84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
/* ----------------------------------------------------------------------------
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* GTSAM Copyright 2010, Georgia Tech Research Corporation,
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* Atlanta, Georgia 30332-0415
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* All Rights Reserved
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* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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* See LICENSE for the license information
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* -------------------------------------------------------------------------- */
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/*
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* @file testDiscretePrior.cpp
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* @brief unit tests for DiscretePrior
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* @author Frank dellaert
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* @date December 2021
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*/
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#include <CppUnitLite/TestHarness.h>
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#include <gtsam/discrete/DiscretePrior.h>
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#include <gtsam/discrete/Signature.h>
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using namespace std;
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using namespace gtsam;
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static const DiscreteKey X(0, 2);
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/* ************************************************************************* */
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TEST(DiscretePrior, constructors) {
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DecisionTreeFactor f(X, "0.4 0.6");
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DiscretePrior expected(f);
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DiscretePrior actual(X % "2/3");
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EXPECT_LONGS_EQUAL(1, actual.nrFrontals());
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EXPECT_LONGS_EQUAL(0, actual.nrParents());
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EXPECT(assert_equal(expected, actual, 1e-9));
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const vector<double> pmf{0.4, 0.6};
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DiscretePrior actual2(X, pmf);
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EXPECT_LONGS_EQUAL(1, actual2.nrFrontals());
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EXPECT_LONGS_EQUAL(0, actual2.nrParents());
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EXPECT(assert_equal(expected, actual2, 1e-9));
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}
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/* ************************************************************************* */
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TEST(DiscretePrior, Multiply) {
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DiscreteKey A(0, 2), B(1, 2);
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DiscreteConditional conditional(A | B = "1/2 2/1");
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DiscretePrior prior(B, "1/2");
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DiscreteConditional actual = prior * conditional; // P(A|B) * P(B)
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EXPECT_LONGS_EQUAL(2, actual.nrFrontals()); // = P(A,B)
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DecisionTreeFactor factor(A & B, "1 4 2 2");
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DiscreteConditional expected(2, factor);
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EXPECT(assert_equal(expected, actual, 1e-5));
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}
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/* ************************************************************************* */
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TEST(DiscretePrior, operator) {
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DiscretePrior prior(X % "2/3");
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EXPECT_DOUBLES_EQUAL(prior(0), 0.4, 1e-9);
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EXPECT_DOUBLES_EQUAL(prior(1), 0.6, 1e-9);
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}
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/* ************************************************************************* */
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TEST(DiscretePrior, pmf) {
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DiscretePrior prior(X % "2/3");
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vector<double> expected {0.4, 0.6};
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EXPECT(prior.pmf() == expected);
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}
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/* ************************************************************************* */
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TEST(DiscretePrior, sample) {
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DiscretePrior prior(X % "2/3");
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prior.sample();
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}
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/* ************************************************************************* */
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int main() {
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TestResult tr;
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return TestRegistry::runAllTests(tr);
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}
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/* ************************************************************************* */
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