update

docs/__tests__/pluginHooks.test.js

@@ -0,0 +1,23 @@
+const fs = require('fs');
+const path = require('path');
+const loadPlugins = require('../src/config/loadPlugins');
+
+test('plugin hook modifies data', async () => {
+  const dir = fs.mkdtempSync(path.join(require('os').tmpdir(), 'plugins-'));
+  const pluginFile = path.join(dir, 'test.plugin.js');
+  fs.writeFileSync(
+    pluginFile,
+    "module.exports = { onParseMarkdown: ({ content }) => ({ content: content + '!!' }) };\n"
+  );
+
+  const plugins = loadPlugins({ pluginsDir: dir, plugins: ['test.plugin'] });
+  let data = { content: 'hello' };
+  for (const plugin of plugins) {
+    if (typeof plugin.onParseMarkdown === 'function') {
+      const res = await plugin.onParseMarkdown(data);
+      if (res !== undefined) data = res;
+    }
+  }
+  expect(data.content).toBe('hello!!');
+  fs.rmSync(dir, { recursive: true, force: true });
+});