1 /** @file exam_powerlaws.cpp
3 * Tests for power laws. You shouldn't try to draw much inspiration from
4 * this code, it is a sanity check rather deeply rooted in GiNaC's classes. */
7 * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 static unsigned exam_powerlaws1(void)
34 ex e1=power(power(x,a),b);
35 if (!(is_ex_exactly_of_type(e1,power) &&
36 is_ex_exactly_of_type(e1.op(0),power) &&
37 is_ex_exactly_of_type(e1.op(0).op(0),symbol) &&
38 is_ex_exactly_of_type(e1.op(0).op(1),symbol) &&
39 is_ex_exactly_of_type(e1.op(1),symbol) &&
40 e1.is_equal(power(power(x,a),b)) )) {
41 clog << "(x^a)^b, x,a,b symbolic wrong" << endl;
42 clog << "returned: " << e1 << endl;
47 if (!(is_ex_exactly_of_type(e2,power) &&
48 is_ex_exactly_of_type(e2.op(0),symbol) &&
49 is_ex_exactly_of_type(e2.op(1),symbol) &&
50 e2.is_equal(power(x,b)) )) {
51 clog << "(x^a)^b, x,b symbolic, a==1 wrong" << endl;
52 clog << "returned: " << e2 << endl;
57 if (!(is_ex_exactly_of_type(e3,power) &&
58 is_ex_exactly_of_type(e3.op(0),power) &&
59 is_ex_exactly_of_type(e3.op(0).op(0),symbol) &&
60 is_ex_exactly_of_type(e3.op(0).op(1),numeric) &&
61 is_ex_exactly_of_type(e3.op(1),symbol) &&
62 e3.is_equal(power(power(x,-1),b)) )) {
63 clog << "(x^a)^b, x,b symbolic, a==-1 wrong" << endl;
64 clog << "returned: " << e3 << endl;
68 ex e4=e1.subs(lst(a==-1,b==2.5));
69 if (!(is_ex_exactly_of_type(e4,power) &&
70 is_ex_exactly_of_type(e4.op(0),power) &&
71 is_ex_exactly_of_type(e4.op(0).op(0),symbol) &&
72 is_ex_exactly_of_type(e4.op(0).op(1),numeric) &&
73 is_ex_exactly_of_type(e4.op(1),numeric) &&
74 e4.is_equal(power(power(x,-1),2.5)) )) {
75 clog << "(x^a)^b, x symbolic, a==-1, b==2.5 wrong" << endl;
76 clog << "returned: " << e4 << endl;
80 ex e5=e1.subs(lst(a==-0.9,b==2.5));
81 if (!(is_ex_exactly_of_type(e5,power) &&
82 is_ex_exactly_of_type(e5.op(0),symbol) &&
83 is_ex_exactly_of_type(e5.op(1),numeric) &&
84 e5.is_equal(power(x,numeric(-0.9)*numeric(2.5))) )) {
85 clog << "(x^a)^b, x symbolic, a==-0.9, b==2.5 wrong" << endl;
86 clog << "returned: " << e5 << endl;
90 ex e6=e1.subs(lst(a==numeric(3)+numeric(5.3)*I,b==-5));
91 if (!(is_ex_exactly_of_type(e6,power) &&
92 is_ex_exactly_of_type(e6.op(0),symbol) &&
93 is_ex_exactly_of_type(e6.op(1),numeric) &&
94 e6.is_equal(power(x,numeric(-15)+numeric(5.3)*numeric(-5)*I)) )) {
95 clog << "(x^a)^b, x symbolic, a==3+5.3*I, b==-5 wrong" << endl;
96 clog << "returned: " << e6 << endl;
102 static unsigned exam_powerlaws2(void)
104 // (a*x)^b = a^b * x^b
111 if (!(is_ex_exactly_of_type(e1,power) &&
112 is_ex_exactly_of_type(e1.op(0),mul) &&
113 (e1.op(0).nops()==2) &&
114 is_ex_exactly_of_type(e1.op(0).op(0),symbol) &&
115 is_ex_exactly_of_type(e1.op(0).op(1),symbol) &&
116 is_ex_exactly_of_type(e1.op(1),symbol) &&
117 e1.is_equal(power(a*x,b)) )) {
118 clog << "(a*x)^b, x,a,b symbolic wrong" << endl;
119 clog << "returned: " << e1 << endl;
124 if (!(is_ex_exactly_of_type(e2,power) &&
125 is_ex_exactly_of_type(e2.op(0),mul) &&
126 (e2.op(0).nops()==2) &&
127 is_ex_exactly_of_type(e2.op(0).op(0),symbol) &&
128 is_ex_exactly_of_type(e2.op(0).op(1),numeric) &&
129 is_ex_exactly_of_type(e2.op(1),symbol) &&
130 e2.is_equal(power(3*x,b)) )) {
131 clog << "(a*x)^b, x,b symbolic, a==3 wrong" << endl;
132 clog << "returned: " << e2 << endl;
136 ex e3=e1.subs(b==-3);
137 if (!(is_ex_exactly_of_type(e3,mul) &&
139 is_ex_exactly_of_type(e3.op(0),power) &&
140 is_ex_exactly_of_type(e3.op(1),power) &&
141 e3.is_equal(power(a,-3)*power(x,-3)) )) {
142 clog << "(a*x)^b, x,a symbolic, b==-3 wrong" << endl;
143 clog << "returned: " << e3 << endl;
147 ex e4=e1.subs(b==4.5);
148 if (!(is_ex_exactly_of_type(e4,power) &&
149 is_ex_exactly_of_type(e4.op(0),mul) &&
150 (e4.op(0).nops()==2) &&
151 is_ex_exactly_of_type(e4.op(0).op(0),symbol) &&
152 is_ex_exactly_of_type(e4.op(0).op(1),symbol) &&
153 is_ex_exactly_of_type(e4.op(1),numeric) &&
154 e4.is_equal(power(a*x,4.5)) )) {
155 clog << "(a*x)^b, x,a symbolic, b==4.5 wrong" << endl;
156 clog << "returned: " << e4 << endl;
160 ex e5=e1.subs(lst(a==3.2,b==3+numeric(5)*I));
161 if (!(is_ex_exactly_of_type(e5,mul) &&
163 is_ex_exactly_of_type(e5.op(0),power) &&
164 is_ex_exactly_of_type(e5.op(1),numeric) &&
165 e5.is_equal(power(x,3+numeric(5)*I)*
166 power(numeric(3.2),3+numeric(5)*I)) )) {
167 clog << "(a*x)^b, x symbolic, a==3.2, b==3+5*I wrong" << endl;
168 clog << "returned: " << e5 << endl;
172 ex e6=e1.subs(lst(a==-3.2,b==3+numeric(5)*I));
173 if (!(is_ex_exactly_of_type(e6,mul) &&
175 is_ex_exactly_of_type(e6.op(0),power) &&
176 is_ex_exactly_of_type(e6.op(1),numeric) &&
177 e6.is_equal(power(-x,3+numeric(5)*I)*
178 power(numeric(3.2),3+numeric(5)*I)) )) {
179 clog << "(a*x)^b, x symbolic, a==-3.2, b==3+5*I wrong" << endl;
180 clog << "returned: " << e6 << endl;
184 ex e7=e1.subs(lst(a==3+numeric(5)*I,b==3.2));
185 if (!(is_ex_exactly_of_type(e7,power) &&
186 is_ex_exactly_of_type(e7.op(0),mul) &&
187 (e7.op(0).nops()==2) &&
188 is_ex_exactly_of_type(e7.op(0).op(0),symbol) &&
189 is_ex_exactly_of_type(e7.op(0).op(1),numeric) &&
190 is_ex_exactly_of_type(e7.op(1),numeric) &&
191 e7.is_equal(power((3+numeric(5)*I)*x,3.2)) )) {
192 clog << "(a*x)^b, x symbolic, a==3+5*I, b==3.2 wrong" << endl;
193 clog << "returned: " << e7 << endl;
200 static unsigned exam_powerlaws3(void)
202 // numeric evaluation
204 ex e1=power(numeric(4),numeric(1)/numeric(2));
206 clog << "4^(1/2) wrongly returned " << e1 << endl;
210 ex e2=power(numeric(27),numeric(2)/numeric(3));
212 clog << "27^(2/3) wrongly returned " << e2 << endl;
216 ex e3=power(numeric(5),numeric(1)/numeric(2));
217 if (!(is_ex_exactly_of_type(e3,power) &&
218 e3.op(0).is_equal(numeric(5)) &&
219 e3.op(1).is_equal(numeric(1)/numeric(2)) )) {
220 clog << "5^(1/2) wrongly returned " << e3 << endl;
224 ex e4=power(numeric(5),evalf(numeric(1)/numeric(2)));
225 if (!(is_ex_exactly_of_type(e4,numeric))) {
226 clog << "5^(0.5) wrongly returned " << e4 << endl;
230 ex e5=power(evalf(numeric(5)),numeric(1)/numeric(2));
231 if (!(is_ex_exactly_of_type(e5,numeric))) {
232 clog << "5.0^(1/2) wrongly returned " << e5 << endl;
239 static unsigned exam_powerlaws4(void)
241 // test for mul::eval()
247 ex f1=power(a*b,ex(1)/ex(2));
248 ex f2=power(a*b,ex(3)/ex(2));
257 clog << "(a*b)^(1/2)*(a*b)^(3/2)*c wrongly returned " << e1 << endl;
263 unsigned exam_powerlaws(void)
267 cout << "examining power laws" << flush;
268 clog << "----------power laws:" << endl;
270 result += exam_powerlaws1(); cout << '.' << flush;
271 result += exam_powerlaws2(); cout << '.' << flush;
272 result += exam_powerlaws3(); cout << '.' << flush;
273 result += exam_powerlaws4(); cout << '.' << flush;
276 cout << " passed " << endl;
277 clog << "(no output)" << endl;
279 cout << " failed " << endl;