You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tgelu.m
    path of file: ./repos/transformer-models/test/transformer/layer
    
    the code of the file until where you have to start completion: classdef tgelu < matlab.unittest.TestCase

    
function matchesExpectedValue(test,Value)
            % Check gelu matches the non-approximate version within some
            % tolerance.
            actual = test.gelu(Value);
            expected = Value * normcdf(Value);
            tol = test.mixedTolerance();
            constraint = matlab.unittest.constraints.IsEqualTo(expected,'Within',tol);
            test.verifyThat(actual,constraint);
        end
        
        function supportsMultipleTypes(test,Cast)
            % Check gelu supports various input types and has the expected
            % value.
            num = pi;
            casted = Cast(num);
            expected = test.gelu(num);
            actual = test.gelu(casted);
            test.verifyEqual(actual,Cast(expected));
        end