MyRule1
and MyRule2
MyRule2
depends on MyRule1
MyRule1
"before" method should therefore run before the MyRule2
"before" method.In JUnit 4, it can be implemented this way, via the RuleChain :
static MyRule1 myRule1 = new MyRule1();
static MyRule2 myRule2 = new MyRule2(myRule1);
@Rule
TestRule ruleChain = RuleChain.outerRule(myRule1)
.around(myRule2);
In JUnit 5, I have to implement it this way :
static MyRule1 myRule1 = new MyRule1();
@RegisterExtension
static MyRule2 myRule2 = new MyRule2(myRule1);
with MyRule2
:
class MyRule2 implements BeforeAllCallback {
private final MyRule1 myRule1;
public MyRule2(MyRule1 myRule1) {
this.myRule1 = myRule1;
}
@Override
public void beforeAll(ExtensionContext extensionContext) {
this.myRule1.beforeAll();
X x = this.myRule1.getX();
// do Rule 2 stuff with x
}
}
It's the equivalent of the JUnit 4 implementation when it comes to the result.
But I have to explicitly and manually call the beforeAll()
callback of MyRule1
in MyRule2
.
I would like that MyRule2
would not be responsible for MyRule1
execution.
I went through the Extension Model documentation of JUnit 5 but didn't find anything on extensions that depend on other extensions.
For extensions registered via @RegisterExtension
, there is currently (as of JUnit Jupiter 5.3.1) no built-in support analogous to JUnit 4's RuleChain
.
However, this issue links to a custom solution and also proposes support for @Order
to control the order in which extensions are executed.