build(fe-tooling): set up vitest to replace jest et al.

fix: include mocha types

fix: missing vitest import

fix: missing vitest import

frontend/jest.config.js

@@ -1,9 +0,0 @@
-/** @type {import('ts-jest').JestConfigWithTsJest} */
-module.exports = {
-	preset: "ts-jest",
-	testEnvironment: "jsdom",
-	setupFilesAfterEnv: ["./src/tests/testSetup.ts"],
-	transform: {
-		"^.+\\.(ts|tsx)$": "ts-jest",
-	},
-}

frontend/package.json

@@ -15,7 +15,7 @@
     "build": "vite build ./src",
     "lint": "biome check src *.js --verbose && biome format src *.js --verbose",
     "lint:fix": "biome check src ./*.js --apply --verbose && biome format src ./*.js --write --verbose",
-    "test": "yarn jest",
+    "test": "yarn vitest run src",
     "typecheck": "yarn tsc --noEmit"
   },
   "devDependencies": {
@@ -24,20 +24,19 @@
     "@testing-library/jest-dom": "^6.1.5",
     "@testing-library/react": "^14.1.2",
     "@testing-library/user-event": "^14.5.1",
-    "@types/jest": "^29.5.3",
+    "@types/mocha": "^10.0.6",
     "@types/node": "^20.10.6",
     "@types/react": "^18.2.18",
     "@types/react-dom": "^18.2.7",
     "@vitejs/plugin-basic-ssl": "^1.0.2",
     "@vitejs/plugin-legacy": "^5.2.0",
-    "@vitejs/plugin-react": "^4.2.1",
     "axios-mock-adapter": "^1.21.5",
     "buffer": "^5.5.0||^6.0.0",
-    "jest": "^29.7.0",
+    "jsdom": "^23.0.1",
-    "jest-environment-jsdom": "^29.7.0",
     "process": "^0.11.10",
-    "ts-jest": "^29.1.1",
+    "terser": "^5.26.0",
     "typescript": "^5.3.0",
-    "vite": "^5.0.10"
+    "vite": "^5.0.10",
+    "vitest": "^1.1.0"
   }
 }

frontend/src/components/FileDetails/FileDetails.test.tsx

@@ -1,3 +1,4 @@
+import { vi, expect, describe, it } from "vitest"
 import { act } from "@testing-library/react"
 import { within } from "@testing-library/dom"
 import userEvent from "@testing-library/user-event"
@@ -19,9 +20,9 @@ describe("FileDetails", () => {
 		size: 1,
 		id: "b61bf93d-a9db-473e-822e-a65003b1b7e3",
 	}
-	test("Clicking the download button trigger a file download", async () => {
+	it("Clicking the download button trigger a file download", async () => {
 		// FIXME: Validating file downloads is ... tricky. The current interaction with dynamically created DOM
-		// elements is not visible by jest.
+		// elements is not visible by vi.
 
 		const expectedUrlPattern = new RegExp(`/files/${mockItem.id}/content/$`)
 
@@ -29,12 +30,10 @@ describe("FileDetails", () => {
 
 		axiosMock.onGet(expectedUrlPattern).reply(200, mockItem)
 
-		jest
+		vi.spyOn(fileQueries, "useFileDetails").mockReturnValue({
-			.spyOn(fileQueries, "useFileDetails")
+			data: mockItem,
-			.mockReturnValue({ data: mockItem, isLoading: false } as UseQueryResult<
+			isLoading: false,
-				FileData,
+		} as UseQueryResult<FileData, unknown>)
-				unknown
-			>)
 		const user = userEvent.setup()
 
 		const { getByLabelText, debug, rerender } = render(
@@ -54,19 +53,17 @@ describe("FileDetails", () => {
 		expect(downloadRequest.url).toMatch(expectedUrlPattern)
 	})
 
-	test("Clicking the delete button fires request to delete file", async () => {
+	it("Clicking the delete button fires request to delete file", async () => {
 		const expectedUrlPattern = new RegExp(`/files/${mockItem.id}/$`)
 
 		const axiosMock = getAxiosMockAdapter()
 
 		axiosMock.onDelete(expectedUrlPattern).reply(200, mockItem)
 
-		jest
+		vi.spyOn(fileQueries, "useFileDetails").mockReturnValue({
-			.spyOn(fileQueries, "useFileDetails")
+			data: mockItem,
-			.mockReturnValue({ data: mockItem, isLoading: false } as UseQueryResult<
+			isLoading: false,
-				FileData,
+		} as UseQueryResult<FileData, unknown>)
-				unknown
-			>)
 		const user = userEvent.setup()
 
 		const { getByLabelText, debug, rerender } = render(
@@ -86,22 +83,20 @@ describe("FileDetails", () => {
 		expect(deleteRequest.url).toMatch(expectedUrlPattern)
 	})
 
-	test("Clicking the delete button redirects to the file list after success", async () => {
+	it("Clicking the delete button redirects to the file list after success", async () => {
 		const expectedUrlPattern = new RegExp(`/files/${mockItem.id}/$`)
 
 		const axiosMock = getAxiosMockAdapter()
 
 		axiosMock.onDelete(expectedUrlPattern).reply(200, mockItem)
 
-		jest
+		vi.spyOn(fileQueries, "useFileDetails").mockReturnValue({
-			.spyOn(fileQueries, "useFileDetails")
+			data: mockItem,
-			.mockReturnValue({ data: mockItem, isLoading: false } as UseQueryResult<
+			isLoading: false,
-				FileData,
+		} as UseQueryResult<FileData, unknown>)
-				unknown
-			>)
 
-		const navigateMock = jest.fn().mockImplementation((a: string) => {})
+		const navigateMock = vi.fn().mockImplementation((a: string) => {})
-		jest.spyOn(locationContextUtils, "useLocationContext").mockReturnValue({
+		vi.spyOn(locationContextUtils, "useLocationContext").mockReturnValue({
 			location: {
 				path: "",
 				label: null,

frontend/src/components/FileList/FileList.test.tsx

@@ -1,3 +1,4 @@
+import { expect, describe, it, vi } from "vitest"
 import { within } from "@testing-library/dom"
 import userEvent from "@testing-library/user-event"
 
@@ -28,14 +29,14 @@ describe("FileList", () => {
 		{ title: "Async Item 0", filename: "async.txt", size: 2, type: "upload" },
 	]
 
-	test("Renders list items provided", () => {
+	it("Renders list items provided", () => {
 		const { getAllByText } = render(<FileList data={mockItems} />)
 		const renderedItems = getAllByText(/Item/)
 
 		expect(renderedItems.length).toEqual(mockItems.length)
 	})
 
-	test("Prepends items in flight as tracked by async task context", () => {
+	it("Prepends items in flight as tracked by async task context", () => {
 		const { getAllByText, getByText } = render(
 			<FileList data={[mockItems[0]]} />,
 			{ asyncTaskContext: mockAsyncTasks },
@@ -50,7 +51,7 @@ describe("FileList", () => {
 	})
 
 	describe("FileListItem", () => {
-		test("Renders the item title", () => {
+		it("Renders the item title", () => {
 			const { getByLabelText, debug } = render(
 				<FileList data={[mockItems[0]]} />,
 			)
@@ -58,7 +59,7 @@ describe("FileList", () => {
 			within(title).getByText(mockItems[0].title)
 		})
 
-		test("Renders the item size", () => {
+		it("Renders the item size", () => {
 			const { getByLabelText, debug } = render(
 				<FileList data={[mockItems[0]]} />,
 			)
@@ -66,7 +67,7 @@ describe("FileList", () => {
 			within(title).getByText(`${mockItems[0].size} B`)
 		})
 
-		test.each(["download item", "delete item"])(
+		it.each(["download item", "delete item"])(
 			"Renders secondary action buttons (%s)",
 			(action) => {
 				const { getByLabelText, debug } = render(
@@ -76,7 +77,7 @@ describe("FileList", () => {
 			},
 		)
 
-		test("Clicking the delete button fires request to delete file", async () => {
+		it("Clicking the delete button fires request to delete file", async () => {
 			const expectedUrlPattern = new RegExp(`/files/${mockItems[0].id}/$`)
 
 			const axiosMock = getAxiosMockAdapter()
@@ -101,9 +102,9 @@ describe("FileList", () => {
 			expect(deleteRequest.url).toMatch(expectedUrlPattern)
 		})
 
-		test("Clicking the download button trigger a file download", async () => {
+		it("Clicking the download button trigger a file download", async () => {
 			// FIXME: Validating file downloads is ... tricky. The current interaction with dynamically created DOM
-			// elements is not visible by jest.
+			// elements is not visible by vi.
 			const expectedUrlPattern = new RegExp(
 				`/files/${mockItems[0].id}/content/$`,
 			)

frontend/src/components/FileListView/FileListView.test.tsx

@@ -1,3 +1,4 @@
+import { vi, expect, describe, it, afterEach } from "vitest"
 import { render, screen, waitFor } from "@testing-library/react"
 import { QueryClientProvider, QueryClient } from "@tanstack/react-query"
 import AxiosMockAdapter from "axios-mock-adapter"
@@ -21,11 +22,11 @@ function renderComponent() {
 
 describe("FileListView", () => {
 	afterEach(() => {
-		jest.resetAllMocks()
+		vi.resetAllMocks()
 	})
 
 	it("renders no sidebar if no item is in the path", async () => {
-		jest.spyOn(globalThis, "location", "get").mockReturnValue({
+		vi.spyOn(globalThis, "location", "get").mockReturnValue({
 			...globalThis.location,
 			pathname: "/",
 		})
@@ -54,7 +55,7 @@ describe("FileListView", () => {
 
 	it("renders a sidebar if an item is selected", async () => {
 		const mockItemId = "b61bf93d-a9db-473e-822e-a65003b1b7e3"
-		jest.spyOn(globalThis, "location", "get").mockReturnValue({
+		vi.spyOn(globalThis, "location", "get").mockReturnValue({
 			...globalThis.location,
 			pathname: `/item/${mockItemId}/`,
 		})

frontend/src/components/LoginView/LoginView.test.tsx

@@ -1,3 +1,5 @@
+import { expect, describe, it, vi } from "vitest"
+
 import { render, screen, waitFor } from "@testing-library/react"
 import userEvent from "@testing-library/user-event"
 import { QueryClientProvider, QueryClient } from "@tanstack/react-query"
@@ -41,7 +43,7 @@ describe("LoginView", () => {
 	})
 
 	it("renders a registration link", async () => {
-		const mock = jest.fn()
+		const mock = vi.fn()
 		const { user } = renderComponent()
 
 		expect(screen.getByText(/don\'t have an account yet?/i)).toBeInTheDocument()
@@ -113,8 +115,8 @@ describe("LoginView", () => {
 	})
 
 	it("redirects the user on success", async () => {
-		const mockNavigate = jest.fn()
+		const mockNavigate = vi.fn()
-		const mockLocationHook = jest
+		const mockLocationHook = vi
 			.spyOn(locationHook, "useLocationContext")
 			.mockImplementation(() => ({
 				location: {

frontend/src/components/NavigationBar/NavigationBar.test.tsx

@@ -1,3 +1,4 @@
+import { vi, it, describe, expect } from "vitest"
 import { within } from "@testing-library/dom"
 import userEvent from "@testing-library/user-event"
 
@@ -11,12 +12,12 @@ import { type FileData } from "../../types/files"
 
 describe("NavigationBar", () => {
 	describe("Upload functionality", () => {
-		test("Renders the upload button", () => {
+		it("Renders the upload button", () => {
 			const { getByText } = render(<NavigationBar />)
 			getByText("Upload file")
 		})
 
-		test("Clicking the upload button and selecting a file POSTs the file", async () => {
+		it("Clicking the upload button and selecting a file POSTs the file", async () => {
 			const axiosMock = getAxiosMockAdapter()
 			const expectedUrlPattern = new RegExp("/files/$")
 			axiosMock.onPost(expectedUrlPattern).reply(200, {

frontend/src/components/RegisterView/RegisterView.test.tsx

@@ -1,3 +1,4 @@
+import { expect, it, vi, describe } from "vitest"
 import { screen, render, waitFor } from "@testing-library/react"
 import userEvent from "@testing-library/user-event"
 import { QueryClientProvider, QueryClient } from "@tanstack/react-query"

frontend/src/components/RegisterView/validation.test.ts

@@ -1,3 +1,4 @@
+import { describe, it, expect } from "vitest"
 import { validateEmail, validatePassword } from "./validation"
 
 describe("Email address format validation", () => {

frontend/src/components/TextInput/TextInput.test.tsx

@@ -1,3 +1,4 @@
+import { describe, it, expect, vi } from "vitest"
 import React from "react"
 import { screen, render, waitFor } from "@testing-library/react"
 import userEvent from "@testing-library/user-event"
@@ -46,7 +47,7 @@ function renderComponent(props?: Partial<TextInputProps>) {
 
 describe("TextInput", () => {
 	it("runs the provided onChange on input", async () => {
-		const mockOnChange = jest.fn()
+		const mockOnChange = vi.fn()
 		const mockInput = "testinput"
 
 		const { user } = renderComponent({ onChange: mockOnChange })

frontend/src/router/Route.test.tsx

@@ -1,3 +1,5 @@
+import React from "react"
+import { describe, expect, it } from "vitest"
 import { render, screen } from "@testing-library/react"
 
 import Route from "./Route"

frontend/src/router/Router.test.tsx

@@ -1,3 +1,4 @@
+import { afterEach, describe, it, vi, expect } from "vitest"
 import { render, screen } from "@testing-library/react"
 
 import { LocationContext } from "../contexts/LocationContext"
@@ -10,17 +11,17 @@ function renderComponent(component: React.ReactElement) {
 
 describe("Router", () => {
 	afterEach(() => {
-		jest.resetAllMocks()
+		vi.resetAllMocks()
 	})
 
 	it("throws an error if no Route exists for the given location", () => {
-		jest.spyOn(globalThis, "location", "get").mockReturnValue({
+		vi.spyOn(globalThis, "location", "get").mockReturnValue({
 			...globalThis.location,
 			pathname: "/doesnotexist",
 		})
 
 		// Silence the error to avoid logspam in tests.
-		jest.spyOn(console, "error").mockImplementation(() => {})
+		vi.spyOn(console, "error").mockImplementation(() => {})
 
 		expect(() =>
 			renderComponent(
@@ -34,7 +35,7 @@ describe("Router", () => {
 	})
 
 	it("renders the route matching the given location", () => {
-		jest.spyOn(globalThis, "location", "get").mockReturnValue({
+		vi.spyOn(globalThis, "location", "get").mockReturnValue({
 			...globalThis.location,
 			pathname: "/exists",
 		})
@@ -51,7 +52,7 @@ describe("Router", () => {
 	})
 
 	it("only renders the route that matches", () => {
-		jest.spyOn(globalThis, "location", "get").mockReturnValue({
+		vi.spyOn(globalThis, "location", "get").mockReturnValue({
 			...globalThis.location,
 			pathname: "/matches",
 		})

frontend/src/tests/testSetup.ts

@@ -1,9 +1,10 @@
+import { vi } from "vitest"
 import "@testing-library/jest-dom"
 
 // URL.createObjectURL does not exist in jest-jsdom.
-globalThis.URL.createObjectURL = jest
+globalThis.URL.createObjectURL = vi
 	.fn()
 	.mockImplementation(() => "http://localhost/downloadUrl")
 
 // Clicking DOM objects is not implemented in jest-jsdom.
-HTMLAnchorElement.prototype.click = jest.fn()
+HTMLAnchorElement.prototype.click = vi.fn()

frontend/tsconfig.json

@@ -11,6 +11,6 @@
         "strict": true,
         "noImplicitAny": true,
         "skipLibCheck": true,
-        "types": ["jest", "node"]
+        "types": ["node", "mocha"]
     }
 }

frontend/vite.config.js

@@ -1,14 +1,19 @@
-import legacy from '@vitejs/plugin-legacy'
+import legacy from "@vitejs/plugin-legacy"
-import react from '@vitejs/plugin-react'
+import basicSSL from "@vitejs/plugin-basic-ssl"
-import basicSSL from '@vitejs/plugin-basic-ssl'
 
-import { defineConfig } from 'vite'
+import { defineConfig } from "vite"
 
 export default defineConfig({
-    plugins: [legacy(), react(), basicSSL()],
+	plugins: [legacy(), basicSSL()],
-    server: {
+	server: {
-        port: 1234,
+		port: 1234,
-        strictPort: true,
+		strictPort: true,
-        https: false
+		https: false,
-    }
+	},
+	test: {
+		environment: "jsdom",
+		setupFiles: ["./src/tests/testSetup.ts"],
+		testMatch: ["./src/**/*.test.tsx?"],
+		globals: true,
+	},
 })