MATLAB: How to use constant property when defining TestParameter in unittest.

MATLABooptestparameterunittestunittest testparameter constant

A constant class property can be used when defining a content of other class properties (e.g. testConstant1 below).

But when this other property is in the TestParameter property block (e.g. testConstant2) matlab complains that 'The class UnitTestConstantInTestParams has no Constant property or Static method named 'CONST_VALUE''.

    classdef UnitTestConstantInTestParams < matlab.unittest.TestCase
        properties
            testConstant1 = num2cell(1:UnitTestConstantInTestParams.CONST_VALUE);
        end
        properties (Constant)
            CONST_VALUE = 5;
        end
        properties (TestParameter)
            % testConstant2 = num2cell(1:5);
            testConstant2 = num2cell(1:UnitTestConstantInTestParams.CONST_VALUE);
        end
        methods (Test)
            function testConstValues1(testCase)
                for value = testCase.testConstant1
                end
            end
            function testConstValues2(testCase, testConstant2)
            end
        end
    end

Is this a known and desired behavior?

Tested in 8.6.0.267246 (R2015b).

Best Answer

This is a bug:

https://www.mathworks.com/support/bugreports/1212962

The bug report mentions Static methods but the same issue applies to Constant properties.

Related Solutions

MATLAB: Matlab Unit test for structure input. How to use same test for n numbers.

Hi Sudhakar,

As per my understanding, you can make use of the “TestParameter” property available in MATLAB in order to create the structure of values and use the structure in the verifyEqual, summary of the test is displayed in the table at the end of the test result.

Here is how you can do:

classdef ClassTest < matlab.unittest.TestCase
    
    properties (Access = private)
        out
    end
    properties (TestParameter)
        testValue={1,2,3,4}
    end
    
    methods (Test)
        function MyTest(testCase, testValue)
            testCase.verifyEqual(testValue,2);
        end
    end
    
end

Hope this Helps!

MATLAB: Is there a way share TestParameter and ClassSetupParameter properties of unit test class

Hi Yvan,

it sounds like you simply need access to the same parameters in a TestClassSetup as you do in one or more of your test methods right? The way to do this is to state these properties as ClassSetupParameters (only) and then within a TestClassSetup method you can assign them to another "normal" instance property of your test class and then you can access that property within your test method. This looks like the following:

classdef TestWithSharedParameters < matlab.unittest.TestCase
    %   
    properties(ClassSetupParameter)
        categorie=loadmat(1);
        classe=loadmat(2);
        source=loadmat(3);
        donneeRef=loadmat(4);
    end
    properties
        CurrentCategorie;
        CurrentClasse;
        CurrentSource;
        CurrentDonneeRef;
    end
    %



    methods(TestClassSetup)
        function doSomeSetup(testCase, categorie, classe, source, donneeRef)
            % Do your setup with categorie, classe, source, donneeRef

        end
        function assignClassParams(testCase, categorie, classe, source, donneeRef)
            testCase.CurrentCategorie = categorie;
            testCase.CurrentClasses = classe;
            testCase.CurrentSource = source;
            testCase.CurrentDonneeRef = donneeRef;
        end
    end
    %
    methods(Test)
        function testThatUsesClassParams(testCase)
            callFunctionUsingParams(...
                testCase.CurrentCategorie, ...
                testCase.CurrentClasses, ...
                testCase.CurrentSource, ...
                testCase.CurrentDonneeRef);
        end
    end
end

As you see you do need to use additional properties, but there are actually some good reasons for that. For one, TestParameters have different semantics than ClassSetupParameters and both of them have different semantics than normal instance properties. However, as you can see, you can always shared the properties across TestClassSetup methods using these instance properties. If you dont want to create another property per parameter you can also just add them to a struct and have a single property to communicate between methods, something like this:

classdef TestWithSharedParameters < matlab.unittest.TestCase
      properties(ClassSetupParameter)
          categorie=loadmat(1);
          classe=loadmat(2);
          source=loadmat(3);
          donneeRef=loadmat(4);
      end
      properties
          Params = struct;
      end
      %
      methods(TestClassSetup)
          function doSomeSetup(testCase, categorie, classe, source, donneeRef)
              % Do your setup with categorie, classe, source, donneeRef
          end
          function assignClassParams(testCase, categorie, classe, source, donneeRef)
              testCase.Params.categorie = categorie;
              testCase.Params.classes = classe;
              testCase.Params.source = source;
              testCase.Params.donneeRef = donneeRef;
          end
      end
      %
      methods(Test)
          function testThatUsesClassParams(testCase)
              callFunctionUsingParams(...
                  testCase.Params.categorie, ...
                  testCase.Params.classes, ...
                  testCase.Params.source, ...
                  testCase.Params.donneeRef);
          end
      end
  end

Hope that helps!

Best Answer

Related Solutions

MATLAB: Matlab Unit test for structure input. How to use same test for n numbers.

MATLAB: Is there a way share TestParameter and ClassSetupParameter properties of unit test class

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