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/* THE OUTPUT IS:
creating empty vector
+ 2
== size: 2
+ 2
== size: 4
creating empty vector
+ 2
== size: 2
+ 1
== size: 3
creating empty vector
+ 1
== size: 1
*/
#include <iostream>
#include <vector>
#include <set>
using namespace std;
set<pair<const char*, int> > passed_subcases;
set<int> entered_levels;
int current_level;
bool has_skipped;
struct Subcase {
Subcase(const char* file, int line)
: m_entered(false)
, m_file(file)
, m_line(line)
{
m_entered = false;
// if we have already completed it
if(passed_subcases.count(pair<const char*, int>(file, line)) != 0)
return;
// if a Subcase on the same level has already been entered
if(entered_levels.count(current_level) != 0) {
has_skipped = true;
return;
}
entered_levels.insert(current_level++);
m_entered = true;
}
~Subcase() {
if(m_entered) {
current_level--;
// only mark the subcase as passed if no subcases have been skipped
if(has_skipped == false)
passed_subcases.insert(pair<const char*, int>(m_file, m_line));
}
}
operator bool() const { return m_entered; }
bool m_entered;
const char* m_file;
int m_line;
};
#define STR_CONCAT_IMPL(s1, s2) s1##s2
#define STR_CONCAT(s1, s2) STR_CONCAT_IMPL(s1, s2)
#define ANON_VAR STR_CONCAT(anon, __LINE__)
#define subcase(title) if(const Subcase& ANON_VAR = Subcase(__FILE__, __LINE__))
void test() {
cout << endl << "creating empty vector" << endl;
vector<int> data;
subcase("size should grow to 2") {
cout << "+ 2" << endl;
data.push_back(42);
data.push_back(10);
cout << "== size: " << data.size() << endl;
subcase("size should grow to 4") {
cout << "+ 2" << endl;
data.push_back(666);
data.push_back(100);
cout << "== size: " << data.size() << endl;
}
subcase("size should grow to 3") {
cout << "+ 1" << endl;
data.push_back(666);
cout << "== size: " << data.size() << endl;
}
}
subcase("size should grow to 1") {
cout << "+ 1" << endl;
data.push_back(42);
cout << "== size: " << data.size() << endl;
}
}
int main() {
passed_subcases.clear();
do {
has_skipped = false;
current_level = 0;
entered_levels.clear();
test();
} while(has_skipped == true);
return 0;
}
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