test: port node-fetch

index.js

@@ -84,7 +84,25 @@ function makeDispatcher (fn) {
 module.exports.setGlobalDispatcher = setGlobalDispatcher
 module.exports.getGlobalDispatcher = getGlobalDispatcher
 
-module.exports.fetch = makeDispatcher(api.fetch)
+if (api.fetch) {
+  const _fetch = makeDispatcher(api.fetch)
+  module.exports.fetch = async function fetch (...args) {
+    try {
+      return await _fetch(...args)
+    } catch (err) {
+      // TODO (fix): This is a little weird. Spec compliant?
+      if (err.code === 'ERR_INVALID_URL') {
+        const er = new TypeError('Invalid URL')
+        er.cause = err
+        throw er
+      }
+      throw err
+    }
+  }
+  module.exports.Headers = api.fetch.Headers
+  module.exports.Response = api.fetch.Response
+}
+
 module.exports.request = makeDispatcher(api.request)
 module.exports.stream = makeDispatcher(api.stream)
 module.exports.pipeline = makeDispatcher(api.pipeline)