refactor(server): canonicalize service API (#31049)

packages/tui/test/prompt/local-attachment.test.ts

@@ -0,0 +1,43 @@
+import { describe, expect, test } from "bun:test"
+import { readLocalAttachment } from "../../src/component/prompt/local-attachment"
+import type { PlatformFiles } from "../../src/platform"
+
+function files(input: { mime: string; text?: string; bytes?: Uint8Array }): PlatformFiles {
+  return {
+    mime: async () => input.mime,
+    readText: async () => input.text ?? "",
+    readBytes: async () => input.bytes ?? new Uint8Array(),
+  }
+}
+
+describe("prompt local attachments", () => {
+  test("reads SVG attachments as text", async () => {
+    expect(await readLocalAttachment(files({ mime: "image/svg+xml", text: "<svg />" }), "/tmp/image.svg")).toEqual({
+      type: "text",
+      mime: "image/svg+xml",
+      content: "<svg />",
+    })
+  })
+
+  test("reads image and PDF attachments as bytes", async () => {
+    const content = new Uint8Array([1, 2, 3])
+    expect(await readLocalAttachment(files({ mime: "application/pdf", bytes: content }), "/tmp/file.pdf")).toEqual({
+      type: "binary",
+      mime: "application/pdf",
+      content,
+    })
+  })
+
+  test("ignores unsupported and unreadable local files", async () => {
+    expect(await readLocalAttachment(files({ mime: "text/plain" }), "/tmp/file.txt")).toBeUndefined()
+    expect(
+      await readLocalAttachment(
+        {
+          ...files({ mime: "image/png" }),
+          readBytes: async () => Promise.reject(new Error("missing")),
+        },
+        "/tmp/missing.png",
+      ),
+    ).toBeUndefined()
+  })
+})