fix(cli/fetch): set null body for null-body status (#5980)

1 files changed, 38 insertions, 0 deletions

diff --git a/cli/tests/unit/fetch_test.ts b/cli/tests/unit/fetch_test.ts
index 5fd1cc469..c1dde92a9 100644
--- a/cli/tests/unit/fetch_test.ts
+++ b/cli/tests/unit/fetch_test.ts
@@ -713,3 +713,41 @@ unitTest(
     await res.body.cancel();
   }
 );
+
+unitTest(
+  { perms: { net: true } },
+  async function fetchNullBodyStatus(): Promise<void> {
+    const nullBodyStatus = [204, 205, 304];
+
+    for (const status of nullBodyStatus) {
+      const headers = new Headers([["x-status", String(status)]]);
+      const res = await fetch("http://localhost:4545/cli/tests/echo_server", {
+        body: "deno",
+        method: "POST",
+        headers,
+      });
+      assertEquals(res.body, null);
+      assertEquals(res.status, status);
+    }
+  }
+);
+
+unitTest(
+  { perms: { net: true } },
+  function fetchResponseConstructorNullBody(): void {
+    const nullBodyStatus = [204, 205, 304];
+
+    for (const status of nullBodyStatus) {
+      try {
+        new Response("deno", { status });
+        fail("Response with null body status cannot have body");
+      } catch (e) {
+        assert(e instanceof TypeError);
+        assertEquals(
+          e.message,
+          "Response with null body status cannot have body"
+        );
+      }
+    }
+  }
+);