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// -*- mode: c++; c-basic-offset: 2; -*-
#include "common.hh"
#include "test.hh"
#include "observers.hh"
namespace {
bool test_sanity() {
Observers<int> obs;
ASSERT_EQ(false, obs.notify().has_next());
obs.insert(1);
auto it = obs.notify();
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(1, it.next());
ASSERT_EQ(false, it.has_next());
obs.erase(2);
it = obs.notify();
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(1, it.next());
obs.erase(1);
ASSERT_EQ(false, obs.notify().has_next());
return true;
}
bool test_insert() {
Observers<int> obs;
auto it = obs.notify();
ASSERT_EQ(false, it.has_next());
obs.insert(1);
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(1, it.next());
obs.insert(2);
ASSERT_EQ(false, it.has_next());
it = obs.notify();
ASSERT_EQ(true, it.has_next());
int other;
switch (it.next()) {
case 1:
other = 2;
break;
case 2:
other = 1;
break;
default:
ASSERT_TRUE(false);
}
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(other, it.next());
return true;
}
bool test_erase() {
Observers<int> obs;
auto it = obs.notify();
ASSERT_EQ(false, it.has_next());
obs.insert(1);
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(1, it.next());
ASSERT_EQ(false, it.has_next());
obs.erase(1);
auto it2 = obs.notify();
ASSERT_EQ(false, it2.has_next());
it = it2;
obs.insert(4);
obs.insert(3);
obs.insert(2);
it = obs.notify();
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(2, it.next());
obs.erase(2);
it2 = obs.notify();
ASSERT_EQ(true, it2.has_next());
ASSERT_EQ(3, it2.next());
obs.erase(3);
ASSERT_EQ(true, it.has_next());
ASSERT_EQ(4, it.next());
ASSERT_EQ(true, it2.has_next());
ASSERT_EQ(4, it2.next());
return true;
}
} // namespace
int main(void) {
BEFORE;
RUN(test_sanity());
RUN(test_insert());
RUN(test_erase());
AFTER;
}
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