feat(tests): add unit test for useGetNormTableOfContents service func…

…tion

RISDEV-6266

frontend/src/services/normService.spec.ts

@@ -1,4 +1,5 @@
 import { Norm } from "@/types/norm"
+import { TabelOfContentsItem } from "@/types/tableOfContents"
 import { flushPromises } from "@vue/test-utils"
 import { beforeEach, describe, expect, it, vi } from "vitest"
 import { ref } from "vue"
@@ -386,4 +387,90 @@ describe("useNormService", () => {
       )
     })
   })
+
+  describe("useGetNormTableOfContents", () => {
+    beforeEach(() => {
+      vi.resetAllMocks()
+      vi.resetModules()
+    })
+
+    it("fetches the table of contents from the API", async () => {
+      const fixture: TabelOfContentsItem[] = [
+        {
+          id: "1",
+          marker: "§ 1",
+          heading: "Article 1",
+          type: "article",
+          children: [
+            {
+              id: "1.1",
+              marker: "1.",
+              heading: "First Point",
+              type: "section",
+              children: [],
+            },
+            {
+              id: "1.2",
+              marker: "2.",
+              heading: "Second Point",
+              type: "section",
+              children: [],
+            },
+          ],
+        },
+        {
+          id: "2",
+          marker: "§ 2",
+          heading: "Inkrafttreten",
+          type: "article",
+          children: [],
+        },
+      ]
+
+      const useApiFetch = vi.fn().mockReturnValue({
+        data: ref(fixture),
+        json: vi.fn().mockReturnValue({
+          data: ref(fixture),
+        }),
+        execute: vi.fn(),
+      })
+
+      vi.doMock("@/services/apiService", () => ({ useApiFetch }))
+
+      const { useGetNormTableOfContents } = await import("./normService")
+
+      const result = useGetNormTableOfContents("fake/eli")
+      expect(result.data.value).toEqual(fixture)
+
+      vi.doUnmock("@/services/apiService")
+    })
+
+    it("does not load if the ELI has no value", async () => {
+      const fetchSpy = vi
+        .spyOn(window, "fetch")
+        .mockResolvedValue(new Response("[]"))
+
+      const { useGetNormTableOfContents } = await import("./normService")
+
+      const eli = ref("")
+      useGetNormTableOfContents(eli)
+      await flushPromises()
+      expect(fetchSpy).not.toHaveBeenCalled()
+    })
+
+    it("reloads with a new ELI value", async () => {
+      const fetchSpy = vi
+        .spyOn(window, "fetch")
+        .mockResolvedValue(new Response("[]"))
+
+      const { useGetNormTableOfContents } = await import("./normService")
+
+      const eli = ref("fake/eli/1")
+      useGetNormTableOfContents(eli, { immediate: true, refetch: true })
+      await vi.waitFor(() => expect(fetchSpy).toHaveBeenCalledTimes(1))
+
+      eli.value = "fake/eli/2"
+      await vi.waitFor(() => expect(fetchSpy).toHaveBeenCalledTimes(2))
+    })
+  })
 })