problem: gives no status updates if chain is not configured

src/test/groovy/io/emeraldpay/dshackle/rpc/SubscribeStatusSpec.groovy

@@ -0,0 +1,60 @@
+package io.emeraldpay.dshackle.rpc
+
+import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.api.proto.Common
+import io.emeraldpay.dshackle.upstream.Multistream
+import io.emeraldpay.dshackle.upstream.MultistreamHolder
+import io.emeraldpay.dshackle.upstream.Upstream
+import io.emeraldpay.dshackle.upstream.UpstreamAvailability
+import io.emeraldpay.grpc.Chain
+import reactor.core.publisher.Mono
+import reactor.test.StepVerifier
+import spock.lang.Specification
+
+import java.time.Duration
+
+class SubscribeStatusSpec extends Specification {
+
+    def "gives UNAVAIL if non-configured chain is requested"() {
+        setup:
+        def ethereumUp = Mock(Upstream) {
+            _ * getStatus() >> UpstreamAvailability.OK
+        }
+        def ethereumUpAll = Mock(Multistream) {
+            _ * it.observeStatus() >> Mono.just(UpstreamAvailability.OK).repeat()
+                    .delayElements(Duration.ofMillis(100))
+            _ * it.getAll() >> [ethereumUp]
+        }
+        def ups = Mock(MultistreamHolder) {
+            _ * it.getAvailable() >> [Chain.ETHEREUM]
+            1 * it.getUpstream(Chain.ETHEREUM) >> ethereumUpAll
+            1 * it.getUpstream(Chain.BITCOIN) >> null
+        }
+        def ctrl = new SubscribeStatus(ups)
+
+        when:
+        def req = BlockchainOuterClass.StatusRequest.newBuilder()
+                .addChains(Common.ChainRef.CHAIN_ETHEREUM)
+                .addChains(Common.ChainRef.CHAIN_BITCOIN)
+                .build()
+        def act = ctrl.subscribeStatus(Mono.just(req))
+                .take(2)
+        // sort just for testing
+                .sort(new Comparator<BlockchainOuterClass.ChainStatus>() {
+                    @Override
+                    int compare(BlockchainOuterClass.ChainStatus o1, BlockchainOuterClass.ChainStatus o2) {
+                        return o1.chainValue <=> o2.chainValue
+                    }
+                })
+        then:
+        StepVerifier.create(act)
+                .expectNextMatches {
+                    it.chainValue == Chain.BITCOIN.id && it.availability == BlockchainOuterClass.AvailabilityEnum.AVAIL_UNAVAILABLE
+                }
+                .expectNextMatches {
+                    it.chainValue == Chain.ETHEREUM.id && it.availability == BlockchainOuterClass.AvailabilityEnum.AVAIL_OK
+                }
+                .expectComplete()
+                .verify(Duration.ofSeconds(3))
+    }
+}