Oct 1st
+// 1999. Fixed on Oct 4th.
static unsigned paranoia_check8(void)
{
unsigned result = 0;
return result;
}
+// This one was a result of a modification to frac_cancel() & Co. to avoid
+// expanding the numerator and denominator when bringing them from Q[X] to
+// Z[X]. multiply_lcm() forgot to multiply the x-linear term with the LCM of
+// the coefficient's denominators (2 in this case). Introduced on Jan 25th
+// 2000 and fixed on Jan 31th.
+static unsigned paranoia_check9(void)
+{
+ unsigned result = 0;
+ symbol x("x");
+
+ ex e = (exp(-x)-2*x*exp(-x)+pow(x,2)/2*exp(-x))/exp(-x);
+ ex f = e.normal();
+
+ if (!f.is_equal(1-2*x+pow(x,2)/2)) {
+ clog << "normal(" << e << ") returns " << f << " instead of 1-2*x+1/2*x^2\n";
+ ++result;
+ }
+ return result;
+}
+
unsigned paranoia_check(void)
{
unsigned result = 0;
result += paranoia_check6();
result += paranoia_check7();
result += paranoia_check8();
+ result += paranoia_check9();
- if (! result) {
+ if (!result) {
cout << " passed ";
clog << "(no output)" << endl;
} else {
git://www.ginac.de / ginac.git / blobdiff