improve testing helpers

test/setup-testing.ts

@@ -0,0 +1,44 @@
+import { nextTick } from "node:process"
+import { promisify } from "node:util"
+import type { ReactNode } from "react"
+import { omit } from "../helpers/omit"
+import { Reacord } from "../library/main"
+import { TestAdapter, TestCommandInteraction } from "../library/testing"
+
+const nextTickPromise = promisify(nextTick)
+
+export function setupReacordTesting() {
+  const adapter = new TestAdapter()
+  const reacord = new Reacord({ adapter })
+  const reply = reacord.createCommandReply(new TestCommandInteraction(adapter))
+
+  async function assertMessages(expected: ReturnType<typeof sampleMessages>) {
+    await nextTickPromise() // wait for the render to complete
+    expect(sampleMessages(adapter)).toEqual(expected)
+  }
+
+  async function assertRender(
+    content: ReactNode,
+    expected: ReturnType<typeof sampleMessages>,
+  ) {
+    reply.render(content)
+    await assertMessages(expected)
+  }
+
+  return {
+    reacord,
+    adapter,
+    reply,
+    assertMessages,
+    assertRender,
+  }
+}
+
+function sampleMessages(adapter: TestAdapter) {
+  return adapter.messages.map((message) => ({
+    ...message.options,
+    actionRows: message.options.actionRows.map((row) =>
+      row.map((component) => omit(component, ["customId"])),
+    ),
+  }))
+}