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Example needed: Singleton container #1138
Description
There is a pattern which we never documented but it is helpful when you want to have a single container per JVM. We call it "Singleton container".
The idea is trivial and does not depend on any testing framework:
First, define a base class for the tests, let's say AbstractIntegrationTest.
Then, define a container as a static property:
class AbstractIntegrationTest {
public static final GenericContainer redis = new GenericContainer(...)
.withExposedPorts(...);
}Now we need to start it, but only once. Without relying on the testing framework, we can do it with a static block (JVM will trigger it only once, on class loading):
class AbstractIntegrationTest {
public static final GenericContainer redis = ...;
static {
redis.start();
}
}That's it! Every test class with extends AbstractIntegrationTest will have a container started & running, and the container will be terminated only on JVM shutdown.
An example should have at least 2 different classes with the tests to demonstrate it.
Activity
chungngoops commentedon Jan 16, 2019
I would like to take this issue.
kiview commentedon Jan 24, 2019
Hey @chungngoops, this is great!
You already started with it, or have any questions?
chungngoops commentedon Jan 24, 2019
@kiview : I already started with it, I will have my PR ASAP!
SushmaReddyLoka commentedon Dec 29, 2020
Does this example support running tests ,
examples/singleton-container/src/test/java/com/example/BarConcreteTestClass.java and
examples/singleton-container/src/test/java/com/example/FooConcreteTestClass.java
in parallel ?