Better approach to write Junit5 tests for spring boot application

Question

I created a Test class:

void comp() throws IOException{
Foo foo=new Foo()
String file=readFile("xyz.txt")
Model model=foo.generate(file)
Assert.assertEquals(model.getMapA().size(),0);
Assert.assertEquals(model.getMapB().size(),0);
Assert.assertEquals(model.getListC().size(),10);

}  

Is this a good approach to writing the Junit test? I mean all the asserts inside one method. An alternate approach I could think of is to have a setup method that will generate the model class and a separate method for checking the size of each attribute. The class Foo is a controller class in a spring boot application.

I am using Junit5. I also saw that Hamcrest is popular, but the last release was on Jul 09, 2012 Which raises a question should we use it or not

Answer 1

The main problem in your test scenario is when the first assertion fails you do not see results of next assertions, I would recommend to start using AssertJ assertions , in that case your assertions would look like (very basic example though):

Model model=foo.generate(file);
SoftAssertions.assertSoftly(softly -> {
    softly.assertThat(model.getMapA()).isEmpty();
    softly.assertThat(model.getMapB()).isEmpty();
    softly.assertThat(model.getListC()).hasSize(10);
});