hll/test/TablesTest.cpp

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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#include <catch.hpp>

#include "CubicInterpolation.hpp"

namespace datasketches {

TEST_CASE("hll tables: interpolation exception", "[hll_tables]") {
  REQUIRE_THROWS_AS(CubicInterpolation<>::usingXAndYTables(-1.0), std::invalid_argument);

  REQUIRE_THROWS_AS(CubicInterpolation<>::usingXAndYTables(1e12), std::invalid_argument);
}

TEST_CASE("hll tables: check corner case", "[hll_tables]") {
  int len = 10;
  double xArr[] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};
  double yArr[] = {2.0, 4.0, 8.0, 16.0, 32.0, 64.0, 128.0, 256.0, 512.0, 1024.0};
  double x = xArr[len - 1];
  double y = CubicInterpolation<>::usingXAndYTables(xArr, yArr, len, x);
  double yExp = yArr[len - 1];
  REQUIRE(y == yExp);
}

} /* namespace datasketches */