matlabtest.plugins.codecoverage.StandaloneReport Class

R2026b

Namespace: matlabtest.plugins.codecoverage
Superclasses: matlab.unittest.plugins.codecoverage.CoverageFormat

Format for standalone code coverage report

Since R2024a

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Description

The matlabtest.plugins.codecoverage.StandaloneReport class provides a way to generate a standalone code coverage report as a single HTML file. To generate a code coverage report in this format, create a CodeCoveragePlugin instance using a StandaloneReport object, and then add the plugin to the test runner.

A standalone code coverage report is not interactive and contains hard-coded information. To generate an interactive code coverage report, use the matlab.unittest.plugins.codecoverage.CoverageReport class instead.

Creation

Description

format = matlabtest.plugins.codecoverage.StandaloneReport(filename) creates a StandaloneReport object that instructs CodeCoveragePlugin to generate a standalone code coverage report and save it using the specified filename.

example

Input Arguments

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Name of the standalone report file, specified as a string scalar or character vector ending in .html or .htm. The value can be a path relative to the current folder or an absolute path.

Example: "myCoverageReport.html"

Example: "C:\work\myCoverageReport.html"

Examples

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Open Script

Run a suite of tests and generate a standalone code coverage report as a single HTML file for your source code.

Open the example to access the required files and folders. When you open the example, the tests subfolder of your current folder contains tests defined in the BankAccountTest.m and DocPolynomTest.m files. The source subfolder contains the source code required by the tests.

BankAccountTest Class Definition

This code shows the contents of the BankAccountTest class definition file, which uses a shared fixture to access the folder defining the BankAccount class. For more information about the BankAccount class and to view the class code, see Developing Classes That Work Together.

classdef (SharedTestFixtures={ ...
        matlab.unittest.fixtures.PathFixture( ...
        fullfile("..","source"))}) ...
        BankAccountTest < matlab.unittest.TestCase

    methods (Test)
        function testConstructor(testCase)
            b = BankAccount(1234,100);
            testCase.verifyEqual(b.AccountNumber,1234, ...
                "Constructor must correctly set account number.")
            testCase.verifyEqual(b.AccountBalance,100, ...
                "Constructor must correctly set account balance.")
        end

        function testConstructorNotEnoughInputs(testCase)
            import matlab.unittest.constraints.Throws
            testCase.verifyThat(@()BankAccount,Throws("MATLAB:minrhs"))
        end

        function testDeposit(testCase)
            b = BankAccount(1234,100);
            b.deposit(25)
            testCase.verifyEqual(b.AccountBalance,125)
        end

        function testWithdraw(testCase)
            b = BankAccount(1234,100);
            b.withdraw(25)
            testCase.verifyEqual(b.AccountBalance,75)
        end

        function testNotifyInsufficientFunds(testCase)
            callbackExecuted = false;
            function testCallback(~,~)
                callbackExecuted = true;
            end

            b = BankAccount(1234,100);
            b.addlistener("InsufficientFunds",@testCallback);

            b.withdraw(50)
            testCase.assertFalse(callbackExecuted, ...
                "The callback should not have executed yet.")
            b.withdraw(60)
            testCase.verifyTrue(callbackExecuted, ...
                "The listener callback should have fired.")
        end
    end
end

DocPolynomTest Class Definition

This code shows the contents of the DocPolynomTest class definition file, which uses a shared fixture to access the folder defining the DocPolynom class. For more information about the DocPolynom class and to view the class code, see Representing Polynomials with Classes.

classdef (SharedTestFixtures={ ...
        matlab.unittest.fixtures.PathFixture( ...
        fullfile("..","source"))}) ...
        DocPolynomTest < matlab.unittest.TestCase

    properties
        TextToDisplay = "Equation under test: "
    end

    methods (Test)
        function testConstructor(testCase)
            p = DocPolynom([1 0 1]);
            testCase.verifyClass(p,?DocPolynom)
        end

        function testAddition(testCase)
            p1 = DocPolynom([1 0 1]);
            p2 = DocPolynom([5 2]);
            actual = p1 + p2;
            expected = DocPolynom([1 5 3]);
            diagnostic = [testCase.TextToDisplay ...
                "(x^2 + 1) + (5*x + 2) = x^2 + 5*x + 3"];
            testCase.verifyEqual(actual,expected,diagnostic)
        end

        function testMultiplication(testCase)
            p1 = DocPolynom([1 0 3]);
            p2 = DocPolynom([5 2]);
            actual = p1 * p2;
            expected = DocPolynom([5 2 15 6]);
            diagnostic = [testCase.TextToDisplay ...
                "(x^2 + 3) * (5*x + 2) = 5*x^3 + 2*x^2 + 15*x + 6"];
            testCase.verifyEqual(actual,expected,diagnostic)
        end
    end
end

Run Tests to Generate Report

Import the classes used in this example.

import matlab.unittest.plugins.CodeCoveragePlugin
import matlabtest.plugins.codecoverage.StandaloneReport

Create a test suite from the tests folder.

suite = testsuite("tests");

Create a test runner and customize it using a plugin that generates a standalone HTML code coverage report, including the statement, function, and decision coverage metrics, for the code in the source folder. Specify that the plugin writes its output to a file named report.html in your current folder.

runner = testrunner("textoutput");
format = StandaloneReport("report.html");
plugin = CodeCoveragePlugin.forFolder("source", ...
    Producing=format,Metrics="decision");
runner.addPlugin(plugin)

Run the tests. In this example, all the tests pass. The plugin generates a standalone code coverage report as a single HTML file in your current folder.

runner.run(suite);

Setting up PathFixture
Done setting up PathFixture: Added 'C:\work\source' to the path.
__________

Running BankAccountTest
.....
Done BankAccountTest
__________

Running DocPolynomTest
...
Done DocPolynomTest
__________

Tearing down PathFixture
Done tearing down PathFixture: Restored the path to its original state.
__________

Generating standalone report. Please wait.
    Preparing content for the standalone report.
    Adding content to the standalone report.
    Writing standalone report to file.
Standalone code coverage report has been saved to:
 C:\work\report.html

Open report.html. The report includes tables with detailed information about each file in the source folder.

open("report.html")

Since R2025a

Generate a standalone code coverage report by reusing justifications previously created for the source code under test. For more information about justifications, see Justify Missing Coverage for MATLAB Source Code.

Suppose that you previously justified the missing coverage for your source code and saved the justifications to a file named myFilters.xml in your current folder. Using the justifications in myFilters.xml, run your tests and produce a standalone code coverage report that includes the justifications.

import matlab.unittest.plugins.CodeCoveragePlugin
import matlabtest.plugins.codecoverage.StandaloneReport

runner = testrunner("textoutput");
format = StandaloneReport("report.html");
plugin = CodeCoveragePlugin.forFolder("myFolder", ...
    Producing=format,Filter="myFilters.xml");
runner.addPlugin(plugin)

suite = testsuite("MyTestClass");
results = runner.run(suite);

If you are using a MATLAB® project to organize your work, then you do not need to specify the Filter name-value argument. The testing framework automatically applies the justifications stored in the project.

Version History

Introduced in R2024a

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See Also

Functions

Classes

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