diff --git a/apps/client/src/test/easy-froca.ts b/apps/client/src/test/easy-froca.ts
index 045819ab5..c282baf23 100644
--- a/apps/client/src/test/easy-froca.ts
+++ b/apps/client/src/test/easy-froca.ts
@@ -3,6 +3,7 @@ import FNote from "../entities/fnote.js";
 import froca from "../services/froca.js";
 import FAttribute from "../entities/fattribute.js";
 import noteAttributeCache from "../services/note_attribute_cache.js";
+import FBranch from "../entities/fbranch.js";
 
 type AttributeDefinitions = { [key in `#${string}`]: string; };
 type RelationDefinitions = { [key in `~${string}`]: string; };
@@ -10,6 +11,7 @@ type RelationDefinitions = { [key in `~${string}`]: string; };
 interface NoteDefinition extends AttributeDefinitions, RelationDefinitions {
     id?: string | undefined;
     title: string;
+    children?: NoteDefinition[];
 }
 
 /**
@@ -47,6 +49,24 @@ export function buildNote(noteDef: NoteDefinition) {
         blobId: ""
     });
     froca.notes[note.noteId] = note;
+    let childNotePosition = 0;
+
+    if (noteDef.children) {
+        for (const childDef of noteDef.children) {
+            const childNote = buildNote(childDef);
+            const branchId = `${note.noteId}_${childNote.noteId}`;
+            const branch = new FBranch(froca, {
+                branchId,
+                noteId: childNote.noteId,
+                parentNoteId: note.noteId,
+                notePosition: childNotePosition,
+                fromSearchNote: false
+            });
+            froca.branches[branchId] = branch;
+            note.addChild(childNote.noteId, branchId, false);
+            childNotePosition += 10;
+        }
+    }
 
     let position = 0;
     for (const [ key, value ] of Object.entries(noteDef)) {
diff --git a/apps/client/src/widgets/collections/presentation/model.spec.ts b/apps/client/src/widgets/collections/presentation/model.spec.ts
new file mode 100644
index 000000000..59e9707f7
--- /dev/null
+++ b/apps/client/src/widgets/collections/presentation/model.spec.ts
@@ -0,0 +1,62 @@
+import { beforeAll, describe, expect, it } from "vitest";
+import { buildNote } from "../../../test/easy-froca";
+import FNote from "../../../entities/fnote";
+import { buildPresentationModel, PresentationModel } from "./model";
+
+let presentationNote!: FNote;
+let data!: PresentationModel;
+
+describe("Presentation model", () => {
+    beforeAll(async () => {
+        presentationNote = buildNote({
+            title: "Presentation",
+            "#viewType": "presentation",
+            "children": [
+                {
+                    id: "slide1",
+                    title: "First slide",
+                    children: [
+                        {
+                            id: "slide2",
+                            title: "First-sub"
+                        }
+                    ]
+                },
+                {
+                    title: "Second slide",
+                    id: "slide3",
+                    children: [
+                        {
+                            id: "slide4",
+                            title: "Second-sub"
+                        }
+                    ]
+                }
+            ]
+        });
+        data = await buildPresentationModel(presentationNote);
+    });
+
+    it("it correctly maps horizontal and vertical slides", () => {
+        expect(data).toMatchObject({
+            slides: [
+                {
+                    noteId: "slide1",
+                    verticalSlides: [
+                        {
+                            noteId: "slide2"
+                        }
+                    ]
+                },
+                {
+                    noteId: "slide3",
+                    verticalSlides: [
+                        {
+                            noteId: "slide4"
+                        }
+                    ]
+                }
+            ]
+        })
+    });
+});