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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/dual_merge_director.h>
using namespace vespalib;
struct MySource : public DualMergeDirector::Source {
bool typeA;
std::string data;
std::string diff;
MySource(bool a, size_t num_sources, size_t source_id);
~MySource();
void merge(Source &mt) override {
MySource &rhs = static_cast<MySource&>(mt);
ASSERT_EQUAL(typeA, rhs.typeA);
ASSERT_EQUAL(data.size(), rhs.data.size());
for (size_t i = 0; i < data.size(); ++i) {
int d = (rhs.data[i] - '0');
data[i] += d;
diff[i] += d;
rhs.diff[i] -= d;
}
}
void verifyFinal() const {
EXPECT_EQUAL(std::string(data.size(), '1'), data);
EXPECT_EQUAL(std::string(diff.size(), '6'), diff);
}
void verifyIntermediate() const {
EXPECT_EQUAL(std::string(diff.size(), '5'), diff);
}
};
MySource::MySource(bool a, size_t num_sources, size_t source_id)
: typeA(a),
data(num_sources, '0'),
diff(num_sources, '5')
{
if (source_id < num_sources) {
data[source_id] = '1';
diff[source_id] = '6';
}
}
MySource::~MySource() {}
TEST_MT_F("require that merging works", 64, std::unique_ptr<DualMergeDirector>()) {
for (size_t use_threads = 1; use_threads <= num_threads; ++use_threads) {
MySource sourceA(true, use_threads, thread_id);
MySource sourceB(false, use_threads, thread_id);
if (thread_id == 0) {
f1.reset(new DualMergeDirector(use_threads));
}
TEST_BARRIER();
if (thread_id < use_threads) {
f1->dualMerge(thread_id, sourceA, sourceB);
}
TEST_BARRIER();
if (thread_id == 0) {
sourceA.verifyFinal();
sourceB.verifyFinal();
} else if (thread_id < use_threads) {
sourceA.verifyIntermediate();
sourceB.verifyIntermediate();
}
}
}
TEST_MAIN() { TEST_RUN_ALL(); }
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