From daf5e150da756deb950023d61f0643dac875c941 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Wed, 6 Oct 2010 18:50:35 -0400 Subject: Make tests test for accuracy. --- tests/Midpoint.cpp | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'tests/Midpoint.cpp') diff --git a/tests/Midpoint.cpp b/tests/Midpoint.cpp index aea1885..9be7bb7 100644 --- a/tests/Midpoint.cpp +++ b/tests/Midpoint.cpp @@ -2,6 +2,7 @@ #include #include #include +#include // y' = y (y == C*exp(t)) double @@ -14,12 +15,23 @@ int main() { vZ::MidpointIntegrator integrator(f); - integrator.y(1.0).x(0.0).h(0.02); + integrator.y(1.0).x(0.0).h(0.01); integrator.integrate(2.0); - std::cout << integrator.y() << std::endl - << std::exp(2.0) << std::endl; + double actual = integrator.y(); + double expected = std::exp(2.0); - return EXIT_SUCCESS; + std::cout << std::setprecision(10) + << "Numerical: " << actual << std::endl + << "Expected: " << expected << std::endl; + + double error = std::fabs(expected - actual)/expected; + if (error > 3.4e-5) { + std::cerr << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_FAILURE; + } else { + std::cout << "Error: " << 100.0*error << "%" << std::endl; + return EXIT_SUCCESS; + } } -- cgit v1.2.3