124 lines
4.1 KiB
TypeScript

import { $ } from "bun"
import { afterEach, describe, expect, test } from "bun:test"
import fs from "fs/promises"
import path from "path"
import { Effect, Layer, ManagedRuntime } from "effect"
import { tmpdir } from "../fixture/fixture"
import { watcherConfigLayer, withServices } from "../fixture/instance"
import { FileWatcher } from "../../src/file/watcher"
import { Instance } from "../../src/project/instance"
import { GlobalBus } from "../../src/bus/global"
import { Vcs } from "../../src/project/vcs"
// Skip in CI — native @parcel/watcher binding needed
const describeVcs = FileWatcher.hasNativeBinding() && !process.env.CI ? describe : describe.skip
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
function withVcs(
directory: string,
body: (rt: ManagedRuntime.ManagedRuntime<FileWatcher.Service | Vcs.Service, never>) => Promise<void>,
) {
return withServices(
directory,
Layer.merge(FileWatcher.layer, Vcs.layer),
async (rt) => {
await rt.runPromise(FileWatcher.Service.use(() => Effect.void))
await rt.runPromise(Vcs.Service.use(() => Effect.void))
await Bun.sleep(500)
await body(rt)
},
{ provide: [watcherConfigLayer] },
)
}
type BranchEvent = { directory?: string; payload: { type: string; properties: { branch?: string } } }
/** Wait for a Vcs.Event.BranchUpdated event on GlobalBus, with retry polling as fallback */
function nextBranchUpdate(directory: string, timeout = 10_000) {
return new Promise<string | undefined>((resolve, reject) => {
let settled = false
const timer = setTimeout(() => {
if (settled) return
settled = true
GlobalBus.off("event", on)
reject(new Error("timed out waiting for BranchUpdated event"))
}, timeout)
function on(evt: BranchEvent) {
if (evt.directory !== directory) return
if (evt.payload.type !== Vcs.Event.BranchUpdated.type) return
if (settled) return
settled = true
clearTimeout(timer)
GlobalBus.off("event", on)
resolve(evt.payload.properties.branch)
}
GlobalBus.on("event", on)
})
}
// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------
describeVcs("Vcs", () => {
afterEach(() => Instance.disposeAll())
test("branch() returns current branch name", async () => {
await using tmp = await tmpdir({ git: true })
await withVcs(tmp.path, async (rt) => {
const branch = await rt.runPromise(Vcs.Service.use((s) => s.branch()))
expect(branch).toBeDefined()
expect(typeof branch).toBe("string")
})
})
test("branch() returns undefined for non-git directories", async () => {
await using tmp = await tmpdir()
await withVcs(tmp.path, async (rt) => {
const branch = await rt.runPromise(Vcs.Service.use((s) => s.branch()))
expect(branch).toBeUndefined()
})
})
test("publishes BranchUpdated when .git/HEAD changes", async () => {
await using tmp = await tmpdir({ git: true })
const branch = `test-${Math.random().toString(36).slice(2)}`
await $`git branch ${branch}`.cwd(tmp.path).quiet()
await withVcs(tmp.path, async () => {
const pending = nextBranchUpdate(tmp.path)
const head = path.join(tmp.path, ".git", "HEAD")
await fs.writeFile(head, `ref: refs/heads/${branch}\n`)
const updated = await pending
expect(updated).toBe(branch)
})
})
test("branch() reflects the new branch after HEAD change", async () => {
await using tmp = await tmpdir({ git: true })
const branch = `test-${Math.random().toString(36).slice(2)}`
await $`git branch ${branch}`.cwd(tmp.path).quiet()
await withVcs(tmp.path, async (rt) => {
const pending = nextBranchUpdate(tmp.path)
const head = path.join(tmp.path, ".git", "HEAD")
await fs.writeFile(head, `ref: refs/heads/${branch}\n`)
await pending
const current = await rt.runPromise(Vcs.Service.use((s) => s.branch()))
expect(current).toBe(branch)
})
})
})