unit(validator): make validator to check if role is the only role

server/validators/manager/is_the_only_role_to_any_user.spec.ts

@@ -0,0 +1,50 @@
+import type { Request } from "!/types/dependent"
+
+import "~/set-ups/database.set_up"
+import Factory from "~/factories/role"
+import Manager from "%/managers/role"
+import UserFactory from "~/factories/user"
+import makeInitialState from "!/validators/make_initial_state"
+import IsTheOnlyRoleToAnyUser from "./is_the_only_role_to_any_user"
+
+describe("Validator: Is the only role to any user", () => {
+	it("can accept valid input", async() => {
+		const model = await new Factory().insertOne()
+		await new UserFactory().attach(model).insertOne()
+		const value = Promise.resolve(makeInitialState(model.id))
+		const constraints = {
+			"field": "hello",
+			"manager": {
+				"className": Manager,
+				"columnName": "id"
+			},
+			"request": {} as Request,
+			"source": null
+		}
+
+		const sanitizeValue = (await IsTheOnlyRoleToAnyUser(value, constraints)).value
+
+		expect(sanitizeValue).toEqual(model.id)
+	})
+
+	it("cannot accept invalid value", async() => {
+		const model = await new Factory().insertOne()
+		const otherModel = await new Factory().insertOne()
+		await new UserFactory().attach(model).attach(otherModel).insertOne()
+		const value = Promise.resolve(makeInitialState(model.id))
+		const constraints = {
+			"field": "hello",
+			"manager": {
+				"className": Manager,
+				"columnName": "id"
+			},
+			"request": {} as Request,
+			"source": null
+		}
+
+		const error = IsTheOnlyRoleToAnyUser(value, constraints)
+
+		expect(error).rejects.toHaveProperty("field", "hello")
+		expect(error).rejects.toHaveProperty("messageMaker")
+	})
+})