create unit tests for ScmConfigChangedListener

scm-core/src/test/java/sonia/scm/config/ScmConfigurationChangedListenerTest.java

@@ -0,0 +1,60 @@
+package sonia.scm.config;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import sonia.scm.user.UserManager;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class ScmConfigurationChangedListenerTest {
+
+  @Mock
+  UserManager userManager;
+
+  ScmConfiguration scmConfiguration = new ScmConfiguration();
+
+  @InjectMocks
+  ScmConfigurationChangedListener listener = new ScmConfigurationChangedListener(userManager);
+
+  @Test
+  void shouldCreateAnonymousUserIfAnoymousAccessEnabled() {
+    when(userManager.contains(any())).thenReturn(false);
+
+    ScmConfiguration changes = new ScmConfiguration();
+    changes.setAnonymousAccessEnabled(true);
+    scmConfiguration.load(changes);
+
+    listener.handleEvent(new ScmConfigurationChangedEvent(scmConfiguration));
+    verify(userManager).create(any());
+  }
+
+  @Test
+  void shouldNotCreateAnonymousUserIfAlreadyExists() {
+    when(userManager.contains(any())).thenReturn(true);
+
+    ScmConfiguration changes = new ScmConfiguration();
+    changes.setAnonymousAccessEnabled(true);
+    scmConfiguration.load(changes);
+
+    listener.handleEvent(new ScmConfigurationChangedEvent(scmConfiguration));
+    verify(userManager, never()).create(any());
+  }
+
+  @Test
+  void shouldNotCreateAnonymousUserIfAnonymousAccessDisabled() {
+    ScmConfiguration changes = new ScmConfiguration();
+    changes.setAnonymousAccessEnabled(false);
+    scmConfiguration.load(changes);
+
+    listener.handleEvent(new ScmConfigurationChangedEvent(scmConfiguration));
+    verify(userManager, never()).create(any());
+  }
+
+}