Converted @rollup/html to a standalone package (out of the original monorepo) and made it ESM-native

test/util/test.d.ts

@@ -0,0 +1,45 @@
+/* eslint-disable import/no-extraneous-dependencies */
+import type { RollupBuild, OutputOptions, OutputChunk, OutputAsset } from 'rollup';
+import type { Assertions } from 'ava';
+
+interface GetCode {
+  (bundle: RollupBuild, outputOptions?: OutputOptions | null, allFiles?: false): Promise<string>;
+  (bundle: RollupBuild, outputOptions: OutputOptions | null | undefined, allFiles: true): Promise<
+    Array<{
+      code: OutputChunk['code'] | undefined;
+      fileName: OutputChunk['fileName'] | OutputAsset['fileName'];
+      source: OutputAsset['source'] | undefined;
+    }>
+  >;
+}
+
+export const getCode: GetCode;
+
+export function getFiles(
+  bundle: RollupBuild,
+  outputOptions?: OutputOptions
+): Promise<
+  {
+    fileName: string;
+    content: any;
+  }[]
+>;
+
+export function evaluateBundle(bundle: RollupBuild): Promise<Pick<NodeModule, 'exports'>>;
+
+export function getImports(bundle: RollupBuild): Promise<string[]>;
+
+export function getResolvedModules(bundle: RollupBuild): Promise<Record<string, string>>;
+
+export function onwarn(warning: string | any): void;
+
+export function testBundle(
+  t: Assertions,
+  bundle: RollupBuild,
+  options: { inject: Record<string, any>; options: Record<string, any> }
+): Promise<{
+  code: string;
+  error?: any;
+  result?: any;
+  module: Pick<NodeModule, 'exports'>;
+}>;