## 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 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```

### 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);```