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#include <unittest/unittest.h>
#include <thrust/copy.h>
#include <thrust/device_vector.h>
#include <thrust/functional.h>
#include <thrust/host_vector.h>
#include <thrust/iterator/counting_iterator.h>
#include <thrust/iterator/discard_iterator.h>
#include <thrust/iterator/transform_output_iterator.h>
#include <thrust/reduce.h>
#include <thrust/sequence.h>
#include <thrust/sort.h>
template <typename T>
struct TestTransformOutputIteratorReduceByKey
{
void operator()(const size_t n)
{
thrust::host_vector<T> h_keys = unittest::random_samples<T>(n);
thrust::sort(h_keys.begin(), h_keys.end());
thrust::device_vector<T> d_keys = h_keys;
thrust::host_vector<T> h_values = unittest::random_samples<T>(n);
thrust::device_vector<T> d_values = h_values;
thrust::host_vector<T> h_result(n);
thrust::device_vector<T> d_result(n);
// run on host
thrust::reduce_by_key(thrust::host,
h_keys.begin(),
h_keys.end(),
thrust::make_transform_iterator(h_values.begin(), thrust::negate<T>()),
thrust::discard_iterator<T>{},
h_result.begin());
// run on device
thrust::reduce_by_key(thrust::device,
d_keys.begin(),
d_keys.end(),
d_values.begin(),
thrust::discard_iterator<T>{},
thrust::make_transform_output_iterator(d_result.begin(),
thrust::negate<T>()));
ASSERT_EQUAL(h_result, d_result);
}
};
VariableUnitTest<TestTransformOutputIteratorReduceByKey, SignedIntegralTypes>
TestTransformOutputIteratorReduceByKeyInstance;
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