Expose deno.ErrorKind

Originally we planned to have a JS class for each error code. But it
seems better to just have a single DenoError class with a "kind"
property. One nice thing about using an enum instead of classes for
errors is that switch() can be used during error handling instead of a
bunch of instanceof branches.

1 files changed, 2 insertions, 3 deletions

diff --git a/js/fetch_test.ts b/js/fetch_test.ts
index 88cf834bc..1af3bc2eb 100644
--- a/js/fetch_test.ts
+++ b/js/fetch_test.ts
@@ -15,7 +15,6 @@ test(async function fetchPerm() {
   } catch (err_) {
     err = err_;
   }
-  // TODO assert(err instanceof deno.PermissionDenied).
-  assert(err);
-  assertEqual(err.name, "deno.PermissionDenied");
+  assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
+  assertEqual(err.name, "PermissionDenied");
 });