'How to set custom test execution order for a test suite in JUnit5?

I have a large set of tests on JUnit5, which I run in parallel in several threads. There is also information about the time of each test. I want to run at the beginning of the longest tests, and leave the fastest at the end to optimize common execution time.

I have not found a way to do this in JUnit5.

In version 5.4 there is an org.junit.jupiter.api.MethodOrderer interface which allows you to write a test sorter within a test class. And connect to the test class via the annotation org.junit.jupiter.api.TestMethodOrder.

I would like something similar, but globally, for the whole test suite.

javaunit-testingtestingjunitjunit5javascripthtmlcss


Solution 1:[1]

It is now possible to order test classes in JUnit 5 (since v5.8.0).

src/test/resources/junit-platform.properties:

# ClassOrderer$OrderAnnotation sorts classes based on their @Order annotation
junit.jupiter.testclass.order.default=org.junit.jupiter.api.ClassOrderer$OrderAnnotation

Other Junit built-in class orderer implementations:

org.junit.jupiter.api.ClassOrderer$ClassName
org.junit.jupiter.api.ClassOrderer$DisplayName
org.junit.jupiter.api.ClassOrderer$Random

For other ways (beside junit-platform.properties file) to set configuration parameters refer here.

You can also provide your own orderer. It must implement ClassOrderer interface:

package foo;
public class MyOrderer implements ClassOrderer {
    @Override
    public void orderClasses(ClassOrdererContext context) {
        Collections.shuffle(context.getClassDescriptors());
    }
}

junit.jupiter.testclass.order.default=foo.MyOrderer

Note that @Nested test classes cannot be ordered by a ClassOrderer.

Refer to JUnit 5 documentations and ClassOrderer api docs to learn more about ordering test classes.

Solution 2:[2]

The style tag does not actually have a disabled property per the HTML spec https://www.w3.org/TR/html401/present/styles.html#h-14.2.3

<!ELEMENT STYLE - - %StyleSheet        -- style info -->
<!ATTLIST STYLE
  %i18n;                               -- lang, dir, for use with title --
  type        %ContentType;  #REQUIRED -- content type of style language --
  media       %MediaDesc;    #IMPLIED  -- designed for use with these media --
  title       %Text;         #IMPLIED  -- advisory title --
  >

However, the dom spec does have a disabled property (https://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-16428977):

interface HTMLStyleElement : HTMLElement {
           attribute boolean         disabled;
           attribute DOMString       media;
           attribute DOMString       type;
};

Thus your JS can change the DOM and disable the style tag, however, there is no way to disable the style tag directly from HTML.

Solution 3:[3]

Style has no disabled attribute as per the spec.

https://www.w3.org/TR/html401/present/styles.html#h-14.2.3

%i18n; -- lang, dir, for use with title -- type %ContentType; #REQUIRED -- content type of style language -- media %MediaDesc; #IMPLIED -- designed for use with these media -- title %Text; #IMPLIED -- advisory title --

Also style is a Head Tag:

The STYLE element allows authors to put style sheet rules in the head of the document. HTML permits any number of STYLE elements in the HEAD section of a document.

Sources

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Source: Stack Overflow

Solution Source
Solution 1
Solution 2
Solution 3 Wakka

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