Test project instance after leaving

[EvanHahn]

We don't test what happens when someone leaves a project, then tries to perform certain operations on it. This test may uncover bugs or missing features, which we should fix.

[EvanHahn]

This looks like it was mostly done already:

mapeo-core-next/test-e2e/project-leave.js

Lines 221 to 303 in c8dbdc3

	test('Data access after leaving project', async (t) => {
	const managers = await createManagers(3, t)
	connectPeers(managers)
	await waitForPeers(managers)
	const [creator, coordinator, member] = managers
	const projectId = await creator.createProject({ name: 'mapeo' })
	await Promise.all([
	invite({
	invitor: creator,
	invitees: [coordinator],
	projectId,
	roleId: COORDINATOR_ROLE_ID,
	}),
	invite({
	invitor: creator,
	invitees: [member],
	projectId,
	roleId: MEMBER_ROLE_ID,
	}),
	])
	const projects = await Promise.all(
	managers.map((m) => m.getProject(projectId))
	)
	const [, coordinatorProject, memberProject] = projects
	await memberProject.observation.create({
	schemaName: 'observation',
	attachments: [],
	tags: {},
	refs: [],
	metadata: {},
	})
	t.ok(
	(await memberProject.observation.getMany()).length >= 1,
	'Test is set up correctly'
	)
	await waitForSync(projects, 'initial')
	await Promise.all([
	coordinator.leaveProject(projectId),
	member.leaveProject(projectId),
	])
	await waitForSync(projects, 'initial')
	await t.exception(async () => {
	await memberProject.observation.create({
	schemaName: 'observation',
	attachments: [],
	tags: {},
	refs: [],
	metadata: {},
	})
	}, 'member cannot create new data after leaving')
	await t.exception(
	() => memberProject.observation.getMany(),
	"Shouldn't be able to fetch observations after leaving"
	)
	t.alike(
	await memberProject.$getProjectSettings(),
	MapeoProject.EMPTY_PROJECT_SETTINGS,
	'member getting project settings returns empty settings'
	)
	t.alike(
	await coordinatorProject.$getProjectSettings(),
	MapeoProject.EMPTY_PROJECT_SETTINGS,
	'coordinator getting project settings returns empty settings'
	)
	await t.exception(async () => {
	await coordinatorProject.$setProjectSettings({ name: 'foo' })
	}, 'coordinator cannot update project settings after leaving')
	await disconnectPeers(managers)
	})

I'm sure there's more we can test but I think this is done for now.