refactor(server): split HttpApi exercise harness (#26385)

packages/opencode/test/server/httpapi-exercise/backend.ts

@@ -0,0 +1,83 @@
+import { Flag } from "@opencode-ai/core/flag/flag"
+import { ConfigProvider, Effect, Layer } from "effect"
+import { HttpRouter } from "effect/unstable/http"
+import { parse } from "./assertions"
+import { runtime, type Runtime } from "./runtime"
+import type { ActiveScenario, Backend, BackendApp, CallResult, CaptureMode, SeededContext } from "./types"
+
+export function call(backend: Backend, scenario: ActiveScenario, ctx: SeededContext<unknown>) {
+  return Effect.promise(async () =>
+    capture(await app(await runtime(), backend).request(toRequest(scenario, ctx)), scenario.capture),
+  )
+}
+
+const appCache: Partial<Record<Backend, BackendApp>> = {}
+
+function app(modules: Runtime, backend: Backend) {
+  Flag.OPENCODE_EXPERIMENTAL_HTTPAPI = backend === "effect"
+  Flag.OPENCODE_SERVER_PASSWORD = undefined
+  Flag.OPENCODE_SERVER_USERNAME = undefined
+  if (appCache[backend]) return appCache[backend]
+  if (backend === "legacy") {
+    const legacy = modules.Server.Legacy().app
+    return (appCache.legacy = {
+      request: (input, init) => legacy.request(input, init),
+    })
+  }
+
+  const handler = HttpRouter.toWebHandler(
+    modules.ExperimentalHttpApiServer.routes.pipe(
+      Layer.provide(
+        ConfigProvider.layer(
+          ConfigProvider.fromUnknown({ OPENCODE_SERVER_PASSWORD: undefined, OPENCODE_SERVER_USERNAME: undefined }),
+        ),
+      ),
+    ),
+    { disableLogger: true },
+  ).handler
+  return (appCache.effect = {
+    request(input: string | URL | Request, init?: RequestInit) {
+      return handler(
+        input instanceof Request ? input : new Request(new URL(input, "http://localhost"), init),
+        modules.ExperimentalHttpApiServer.context,
+      )
+    },
+  })
+}
+
+function toRequest(scenario: ActiveScenario, ctx: SeededContext<unknown>) {
+  const spec = scenario.request(ctx, ctx.state)
+  return new Request(new URL(spec.path, "http://localhost"), {
+    method: scenario.method,
+    headers: spec.body === undefined ? spec.headers : { "content-type": "application/json", ...spec.headers },
+    body: spec.body === undefined ? undefined : JSON.stringify(spec.body),
+  })
+}
+
+async function capture(response: Response, mode: CaptureMode): Promise<CallResult> {
+  const text = mode === "stream" ? await captureStream(response) : await response.text()
+  return {
+    status: response.status,
+    contentType: response.headers.get("content-type") ?? "",
+    text,
+    body: parse(text),
+  }
+}
+
+async function captureStream(response: Response) {
+  if (!response.body) return ""
+  const reader = response.body.getReader()
+  const read = reader.read().then(
+    (result) => ({ result }),
+    (error: unknown) => ({ error }),
+  )
+  const winner = await Promise.race([read, Bun.sleep(1_000).then(() => ({ timeout: true }))])
+  if ("timeout" in winner) {
+    await reader.cancel("timed out waiting for stream chunk").catch(() => undefined)
+    throw new Error("timed out waiting for stream chunk")
+  }
+  if ("error" in winner) throw winner.error
+  await reader.cancel().catch(() => undefined)
+  if (winner.result.done) return ""
+  return new TextDecoder().decode(winner.result.value)
+}