matlabtest.coder.MEXReplacementTestSuite.fromNamespace

Class: matlabtest.coder.MEXReplacementTestSuite
Namespace: matlabtest.coder

Create MEX replacement test suite from tests in namespace

Since R2025a

Syntax

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(namespace,mexFcn)

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(namespace,mexFcn,selector)

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(___,Name=Value)

Description

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(namespace,mexFcn) creates a MEX replacement test suite from the MATLAB^® tests in the namespace specified by namespace. The tests call the MEX function specified by mexFcn.

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(namespace,mexFcn,selector) includes only the tests that satisfy the conditions of the specified selector.

suite = matlabtest.coder.MEXReplacementTestSuite.fromNamespace(___,Name=Value) specifies options using one or more name-value arguments in addition to the input argument combinations in previous syntaxes.

Input Arguments

namespace — Name of namespace that contains tests

string scalar | character vector

Name of the namespace that contains the tests, specified as a string scalar or character vector. For more information about namespaces, see Create Namespaces.

Example: "myNamespace"

Example: "myNamespace.innerNamespace"

mexFcn — MEX function to call in tests

string scalar | character vector | string array | cell array of character vectors | cell array of string scalars

MEX function to call in tests, specified as a string scalar, character vector, string array, cell array of character vectors, or cell array of string scalars. Specify the relative or full path to the MEX function. You do not need to include the file extension.

Example: "myMexFcn"

Example: "myMexFcn.mexw64"

Example: ["myMexFcn1","myMexFcn2"]

Example: {'myMexFcn1','myMexFcn2'}

selector — Selector

matlab.unittest.selectors.Selector object

Selector, specified as a matlab.unittest.selectors.Selector object.

Example: matlab.unittest.selectors.HasTag("SystemTests")

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Example: suite = matlabtest.coder.MEXReplacementTestSuite.fromFile("myNamespace","myMexFcn.mexw64",IncludingInnerNamespaces=true)

BaseFolder — Name of base folder

string array | character vector | cell array of character vectors

Name of the base folder that contains the tests, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the Test element must be contained in one of the base folders specified by BaseFolder. If none of the Test elements are in the base folder, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

For test files defined in namespaces, the base folder is the parent of the top-level namespace folder.

Example: BaseFolder="tests"

DependsOn — Names of files and folders to find dependent tests for

string vector | character vector | cell vector of character vectors

Names of files and folders to find dependent tests for, specified as a string vector, character vector, or cell vector of character vectors. This argument filters the test suite by including only the tests that depend on the specified files and folders. If none of the tests depend on the files and folders, the function returns as empty test suite.

The specified value must represent at least one existing file. If you specify a folder, the framework extracts the paths to the files within the folder.

You must have a MATLAB Test™ license to use DependsOn. For more information about selecting tests by source code dependency, see matlabtest.selectors.DependsOn.

Example: DependsOn=["myFile.m" "myFolder"]

Example: DependsOn=["folderA" "C:\work\folderB"]

ExternalParameters — External parameters to use in tests

array of matlab.unittest.parameters.Parameter objects

External parameters to use in the tests, specified as an array of matlab.unittest.parameters.Parameter objects. Use this argument to specify external parameters outside of the parameterized test.. For more information, see Use External Parameters in Parameterized Test.

InvalidFileFoundAction — Action to take against invalid test files

"warn" (default) | "error"

Action to take against the invalid test files in folder, specified as one of these values:

• "warn" — The method issues a warning for each invalid test file in folder and creates a test suite from the valid files.

• "error" — The method throws an error if it finds an invalid test file in folder.

An invalid test file is a test file from which the framework cannot generate a test suite. Examples include a test file that contains syntax errors, a function-based test file that is missing local functions, or a file with a Test method that is passed an undefined parameterization property.

IncludingInnerNamespaces — Option to include tests in inner namespaces

false or 0 (default) | true or 1

Option to include the tests in the inner namespaces of namespace, specified as a numeric or logical 0 (false) or 1 (true). By default, the method does not include the tests in inner namespaces.

Name — Name of test

string array | character vector | cell array of character vectors

Name of the test, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the Name property of the Test element must match one of the names specified by Name. If none of the Test elements have a matching name, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

For a given test file, the name of a test uniquely identifies the smallest runnable portion of the test content. The test name includes the namespace name, filename (excluding the extension), procedure name, and information about parameterization.

Example: Name="myTestFile/myTestProcedure"

ParameterProperty — Name of test class property that defines a parameter

string array | character vector | cell array of character vectors

Name of a test class property that defines a parameter used by the test, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the Parameterization property of the Test element must contain at least one of the property names specified by ParameterProperty. If none of the Test elements have a matching property name, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

ParameterName — Name of parameter

string array | character vector | cell array of character vectors

Name of a parameter used by the test, specified as a string array, character vector, or cell array of character vectors. MATLAB generates parameter names based on the test class property that defines the parameters. For example:

• If the property value is a cell array, MATLAB generates parameter names from the elements of the cell array based on their values, types, and dimensions.

• If the property value is a structure, MATLAB generates parameter names from the structure fields.

The ParameterName argument filters the test suite. For the testing framework to include a test in the filtered suite, the Parameterization property of the Test element must contain at least one of the parameter names specified by ParameterName. If none of the Test elements have a matching parameter name, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

ProcedureName — Name of test procedure

string array | character vector | cell array of character vectors

Name of the test procedure, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the ProcedureName property of the Test element must match one of the procedure names specified by ProcedureName. If none of the Test elements have a matching procedure name, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

In a class-based test, the name of a test procedure is the name of a Test method that contains the test. In a function-based test, it is the name of a local function that contains the test. In a script-based test, it is a name generated from the test section title. Unlike the name of a test suite element, the name of a test procedure does not include namespace names, filenames, or information about parameterization.

Example: ProcedureName="myTestProcedure"

Superclass — Name of class that test class derives from

string array | character vector | cell array of character vectors

Name of the class that the test class derives from, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the TestClass property of the Test element must point to a test class that derives from one of the classes specified by Superclass. If none of the Test elements match a class, the function returns an empty test suite.

Example: Superclass="matlab.unittest.TestCase"

Tag — Name of tag

string array | character vector | cell array of character vectors

Name of a tag used by the test, specified as a string array, character vector, or cell array of character vectors. This argument filters the test suite. For the testing framework to include a test in the filtered suite, the Tags property of the Test element must contain at least one of the tag names specified by Tag. If none of the Test elements have a matching tag name, the function returns an empty test suite. Use the wildcard character (*) to match any number of characters. Use the question mark character (?) to match a single character.

Example: Tag="SystemTests"

Output Arguments

suite — MEX replacement test suite

matlab.unittest.Test array

MEX replacement test suite, returned as an array of matlab.unittest.Test objects.

Attributes

Static

true

To learn about attributes of methods, see Method Attributes.

Examples

Create MEX Replacement Test Suites from Namespace

Create MEX replacement test suites by using the matlabtest.coder.MEXReplacementTestSuite.fromNamespace method.

In a file named add5.m in the present directory, create the add5 function. The function accepts a numeric input and increments it by 5. If you call the function with a nonnumeric input, the function generates an error.

function y = add5(x)
% add5 - Increment input by 5
if ~isa(x,"numeric")
    error("add5:InputMustBeNumeric","Input must be numeric.")
end
y = x + 5;
end

This example assumes that a namespace named myNamespace exists in your current folder. Create the namespace if it does not exist.

[~,~] = mkdir("+myNamespace")

To test the add5 function, create the Add5Test class in a file named Add5Test.m in myNamespace. The class tests the function against numeric and nonnumeric inputs.

classdef Add5Test < matlab.unittest.TestCase
    properties (TestParameter)
        type = {'double','single','int8','int32'};
    end

    methods (Test)
        function numericInput(testCase,type)
            actual = add5(cast(1,type));
            testCase.verifyClass(actual,type)
        end
        function nonnumericInput(testCase)
            testCase.verifyError(@() add5("0"), ...
                "add5:InputMustBeNumeric")
        end
    end
end

Generate a MEX function from the add5 function with the required input types and sizes.

cfg = coder.config("mex");
x_type_double = coder.typeof(0, [1, 1], false);
x_type_single = coder.typeof(single(0), [1, 1], false);
x_type_int8 = coder.typeof(int8(0), [1, 1], false);
x_type_int32 = coder.typeof(int32(0), [1, 1], false);
x_type_string = coder.typeof("a");
x_type_string.StringLength = Inf;

codegen add5 -config cfg -args {x_type_double} ...
-args {x_type_single} -args {x_type_int8} ...
-args {x_type_int32} -args {x_type_string}

Code generation successful.

Import the matlabtest.coder.MEXReplacementTestSuite and matlab.unittest.selectors.HasParameter classes.

import matlabtest.coder.MEXReplacementTestSuite
import matlab.unittest.selectors.HasParameter

Create a MEX replacement test suite from the tests in the tests folder. Specify the MEX file to call in the test, add5_mex.

mexFcn = which("add5_mex");
suite1 = MEXReplacementTestSuite.fromNamespace( ...
    "myNamespace",mexFcn);
disp({suite1.Name}')

    {'myNamespace.Add5Test/numericInput(type=double)'}
    {'myNamespace.Add5Test/numericInput(type=single)'}
    {'myNamespace.Add5Test/numericInput(type=int8)'  }
    {'myNamespace.Add5Test/numericInput(type=int32)' }
    {'myNamespace.Add5Test/nonnumericInput'          }

Create a test suite that includes only the parameterized tests from myNamespace.

selector = HasParameter;
suite2 = MEXReplacementTestSuite.fromNamespace( ...
    "myNamespace",mexFcn,selector);
disp({suite2.Name}')

    {'myNamespace.Add5Test/numericInput(type=double)'}
    {'myNamespace.Add5Test/numericInput(type=single)'}
    {'myNamespace.Add5Test/numericInput(type=int8)'  }
    {'myNamespace.Add5Test/numericInput(type=int32)' }

Create a test suite that includes only the tests whose name contains "nonnumeric" from myNamespace.

suite3 = MEXReplacementTestSuite.fromNamespace( ...
    "myNamespace",mexFcn,Name="*nonnumeric*");
disp({suite3.Name}')

    {'myNamespace.Add5Test/nonnumericInput'}

Run the tests.

results = run([suite1 suite2 suite3]);

Setting up MEXReplacementFixture
Done setting up MEXReplacementFixture: Replacing MATLAB function calls with the specified MEX functions
__________

Running Add5Test
.......... ....
Done Add5Test
__________

Alternatives

You can also use the coder.runTest (MATLAB Coder) function to run existing tests that replace calls to MATLAB functions with calls to MEX functions. However, the matlabtest.coder.MEXReplacementTestSuite class provides these advantages over the coder.runTest (MATLAB Coder) function:

• You can run tests from multiple test files.

• You can collect coverage for the generated C/C++ code.

• You can generate test and coverage reports from the results.

• You can run MEX replacement test suites on CI platforms.

• You can run MEX replacement test suites and MATLAB test suites in the same run by executing a single command.

For more information, see Verify Generated C/C++ Code by Running Existing MATLAB Tests.

Version History

Introduced in R2025a