applyFixture

构造一个脚手架，该脚手架从搜索路径中删除一个文件夹，并在您尝试删除不在该路径上的文件夹时不显示警告。该脚手架使用 SuppressedWarningsFixture 脚手架来禁用指定警告。作为拆解 RemoveFolderFromPathFixture 的一部分，测试框架还会适时清除 SuppressedWarningsFixture，从而将警告状态还原为其先前的值。

classdef RemoveFolderFromPathFixture < matlab.unittest.fixtures.Fixture
    properties (SetAccess = immutable)
        Folder (1,1) string
    end
    methods
        function fixture = RemoveFolderFromPathFixture(folder)
            fixture.Folder = folder;
        end
        function setup(fixture)
            import matlab.unittest.fixtures.SuppressedWarningsFixture
            
            % Delegate to SuppressedWarningsFixture to suppress display of warnings.
            fixture.applyFixture(SuppressedWarningsFixture('MATLAB:rmpath:DirNotFound'));
            
            % Remove the folder from the path.
            originalPath = path;
            fixture.addTeardown(@()path(originalPath));
            rmpath(fixture.Folder);
        end
    end
    methods (Access = protected)
        function bool = isCompatible(fixture1,fixture2)
            bool = fixture1.Folder == fixture2.Folder;
        end
    end
end

委托工作以创建临时文本文件

构建一个脚手架，该脚手架用于创建临时文本文件。该脚手架使用 TemporaryFolderFixture 脚手架构建一个临时文件夹，然后在该文件夹中创建一个文本文件。作为拆解 TemporaryTextFileFixture 的一部分，框架还会适时清除 TemporaryFolderFixture，从而删除该文件夹及其中的内容。

classdef TemporaryTextFileFixture < matlab.unittest.fixtures.Fixture
    properties (SetAccess = private)
        File
    end   
    methods
        function setup(fixture)
            import matlab.unittest.fixtures.TemporaryFolderFixture
            
            % Delegate to TemporaryFolderFixture to create a temporary folder.
            tempFixture = fixture.applyFixture(TemporaryFolderFixture);
            
            fixture.File = fullfile(tempFixture.Folder,'file.txt');
            
            fid = fopen(fixture.File,'wt');
            fixture.fatalAssertNotEqual(fid,-1);
            
            status = fclose(fid);
            fixture.fatalAssertEqual(status,0);
        end
    end
end