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bus-effect.test.ts
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162 lines (135 loc) · 5.35 KB
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import { describe, expect } from "bun:test"
import { Deferred, Effect, Layer, Stream } from "effect"
import z from "zod"
import { Bus } from "../../src/bus"
import { BusEvent } from "../../src/bus/bus-event"
import { Instance } from "../../src/project/instance"
import * as CrossSpawnSpawner from "../../src/effect/cross-spawn-spawner"
import { provideInstance, provideTmpdirInstance, tmpdirScoped } from "../fixture/fixture"
import { testEffect } from "../lib/effect"
const TestEvent = {
Ping: BusEvent.define("test.effect.ping", z.object({ value: z.number() })),
Pong: BusEvent.define("test.effect.pong", z.object({ message: z.string() })),
}
const node = CrossSpawnSpawner.defaultLayer
const live = Layer.mergeAll(Bus.layer, node)
const it = testEffect(live)
describe("Bus (Effect-native)", () => {
it.live("publish + subscribe stream delivers events", () =>
provideTmpdirInstance(() =>
Effect.gen(function* () {
const bus = yield* Bus.Service
const received: number[] = []
const done = yield* Deferred.make<void>()
yield* Stream.runForEach(bus.subscribe(TestEvent.Ping), (evt) =>
Effect.sync(() => {
received.push(evt.properties.value)
if (received.length === 2) Deferred.doneUnsafe(done, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Effect.sleep("10 millis")
yield* bus.publish(TestEvent.Ping, { value: 1 })
yield* bus.publish(TestEvent.Ping, { value: 2 })
yield* Deferred.await(done)
expect(received).toEqual([1, 2])
}),
),
)
it.live("subscribe filters by event type", () =>
provideTmpdirInstance(() =>
Effect.gen(function* () {
const bus = yield* Bus.Service
const pings: number[] = []
const done = yield* Deferred.make<void>()
yield* Stream.runForEach(bus.subscribe(TestEvent.Ping), (evt) =>
Effect.sync(() => {
pings.push(evt.properties.value)
Deferred.doneUnsafe(done, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Effect.sleep("10 millis")
yield* bus.publish(TestEvent.Pong, { message: "ignored" })
yield* bus.publish(TestEvent.Ping, { value: 42 })
yield* Deferred.await(done)
expect(pings).toEqual([42])
}),
),
)
it.live("subscribeAll receives all types", () =>
provideTmpdirInstance(() =>
Effect.gen(function* () {
const bus = yield* Bus.Service
const types: string[] = []
const done = yield* Deferred.make<void>()
yield* Stream.runForEach(bus.subscribeAll(), (evt) =>
Effect.sync(() => {
types.push(evt.type)
if (types.length === 2) Deferred.doneUnsafe(done, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Effect.sleep("10 millis")
yield* bus.publish(TestEvent.Ping, { value: 1 })
yield* bus.publish(TestEvent.Pong, { message: "hi" })
yield* Deferred.await(done)
expect(types).toContain("test.effect.ping")
expect(types).toContain("test.effect.pong")
}),
),
)
it.live("multiple subscribers each receive the event", () =>
provideTmpdirInstance(() =>
Effect.gen(function* () {
const bus = yield* Bus.Service
const a: number[] = []
const b: number[] = []
const doneA = yield* Deferred.make<void>()
const doneB = yield* Deferred.make<void>()
yield* Stream.runForEach(bus.subscribe(TestEvent.Ping), (evt) =>
Effect.sync(() => {
a.push(evt.properties.value)
Deferred.doneUnsafe(doneA, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Stream.runForEach(bus.subscribe(TestEvent.Ping), (evt) =>
Effect.sync(() => {
b.push(evt.properties.value)
Deferred.doneUnsafe(doneB, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Effect.sleep("10 millis")
yield* bus.publish(TestEvent.Ping, { value: 99 })
yield* Deferred.await(doneA)
yield* Deferred.await(doneB)
expect(a).toEqual([99])
expect(b).toEqual([99])
}),
),
)
it.live("subscribeAll stream sees InstanceDisposed on disposal", () =>
Effect.gen(function* () {
const dir = yield* tmpdirScoped()
const types: string[] = []
const seen = yield* Deferred.make<void>()
const disposed = yield* Deferred.make<void>()
// Set up subscriber inside the instance
yield* Effect.gen(function* () {
const bus = yield* Bus.Service
yield* Stream.runForEach(bus.subscribeAll(), (evt) =>
Effect.sync(() => {
types.push(evt.type)
if (evt.type === TestEvent.Ping.type) Deferred.doneUnsafe(seen, Effect.void)
if (evt.type === Bus.InstanceDisposed.type) Deferred.doneUnsafe(disposed, Effect.void)
}),
).pipe(Effect.forkScoped)
yield* Effect.sleep("10 millis")
yield* bus.publish(TestEvent.Ping, { value: 1 })
yield* Deferred.await(seen)
}).pipe(provideInstance(dir))
// Dispose from OUTSIDE the instance scope
yield* Effect.promise(() => Instance.disposeAll())
yield* Deferred.await(disposed).pipe(Effect.timeout("2 seconds"))
expect(types).toContain("test.effect.ping")
expect(types).toContain(Bus.InstanceDisposed.type)
}),
)
})