test: port instance HttpApi path/vcs read coverage to Effect

packages/opencode/src/pty/input.ts

@@ -0,0 +1,24 @@
+import { Effect } from "effect"
+
+const inputDecoder = new TextDecoder("utf-8", { fatal: true })
+
+export function handlePtyInput(
+  handler: { onMessage: (message: string | ArrayBuffer) => void },
+  message: string | Uint8Array,
+) {
+  if (typeof message === "string") {
+    handler.onMessage(message)
+    return Effect.void
+  }
+  return Effect.try({
+    try: () => inputDecoder.decode(message),
+    catch: () => new Error("invalid PTY websocket input"),
+  }).pipe(
+    Effect.catch(() => Effect.succeed(undefined)),
+    Effect.flatMap((decoded) => {
+      if (decoded === undefined) return Effect.void
+      handler.onMessage(decoded)
+      return Effect.void
+    }),
+  )
+}