## Create Simple Test Suites

This example shows how to combine tests into test suites, using the `SolverTest` test case. Use the static `from*` methods in the `matlab.unittest.TestSuite` class to create suites for combinations of your tests, whether they are organized in packages and classes or files and folders, or both.

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```

### Import TestSuite Class

At the command prompt, add the `matlab.unittest.TestSuite` class to the current import list.

```import matlab.unittest.TestSuite ```

Make sure the `SolverTest` class definition file is on your MATLAB® path.

### Create Suite from SolverTest Class

The `fromClass` method creates a suite from all `Test` methods in the `SolverTest` class.

```suiteClass = TestSuite.fromClass(?SolverTest); result = run(suiteClass);```

### Create Suite from SolverTest Class Definition File

The `fromFile` method creates a suite using the name of the file to identify the class.

```suiteFile = TestSuite.fromFile('SolverTest.m'); result = run(suiteFile); ```

### Create Suite from All Test Case Files in Current Folder

The `fromFolder` method creates a suite from all test case files in the specified folder. For example, the following files are in the current folder:

• BankAccountTest.m

• DocPolynomTest.m

• FigurePropertiesTest.m

• IsSupportedTest.m

• SolverTest.m

```suiteFolder = TestSuite.fromFolder(pwd); result = run(suiteFolder);```

### Create Suite from Single Test Method

The `fromMethod` method creates a suite from a single test method.

```suiteMethod = TestSuite.fromMethod(?SolverTest,'testRealSolution')' result = run(suiteMethod);```