TEST(Constraints, Basic) {
typedef Variable<string, set_property_space<int>> Vars;
Vars A("A");
Vars B("B");
Problem<Vars> p;
// check empty problem
EXPECT_EQ("{}",toString(p));
EXPECT_EQ("{}",toString(p.solve()));
// add a constraint
p.add(sub(A, B));
EXPECT_EQ("{\n\tA ⊑ B\n}",toString(p));
EXPECT_EQ("{A->{},B->{}}",toString(p.solve()));
// add another constraints
std::set<int> s = { 1, 2 };
p.add(sub(s,A));
EXPECT_EQ("{\n\tA ⊑ B,\n\t{1,2} ⊑ A\n}",toString(p));
EXPECT_EQ("{A->{1,2},B->{1,2}}",toString(p.solve()));
// and one more
std::set<int> s2 = { 3 };
p.add(sub(s2,B));
EXPECT_EQ("{\n\tA ⊑ B,\n\t{1,2} ⊑ A,\n\t{3} ⊑ B\n}",toString(p));
EXPECT_EQ("{A->{1,2},B->{1,2,3}}",toString(p.solve()));
}
