How can I pass values from inside a TestRunner run?

hi,

I have a class inheriting from matlab.unittest.TestCase. This class runs through various test functions (test1, test2) which utilize matlab's unittest qualification methods. I'm recreating the class and running 'foo' for each idx.

However, I want to run some statistics on the data ITSELF across idx. This means , I need some way of either storing or passing 'MyData' for each run outside.

I thought about saving it locally and using it afterwards, but I would like something built-in.

classdef MyTest < matlab.unittest.TestCase

     properties (ClassSetupParameter)
        idx = num2cell(1:3);
     end

     properties
       MyData;
     end

     methods(TestClassSetup)
         function runfoo(testCase,idx)
            testCase.MyData = foo(testCase,idx);
         end 
     end

     methods(Test)
         function runtestsonfoo(testCase)
            test1(testCase);
            test2(testCaes);
         end 
     end
  end

Thank you!

Answer 1

[David Hruska]

You can use a TestRunnerPlugin to store data from the test run. I've included some example code below to show how this might work. The basic outline is as follows:

1. The test logs information using a Diagnostic subclass and TestCase.log
2. A plugin listens to the DiagnosticLogged event and stores the logged data on itself
3. After running the test, you can then access the data on the plugin

Example test code:

classdef MyTest < matlab.unittest.TestCase
    properties (ClassSetupParameter)
        idx = num2cell(1:3);
    end
    properties
        MyData;
    end
    methods(TestClassSetup)
        function createData(testCase,idx)
            testCase.MyData = idx;
            testCase.log(4, DataDiagnostic(testCase.MyData));
        end
    end
    methods(Test)
        function a(testCase)
        end
    end
end

Plugin code:

classdef MyPlugin < matlab.unittest.plugins.TestRunnerPlugin
    properties(SetAccess=private)
        Data = {};
    end
    methods(Access=protected)
        function testCase = createTestClassInstance(plugin, pluginData)
            testCase = [e-mail](plugin, pluginData);
            testCase.addlistener('DiagnosticLogged', @plugin.logDiagnostic);
        end
    end
    methods(Access=private)
        function logDiagnostic(plugin, src, evd)
            if isa(evd.Diagnostic, 'DataDiagnostic')
                plugin.Data{end+1} = evd.Diagnostic.Data;
            end
        end
    end
end

Diagnostic class code:

classdef DataDiagnostic < matlab.unittest.diagnostics.Diagnostic
    properties(SetAccess=immutable)
        Data;
    end
    methods
        function diag = DataDiagnostic(data)
            diag.Data = data;
        end
        function diagnose(~)
        end
    end
end

Usage:

>> suite = testsuite('MyTest');
>> runner = matlab.unittest.TestRunner.withTextOutput;
>> plugin = MyPlugin;
>> runner.addPlugin(plugin);
>> runner.run(suite);
Running MyTest
...
Done MyTest
__________

>> plugin.Data

ans =

    1×3 cell array

      {[1]}    {[2]}    {[3]}

References:

• TestRunnerPlugin
• TestCase.log

[Jack German]

This looks VERY promising, thank you!