Mocking DynamicGraphQLClient for tests

[acorobceanu]

Hello,

New smallrye-graphql client user here. I am trying to write unit tests for the dynamic client. When tried to inject mock into my test, I got following error:

    @InjectMock
    DynamicGraphQLClient dynamicClient;

Runtime Error:

org.junit.jupiter.api.extension.TestInstantiationException: Failed to create test instance

	at io.quarkus.test.junit.QuarkusTestExtension.initTestState(QuarkusTestExtension.java:784)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:750)
	at java.base/java.util.Optional.orElseGet(Optional.java:364)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.lang.NullPointerException: Cannot invoke "jakarta.enterprise.inject.spi.Annotated.getAnnotation(java.lang.Class)" because the return value of "jakarta.enterprise.inject.spi.InjectionPoint.getAnnotated()" is null
	at io.smallrye.graphql.client.impl.dynamic.cdi.NamedDynamicClients.getClient(NamedDynamicClients.java:38)
	at io.smallrye.graphql.client.impl.dynamic.cdi.NamedDynamicClients_ProducerMethod_getClient_M4a52a9vYFD5mlkFtF0TG_U8YVg_Bean.doCreate(Unknown Source)
	at io.smallrye.graphql.client.impl.dynamic.cdi.NamedDynamicClients_ProducerMethod_getClient_M4a52a9vYFD5mlkFtF0TG_U8YVg_Bean.create(Unknown Source)
	at io.smallrye.graphql.client.impl.dynamic.cdi.NamedDynamicClients_ProducerMethod_getClient_M4a52a9vYFD5mlkFtF0TG_U8YVg_Bean.get(Unknown Source)
	at io.smallrye.graphql.client.impl.dynamic.cdi.NamedDynamicClients_ProducerMethod_getClient_M4a52a9vYFD5mlkFtF0TG_U8YVg_Bean.get(Unknown Source)
	at io.quarkus.arc.impl.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:553)
	at io.quarkus.arc.impl.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:533)
	at io.quarkus.arc.impl.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:566)
	at io.quarkus.arc.impl.ArcContainerImpl.instanceHandle(ArcContainerImpl.java:528)
	at io.quarkus.arc.impl.ArcContainerImpl.instance(ArcContainerImpl.java:303)
	at io.quarkus.test.junit.mockito.internal.CreateMockitoMocksCallback.getBeanHandle(CreateMockitoMocksCallback.java:92)
	at io.quarkus.test.junit.mockito.internal.CreateMockitoMocksCallback.injectField(CreateMockitoMocksCallback.java:47)
	at io.quarkus.test.junit.mockito.internal.CreateMockitoMocksCallback.afterConstruct(CreateMockitoMocksCallback.java:37)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at io.quarkus.test.junit.AbstractTestWithCallbacksExtension.invokeCallbacks(AbstractTestWithCallbacksExtension.java:158)
	at io.quarkus.test.junit.AbstractTestWithCallbacksExtension.invokeAfterConstructCallbacks(AbstractTestWithCallbacksExtension.java:64)
	at io.quarkus.test.junit.QuarkusTestExtension.initTestState(QuarkusTestExtension.java:781)
	... 4 more

Any examples out there on how to do it?

[acorobceanu]

For now I found a workaround with mocking our GraphQL interfaces without injecting mock. Something like this:

// no mock injection
DynamicGraphQLClient dynamicClient;

@BeforeEach
void setUp() {
    dynamicClient = mock(DynamicGraphQLClient.class);
    ....
}

@Test
void someTest() {
....
// dynamic client
when(dynamicClient.executeAsync(any(Document.class))).thenReturn(Uni.createFrom().item(response));
....
}

[jmartisk]

Hi, sorry for not being quick to respond, I'm at a conference, hopefully we'll get time to look at it next week. But it seems odd to me that the graphql client CDI producer is called when you just want a mock. I think it may be a bug