Add tests

packages/content-handler/src/medium-handler.ts

@@ -0,0 +1,21 @@
+import { ContentHandler, PreHandleResult } from './index'
+
+class MediumHandler extends ContentHandler {
+  shouldPreHandle(url: string, dom?: Document): boolean {
+    const u = new URL(url)
+    return u.hostname.endsWith('medium.com')
+  }
+
+  async preHandle(url: string, document?: Document): Promise<PreHandleResult> {
+    console.log('prehandling medium url', url)
+
+    try {
+      const res = new URL(url)
+      res.searchParams.delete('source')
+      return Promise.resolve({ url: res.toString() })
+    } catch (error) {
+      console.error('error prehandling medium url', error)
+      throw error
+    }
+  }
+}