Using Load in a test methods makes the test pass
조회 수: 2 (최근 30일)
이전 댓글 표시
The following test Passed! Why is that?
classdef minExample < matlab.unittest.TestCase
properties
end
methods(Test)
function test1(testCase)
% comment
save matlab
load matlab
verifyEqual(testCase,1,2);
end
end
end
답변 (2개)
Andy Campbell
2019년 10월 21일
Hi Erik,
The problem here is indeed the fact that the testCase is getting overwritten. Hence why if you assign the output of the load command to a structure the issue is not encountered. These steps are similar to something like the following:
classdef SomethingNotATestCase
methods
function verifyEqual(obj,varargin)
% do something else
end
end
end
Then inside the test, doing something like this:
classdef minExample < matlab.unittest.TestCase
methods(Test)
function test1(testCase)
testCase = SomethingNotATestCase
verifyEqual(testCase,1,2);
end
end
end
In both of these cases you have overwritten the testCase with something that is not the right thing to produce a test failure. This is perfectly allowable by the language. This is part of the reason why it is suggested to use the functional form of the load command, including with the output argument, because when you dont use the output argument you "poof" variables into the workspace, and this can overwrite existing variables. If you assign it to an output argument then you explicitly name your variable, and are much less likely to overwrite another variable unknowingly.
Hope that helps!
Andy
댓글 수: 0
per isakson
2019년 10월 18일
Looks like a bug to me, however in programs one ought to use the functional form
S = load('matlab.mat');
In that case the test fails as expected.
댓글 수: 3
per isakson
2019년 10월 18일
편집: per isakson
2019년 10월 18일
My memory fails me. However, when the current Matlab oop-stuff was introduced 10+ years ago there was a great deal of discussion about saving and loading objects.
Have a look at Save and Load Process for Objects
per isakson
2019년 10월 18일
Maybe this is of interest to you General-use object copy
Did you contact the Mathworks' tech-support?
참고 항목
카테고리
Help Center 및 File Exchange에서 Logical에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!