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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/vespalib/util/invokeserviceimpl.h>
#include <atomic>
using namespace vespalib;
struct InvokeCounter {
InvokeCounter() : _count(0) {}
void inc() noexcept { _count++; }
void wait_for_atleast(uint64_t n) {
while (_count <= n) {
std::this_thread::sleep_for(1ms);
}
}
std::atomic<uint64_t> _count;
};
TEST("require that wakeup is called") {
InvokeCounter a;
InvokeServiceImpl service(1ms);
EXPECT_EQUAL(0u, a._count);
auto ra = service.registerInvoke([&a]() noexcept { a.inc(); });
EXPECT_TRUE(ra);
a.wait_for_atleast(1);
ra.reset();
uint64_t countAtStop = a._count;
std::this_thread::sleep_for(1s);
EXPECT_EQUAL(countAtStop, a._count);
}
TEST("require that now is moving forward") {
steady_time prev = steady_clock::now();
InvokeCounter a;
InvokeServiceImpl service(1ms);
EXPECT_EQUAL(0u, a._count);
auto ra = service.registerInvoke([&prev, &a, &now= service.nowRef() ]() noexcept {
EXPECT_GREATER(now.load(), prev);
prev = now.load();
a.inc();
});
EXPECT_TRUE(ra);
a.wait_for_atleast(100);
ra.reset();
EXPECT_GREATER_EQUAL(a._count, 100u);
steady_time now = steady_clock::now();
EXPECT_GREATER(now, prev);
EXPECT_LESS(now - prev, 5s);
}
TEST("require that same wakeup can be registered multiple times.") {
InvokeCounter a;
InvokeCounter b;
InvokeCounter c;
InvokeServiceImpl service(1ms);
EXPECT_EQUAL(0u, a._count);
auto ra1 = service.registerInvoke([&a]() noexcept { a.inc(); });
EXPECT_TRUE(ra1);
auto rb = service.registerInvoke([&b]() noexcept { b.inc(); });
EXPECT_TRUE(rb);
auto rc = service.registerInvoke([&c]() noexcept { c.inc(); });
EXPECT_TRUE(rc);
a.wait_for_atleast(1);
b.wait_for_atleast(1);
c.wait_for_atleast(1);
auto ra2 = service.registerInvoke([&a]() noexcept { a.inc(); });
EXPECT_TRUE(ra2);
rb.reset();
uint64_t countAtStop = b._count;
uint64_t a_count = a._count;
uint64_t c_count = c._count;
std::this_thread::sleep_for(1s);
EXPECT_EQUAL(countAtStop, b._count);
uint64_t diff_c = c._count - c_count;
uint64_t diff_a = a._count - a_count;
EXPECT_LESS((diff_c*3)/2, diff_a); // diff_c*3/2 should still be smaller than diff_a(2x)
}
TEST_MAIN() { TEST_RUN_ALL(); }
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