Add integration tests

Check that MongoDB Dev Services are not started when either
`quarkus.mongodb.connection-string` or `quarkus.mongodb.hosts` are
present.

To prevent regressions, this integration test ensures that Dev Services
are actually started (by checking the appropriate properties) for the
default client.

integration-tests/mongodb-devservices/src/main/resources/application.properties

@@ -1 +1,5 @@
 quarkus.mongodb.parameter-injection.write-concern.journal=true
+
+quarkus.mongodb.with-connection-string.connection-string=mongodb://localhost:27017
+
+quarkus.mongodb.with-hosts.hosts=localhost:27017

integration-tests/mongodb-devservices/src/test/java/io/quarkus/it/mongodb/DevServicesStartTest.java

@@ -0,0 +1,48 @@
+package io.quarkus.it.mongodb;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasKey;
+import static org.hamcrest.Matchers.not;
+
+import jakarta.inject.Inject;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import com.mongodb.client.MongoClient;
+
+import io.quarkus.mongodb.MongoClientName;
+import io.quarkus.test.common.DevServicesContext;
+import io.quarkus.test.common.QuarkusTestResource;
+import io.quarkus.test.junit.QuarkusTest;
+import io.quarkus.test.mongodb.MongoTestResource;
+
+@QuarkusTest
+@QuarkusTestResource(value = MongoTestResource.class)
+public class DevServicesStartTest {
+
+    DevServicesContext context;
+
+    @Inject
+    @MongoClientName("with-connection-string")
+    MongoClient clientWithConnectionString;
+
+    @Inject
+    @MongoClientName("with-hosts")
+    MongoClient clientWithHosts;
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "quarkus.mongodb.with-connection-string.connection-string",
+            "quarkus.mongodb.with-hosts.connection-string"
+    })
+    public void testDevServicesNotStarted(String property) {
+        assertThat(context.devServicesProperties(), not(hasKey(property)));
+    }
+
+    @Test
+    public void testDevServicesStarted() {
+        assertThat(context.devServicesProperties(), hasKey("quarkus.mongodb.connection-string"));
+    }
+}