[test] Fix flaky backend coverage

Signed-off-by: Florian ROUËNÉ <[email protected]>

packages/formdescriptioneditors/backend/sirius-components-collaborative-formdescriptioneditors/src/test/java/org/eclipse/sirius/components/collaborative/formdescriptioneditors/handlers/DeleteGroupEventHandlerTests.java

@@ -0,0 +1,102 @@
+/*******************************************************************************
+ * Copyright (c) 2024 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.components.collaborative.formdescriptioneditors.handlers;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.eclipse.sirius.components.collaborative.api.ChangeDescription;
+import org.eclipse.sirius.components.collaborative.api.ChangeKind;
+import org.eclipse.sirius.components.collaborative.formdescriptioneditors.FormDescriptionEditorContext;
+import org.eclipse.sirius.components.collaborative.formdescriptioneditors.TestFormDescriptionEditorBuilder;
+import org.eclipse.sirius.components.collaborative.formdescriptioneditors.api.IFormDescriptionEditorContext;
+import org.eclipse.sirius.components.collaborative.formdescriptioneditors.dto.DeleteGroupInput;
+import org.eclipse.sirius.components.collaborative.formdescriptioneditors.messages.ICollaborativeFormDescriptionEditorMessageService;
+import org.eclipse.sirius.components.core.api.IEditService;
+import org.eclipse.sirius.components.core.api.IEditingContext;
+import org.eclipse.sirius.components.core.api.IObjectService;
+import org.eclipse.sirius.components.core.api.IPayload;
+import org.eclipse.sirius.components.core.api.SuccessPayload;
+import org.eclipse.sirius.components.formdescriptioneditors.FormDescriptionEditor;
+import org.eclipse.sirius.components.view.form.FormDescription;
+import org.eclipse.sirius.components.view.form.FormFactory;
+import org.eclipse.sirius.components.view.form.GroupDescription;
+import org.eclipse.sirius.components.view.form.PageDescription;
+import org.junit.jupiter.api.Test;
+
+import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
+import reactor.core.publisher.Sinks;
+
+/**
+ * Tests of the delete group event handler.
+ *
+ * @author frouene
+ */
+public class DeleteGroupEventHandlerTests {
+
+    private static final String GROUP_ID = "groupId";
+
+    @Test
+    public void testDeleteGroup() {
+
+        FormDescription formDescription = FormFactory.eINSTANCE.createFormDescription();
+        PageDescription pageDescription = FormFactory.eINSTANCE.createPageDescription();
+        formDescription.getPages().add(pageDescription);
+        GroupDescription groupDescription = FormFactory.eINSTANCE.createGroupDescription();
+        pageDescription.getGroups().add(groupDescription);
+
+        FormDescriptionEditor formDescriptionEditor = new TestFormDescriptionEditorBuilder().getFormDescriptionEditor(UUID.randomUUID().toString());
+
+        var objectService = new IObjectService.NoOp() {
+            @Override
+            public Optional<Object> getObject(IEditingContext editingContext, String objectId) {
+                Optional<Object> result = Optional.empty();
+                if (GROUP_ID.equals(objectId)) {
+                    result = Optional.of(groupDescription);
+                }
+                return result;
+            }
+        };
+        AtomicBoolean groupDeleted = new AtomicBoolean(false);
+        IEditService.NoOp editService = new IEditService.NoOp() {
+            @Override
+            public void delete(Object object) {
+                if (object == groupDescription) {
+                    groupDeleted.set(true);
+                }
+            }
+        };
+
+        var handler = new DeleteGroupEventHandler(objectService, editService, new ICollaborativeFormDescriptionEditorMessageService.NoOp(), new SimpleMeterRegistry());
+        var input = new DeleteGroupInput(UUID.randomUUID(), "editingContextId", "representationId", GROUP_ID);
+
+        assertThat(handler.canHandle(input)).isTrue();
+
+        Sinks.One<IPayload> payloadSink = Sinks.one();
+        Sinks.Many<ChangeDescription> changeDescriptionSink = Sinks.many().unicast().onBackpressureBuffer();
+        IFormDescriptionEditorContext formDescriptionEditorContext = new FormDescriptionEditorContext(formDescriptionEditor);
+
+        handler.handle(payloadSink, changeDescriptionSink, new IEditingContext.NoOp(), formDescriptionEditorContext, input);
+
+        ChangeDescription changeDescription = changeDescriptionSink.asFlux().blockFirst();
+        assertThat(changeDescription.getKind()).isEqualTo(ChangeKind.SEMANTIC_CHANGE);
+
+        IPayload payload = payloadSink.asMono().block();
+        assertThat(payload).isInstanceOf(SuccessPayload.class);
+        assertThat(groupDeleted).isTrue();
+
+    }
+}