equalsverifier | EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hash | Unit Testing library
kandi X-RAY | equalsverifier Summary
kandi X-RAY | equalsverifier Summary
EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hashCode methods in a class is met. The Maven coordinates are:. Note that there's also a 'fat' jar with no transitive dependencies with artifactId equalsverifier-nodep.
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Top functions reviewed by kandi - BETA
- Add date - time classes .
- Returns the factory cache .
- Start the downloader .
- Returns set of excluded fields .
- Checks that the equals method is final .
- Performs a value reflexivity check .
- Checks if the field should be ignored .
- Visits all fields in the given type .
- Verify that record invariants .
- Validates class annotations .
equalsverifier Key Features
equalsverifier Examples and Code Snippets
License : Strong Copyleft (CC BY-SA 4.0)
Copy@Test
void Should_RespectEqualsContract() {
EqualsVerifier
.forClass(Configuration.class)
.withPrefabValues(
URI.class,
URI.create("http://a.com"),
URI.create("http://b.com"))
Community Discussions
Trending Discussions on equalsverifier
QUESTION
When running equalsverfier in quarkus dev mode, equalsverfier tests fail.
I tried to test a class with equalsverifier. This works in my IDE. I tried to use it in quarkus dev mode (by running ./mvnw quarkus:dev), but then it fails with the following exception:
...ANSWER
Answered 2021-Dec-03 at 15:31EqualsVerifier uses Objenesis to create instances of classes, and it keeps the same reference of the objenesis object around for performance reasons. It caches all the objects it has created before, so that makes things quicker when you want to create the same object over and over again, which EqualsVerifier tends to do.
However, EqualsVerifier keeps a static reference to objenesis, which means that it lives as long as the JVM does. It turns out that the Quarkus test runner can re-run the same tests again and again, and it creates a new class loader each time. But part of the equality of java.lang.Class is that the classloader that created the class, must also be the same. So it couldn't retrieve these objects from its cache anymore and returnd instances with classloaders that are now different from the other objects created in the test, and this caused the exceptions that you saw.
In version 3.8 of EqualsVerifier (created as a result of this StackOverflow post), this issue can be avoided by adding #withResetCaches() like this:
QUESTION
I have a record that performs a verification in its constructor as such :
...ANSWER
Answered 2021-Nov-05 at 07:13You're very close. You shouldn't provide the class that you're testing as a prefab value; instead you need to provide the paramter that's causing trouble, like this:
QUESTION
I am creating the tests for two classes that share a list of data. When I use EqualsVerifier I get an error because it is asking me for a list with data shared by these two classes.
This is the error:
Recursive datastructure. Add prefab values for one of the following types: CustomerView, List, YearConfigView
This is the @Test class:
ANSWER
Answered 2021-Mar-09 at 08:50Creator of EqualsVerifier here.
Without seeing your classes (I'd like to see exactly which fields CustomerView and YearConfigView have, and how equals and hashCode are implemented on both classes), it's hard to say for certain what's going on, but I suspect it's this:
CustomerViewhas a reference toYearConfigView(or perhapsList), andYearConfigViewhas a reference toCustomerView.
EqualsVerifier, while doing its thing, tries to make instances of the classes it's verifying, and giving its fields proper values too. In order to do that, it must recursively instantiate the class's fields and give those values too. Usually, that's not a problem, but sometimes you run into a loop, like in your case: in order to create a value for CustomerView, it must have a value for YearConfigView and vice versa.
The way to avoid this, is by giving EqualsVerifier some 'prefab values'. I see you've already tried to do something like this, by adding .withGenericPrefabValues(CustomerView.class). (This method requires 2 parameters so I suspect you may have removed some code before posting it to StackOverflow 😉) This only works if CustomerView is itself a generic class, which I can't verify because you didn't post that particular piece of code. In any event, you shouldn't give generic prefab values or regular prefab values for the class you're testing.
In general, though, your tests should both give a prefab value for the other class. That would look like this:
QUESTION
I have an spring boot gradle project etl with a dependency of common core classes in another project named common.
common/build.gradle
...ANSWER
Answered 2020-Jun-05 at 16:13The problem was because of spring boot plugin being present in both etl and common projects. so I found out that in the cammon/build.gradle I have to add this piece of code:
QUESTION
I got an error after upgrading Spring Boot version from 2.1.11 to 2.2.4. Then I upgraded spring-cloud-starter-openfeign from 2.0.2 to 2.2.1, but it didn't help.
The following method did not exist:
...ANSWER
Answered 2020-Feb-06 at 06:33Have a look at the Javadoc for versions 2.1.11 and 2.2.4 respectively. The older version still exposes this method taking an int argument but already states that it's deprecated and that you should use java.time.Duration instead.
The method accepting java.time.Duration still exists in 2.2.4 and you should use that one instead.
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