make scm-webapp depend optional of scm-landingpage-plugin // add some events for landingpage

scm-webapp/src/test/java/sonia/scm/plugin/PluginCenterLoaderTest.java

@@ -24,12 +24,16 @@
     
 package sonia.scm.plugin;
 
+import com.sun.mail.iap.Argument;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Answers;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
+import sonia.scm.event.ScmEventBus;
 import sonia.scm.net.ahc.AdvancedHttpClient;
 
 import java.io.IOException;
@@ -37,6 +41,10 @@ import java.util.Collections;
 import java.util.Set;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 @ExtendWith(MockitoExtension.class)
@@ -50,6 +58,9 @@ class PluginCenterLoaderTest {
   @Mock
   private PluginCenterDtoMapper mapper;
 
+  @Mock
+  private ScmEventBus eventBus;
+
   @InjectMocks
   private PluginCenterLoader loader;
 
@@ -71,4 +82,13 @@ class PluginCenterLoaderTest {
     Set<AvailablePlugin> fetch = loader.load(PLUGIN_URL);
     assertThat(fetch).isEmpty();
   }
+
+  @Test
+  void shouldThrowExceptionAndFirePluginCenterNotAvailableEvent() throws IOException {
+    when(client.get(PLUGIN_URL).request()).thenThrow(new IOException("failed to fetch"));
+
+    loader.load(PLUGIN_URL);
+
+    verify(eventBus).post(any(PluginCenterLoader.PluginCenterNotAvailableEvent.class));
+  }
 }