Clean up check suite a little bit.

[ginac.git] / check / exam_paranoia.cpp

diff --git a/check/exam_paranoia.cpp b/check/exam_paranoia.cpp
index 7be66fdfd8a9ebdb13bbd37618670ecb9779524a..7977bd2e88f5440990f2c4b389237f726a0cb1f3 100644 (file)
--- a/check/exam_paranoia.cpp
+++ b/check/exam_paranoia.cpp
@@ -1,12 +1,12 @@
 /** @file exam_paranoia.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
+ *  development.  Things were evaluated wrongly and so.  Such a sick behavior
  *  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) 1999-2015 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2020 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
@@ -504,6 +504,17 @@ static unsigned exam_paranoia20()
        return result;
 }
 
+static unsigned exam_mul_info()
+{
+       symbol x("x"), y("y");
+       ex e = x*y;
+       if (!e.info(info_flags::indefinite)) {
+               clog << "eek, product of two symbols is NOT indefinite\n";
+               return 1;
+       }
+       return 0;
+}
+
 static unsigned is_polynomial_false_positive()
 {
        unsigned result = 0;
@@ -577,6 +588,102 @@ static unsigned exam_paranoia23()
        return result;
 }
 
+// Bug in sqrfree_yun (fixed 2016-02-02).
+static unsigned exam_paranoia24()
+{
+       unsigned result = 0;
+       symbol x("x");
+       ex e;
+
+       e = (x-1)*(x+1) - x*x + 1;  // an unexpanded 0...
+       try {
+               ex f = sqrfree(e);
+               if (!f.is_zero()) {
+                       clog << "sqrfree(" << e << ") returns " << f << " instead of 0\n";
+                       ++result;
+               }
+       } catch (const exception &err) {
+               clog << "sqrfree(" << e << ") throws " << err.what() << endl;
+               ++result;
+       }
+
+       e = pow(x-1,3) - expand(pow(x-1,3));  // ...still after differentiating...
+       try {
+               ex f = sqrfree(e);
+               if (!f.is_zero()) {
+                       clog << "sqrfree(" << e << ") returns " << f << " instead of 0\n";
+                       ++result;
+               }
+       } catch (const exception &err) {
+               clog << "sqrfree(" << e << ") throws " << err.what() << endl;
+               ++result;
+       }
+
+       e = pow(x-1,4) - expand(pow(x-1,4));  // ...and after differentiating twice.
+       try {
+               ex f = sqrfree(e);
+               if (!f.is_zero()) {
+                       clog << "sqrfree(" << e << ") returns " << f << " instead of 0\n";
+                       ++result;
+               }
+       } catch (const exception &err) {
+               clog << "sqrfree(" << e << ") throws " << err.what() << endl;
+               ++result;
+       }
+
+       return result;
+}
+
+// Bug in add ctor
+unsigned exam_paranoia25()
+{
+       symbol a("a"), b("b"), c("c");
+       ex e = -a + 2*b + c;
+
+       if (e.diff(c).nops() > 1) {
+               clog << "diff(" << e << ",c) was not fully evaluated.\n";
+               return 1;
+       }
+       return 0;
+}
+
+// Bug in partial fraction expansion
+unsigned exam_paranoia26()
+{
+       symbol x("x");
+       ex ex1=pow(x,4)/(x-1)/4;
+       ex ex2=sqrfree_parfrac(ex1,x);
+       ex e = (ex1-ex2).normal();
+
+       if (! e.is_zero()) {
+               clog << "partial fraction expansion of " << ex1 << " produces error.\n";
+               return 1;
+       }
+       return 0;
+}
+
+// Bug in power expansion
+unsigned exam_paranoia27()
+{
+       unsigned result = 0;
+       symbol x("x"), y("y"), a("a");
+       possymbol s("s"), t("t");
+       exmap pwrs =
+         { {pow((x+1)*(y-2)*(s-3)*(t+4), a), pow((x+1)*(y-2)*(s-3), a)*pow(t+4, a)},
+           {pow(2*(x+1)*(y-2)*(s-3)*(t+4), a), pow(2,a)*pow((x+1)*(y-2)*(s-3), a)*pow(t+4, a)},
+           {pow(-(x+1)*(y-2)*(s-3)*(t+4), a), pow(-(x+1)*(y-2)*(s-3), a)*pow(t+4, a)},
+           {pow(-2*(x+1)*(y-2)*(s-3)*(t+4), a), pow(2,a)*pow(-(x+1)*(y-2)*(s-3), a)*pow(t+4, a)} };
+
+       for (auto e : pwrs) {
+               if (! (e.first.expand()).is_equal(e.second) ) {
+                       clog << "power expansion of " << e.first << " produces error.\n";
+                       ++result;
+               }
+       }
+
+       return result;
+}
+
 unsigned exam_paranoia()
 {
        unsigned result = 0;
@@ -603,10 +710,15 @@ unsigned exam_paranoia()
        result += exam_paranoia18();  cout << '.' << flush;
        result += exam_paranoia19();  cout << '.' << flush;
        result += exam_paranoia20();  cout << '.' << flush;
+       result += exam_mul_info(); cout << '.' << flush;
        result += is_polynomial_false_positive(); cout << '.' << flush;
        result += exam_paranoia21();  cout << '.' << flush;
        result += exam_paranoia22();  cout << '.' << flush;
        result += exam_paranoia23();  cout << '.' << flush;
+       result += exam_paranoia24();  cout << '.' << flush;
+       result += exam_paranoia25();  cout << '.' << flush;
+       result += exam_paranoia26();  cout << '.' << flush;
+       result += exam_paranoia27();  cout << '.' << flush;
        
        return result;
 }