Check if config was reloaded, remove all upstream metrics if it was r… (#327)

src/test/kotlin/io/emeraldpay/dshackle/config/reload/ReloadConfigTest.kt

@@ -17,8 +17,10 @@ import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 import org.mockito.ArgumentCaptor
+import org.mockito.kotlin.any
 import org.mockito.kotlin.doReturn
 import org.mockito.kotlin.mock
+import org.mockito.kotlin.never
 import org.mockito.kotlin.times
 import org.mockito.kotlin.verify
 import org.mockito.kotlin.whenever
@@ -99,7 +101,7 @@ class ReloadConfigTest {
     }
 
     @Test
-    fun `stop multistream of there are no upstreams left`() {
+    fun `stop multistream if there are no upstreams left`() {
         val up1 = upstream("local1")
         val up2 = upstream("local2")
         val up3 = upstream("local3")
@@ -154,6 +156,25 @@ class ReloadConfigTest {
         )
     }
 
+    @Test
+    fun `reload the same config cause to nothing`() {
+        val initialConfigFile = ResourceUtils.getFile("classpath:configs/upstreams-initial.yaml")
+        val initialConfig = upstreamsConfigReader.read(initialConfigFile.inputStream())!!
+        mainConfig.upstreams = initialConfig
+
+        val reloadConfigUpstreamService = mock<ReloadConfigUpstreamService>()
+
+        val reloadConfig = ReloadConfigSetup(reloadConfigService, reloadConfigUpstreamService)
+
+        whenever(config.getConfigPath()).thenReturn(initialConfigFile)
+
+        reloadConfig.handle(Signal("HUP"))
+
+        verify(reloadConfigUpstreamService, never()).reloadUpstreams(any(), any(), any(), any())
+
+        assertEquals(initialConfig, mainConfig.upstreams)
+    }
+
     private fun upstream(id: String): Upstream =
         mock {
             on { getId() } doReturn id