unit_testing.cpp

// Copyright 2019 Adam Campbell, Seth Hall, Andrew Ensor
// High Performance Computing Research Laboratory, 
// Auckland University of Technology (AUT)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <cstdlib>
#include <cstdio>
#include <gtest/gtest.h>

#include "direct_fourier_transform.h"

// Test performs DFT on a fixed set of sources, produces a set of visibilities using said sources
// and compares these visibilities against a set of correct visibilities for these sources.
// A threshold is used to determine acceptance as equality is not an ideal assertion for
// non-integer numbers due to rounding error.
TEST(DFTTest, VisibilitiesApproximatelyEqual)
{
	double threshold = 1e-5; // 0.00001
	double difference = unit_test_generate_approximate_visibilities();
    ASSERT_LE(difference, threshold); // x <= y
}

int main(int argc, char **argv) {
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}