MATLAB Programming Fundamentals - MathWorks

Analyze Test Case Results

This example shows how to analyze the information returned by a test runner created

from the SolverTest test case.

Create Quadratic Solver Function

Create the following function that solves roots of the quadratic equation in a file,

quadraticSolver.m, in your working folder.

type quadraticSolver.m

function roots = quadraticSolver(a, b, c)

% quadraticSolver returns solutions to the

% quadratic equation a*x^2 + b*x + c = 0.

if ~isa(a,'numeric') || ~isa(b,'numeric') || ~isa(c,'numeric')

error('quadraticSolver:InputMustBeNumeric', ...

'Coefficients must be numeric.');

end

roots(1) = (-b + sqrt(b^2 - 4*a*c)) / (2*a);

roots(2) = (-b - sqrt(b^2 - 4*a*c)) / (2*a);

end

Create Test for Quadratic Solver Function

Create the following test class in a file, SolverTest.m, in your working folder.

type SolverTest.m

classdef SolverTest < matlab.unittest.TestCase

% SolverTest tests solutions to the quadratic equation

% a*x^2 + b*x + c = 0

methods (Test)

function testRealSolution(testCase)

actSolution = quadraticSolver(1,-3,2);

expSolution = [2,1];

testCase.verifyEqual(actSolution,expSolution);

end

function testImaginarySolution(testCase)

actSolution = quadraticSolver(1,2,10);

33 Unit Testing