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.

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.

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);
            expSolution = [-1+3i, -1-3i];
            testCase.verifyEqual(actSolution,expSolution);
        end
    end
    
end

Run SolverTest Test Case

Create a test suite, quadTests.

quadTests = matlab.unittest.TestSuite.fromClass(?SolverTest);
result = run(quadTests);
Running SolverTest
..
Done SolverTest
__________

All tests passed.

Explore Output Argument, result

The output argument, result, is a matlab.unittest.TestResult object. It contains information of the two tests in SolverTest.

whos result
  Name        Size            Bytes  Class

  result      1x2               248  matlab.unittest.TestResult  

Display Information for One Test

To see the information for one value, type:

result(1)
ans = 

  TestResult with properties:

          Name: 'SolverTest/testRealSolution'
        Passed: 1
        Failed: 0
    Incomplete: 0
      Duration: 0.0064

Totals:
   1 Passed, 0 Failed, 0 Incomplete.
   0.0063833 seconds testing time.

Create Table of Test Results

To access functionality available to tables, create one from the TestResult object.

rt = table(result)
rt = 

                   Name                   Passed    Failed    Incomplete    Duration 
    __________________________________    ______    ______    __________    _________

    'SolverTest/testRealSolution'         true      false     false         0.0063833
    'SolverTest/testImaginarySolution'    true      false     false         0.0051785

Sort the test results by duration.

sortrows(rt,'Duration')
ans = 

                   Name                   Passed    Failed    Incomplete    Duration 
    __________________________________    ______    ______    __________    _________

    'SolverTest/testImaginarySolution'    true      false     false         0.0051785
    'SolverTest/testRealSolution'         true      false     false         0.0063833

Export test results to a CSV file.

writetable(rt,'myTestResults.csv','QuoteStrings',true)

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