Add support for fetch() headers (#727)

1 files changed, 17 insertions, 0 deletions

diff --git a/js/fetch_test.ts b/js/fetch_test.ts
index 1af3bc2eb..2b7f32099 100644
--- a/js/fetch_test.ts
+++ b/js/fetch_test.ts
@@ -18,3 +18,20 @@ test(async function fetchPerm() {
   assertEqual(err.kind, deno.ErrorKind.PermissionDenied);
   assertEqual(err.name, "PermissionDenied");
 });
+
+testPerm({ net: true }, async function fetchHeaders() {
+  const response = await fetch("http://localhost:4545/package.json");
+  const headers = response.headers;
+  assertEqual(headers.get("Content-Type"), "application/json");
+  assert(headers.get("Server").startsWith("SimpleHTTP"));
+});
+
+test(async function headersAppend() {
+  let err;
+  try {
+    const headers = new Headers([["foo", "bar", "baz"]]);
+  } catch (e) {
+    err = e;
+  }
+  assert(err instanceof TypeError);
+});