Implement simple health check mechanism

Change-Id: Ic4b8b59ced9dc19c9ebf26131036a9e1a752164f
Issue-ID: DCAEGEN2-659
Signed-off-by: Jakub Dudycz <jakub.dudycz@nokia.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/hv-collector-health-check/src/test/kotlin/org/onap/dcae/collectors/veshv/healthcheck/impl/HealthStateProviderImplTest.kt b/hv-collector-health-check/src/test/kotlin/org/onap/dcae/collectors/veshv/healthcheck/impl/HealthStateProviderImplTest.kt
new file mode 100644
index 00000000..e9c487bf
--- /dev/null
+++ b/hv-collector-health-check/src/test/kotlin/org/onap/dcae/collectors/veshv/healthcheck/impl/HealthStateProviderImplTest.kt
@@ -0,0 +1,54 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.collectors.veshv.healthcheck.impl
+
+import org.jetbrains.spek.api.Spek
+import org.jetbrains.spek.api.dsl.describe
+import org.jetbrains.spek.api.dsl.given
+import org.jetbrains.spek.api.dsl.it
+import org.jetbrains.spek.api.dsl.on
+import org.onap.dcae.collectors.veshv.healthcheck.api.HealthState
+import reactor.test.StepVerifier
+
+/**
+ * @author Jakub Dudycz <jakub.dudycz@nokia.com>
+ * @since August 2018
+ */
+object HealthStateProviderImplTest : Spek({
+    describe("Health state provider") {
+            val healthStateProviderImpl = HealthStateProviderImpl()
+            on("health state update") {
+                healthStateProviderImpl.changeState(HealthState.HEALTHY)
+                healthStateProviderImpl.changeState(HealthState.WAITING_FOR_CONSUL_CONFIGURATION)
+                healthStateProviderImpl.changeState(HealthState.WAITING_FOR_CONSUL_CONFIGURATION)
+                healthStateProviderImpl.changeState(HealthState.CONSUL_CONFIGURATION_NOT_FOUND)
+
+                it("should push new health state to the subscriber") {
+                    StepVerifier
+                            .create(healthStateProviderImpl().take(4))
+                            .expectNext(HealthState.HEALTHY)
+                            .expectNext(HealthState.WAITING_FOR_CONSUL_CONFIGURATION)
+                            .expectNext(HealthState.WAITING_FOR_CONSUL_CONFIGURATION)
+                            .expectNext(HealthState.CONSUL_CONFIGURATION_NOT_FOUND)
+                            .verifyComplete()
+                }
+            }
+    }
+})
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