1 files changed, 66 insertions, 0 deletions
diff --git a/test/js/web/fetch/fetch_headers.test.js b/test/js/web/fetch/fetch_headers.test.js
new file mode 100644
index 000000000..cd2786c08
--- /dev/null
+++ b/test/js/web/fetch/fetch_headers.test.js
@@ -0,0 +1,66 @@
+import { describe, it, expect, beforeAll, afterAll } from "bun:test";
+const port = 3009;
+const url = `http://localhost:${port}`;
+let server;
+
+describe("Headers", async () => {
+  // Start up a single server and reuse it between tests
+  beforeAll(() => {
+    server = Bun.serve({
+      fetch(req) {
+        const hdr = req.headers.get("x-test");
+        return new Response(hdr);
+      },
+      port: port,
+    });
+  });
+  afterAll(() => {
+    server.stop();
+  });
+
+  it("Headers should work", async () => {
+    expect(await fetchContent({ "x-test": "header 1" })).toBe("header 1");
+  });
+
+  it("Header names must be valid", async () => {
+    expect(() => fetch(url, { headers: { "a\tb:c": "foo" } })).toThrow("Invalid header name: 'a\tb:c'");
+    expect(() => fetch(url, { headers: { "❤️": "foo" } })).toThrow("Invalid header name: '❤️'");
+  });
+
+  it("Header values must be valid", async () => {
+    expect(() => fetch(url, { headers: { "x-test": "\0" } })).toThrow("Header 'x-test' has invalid value: '\0'");
+    expect(() => fetch(url, { headers: { "x-test": "❤️" } })).toThrow("Header 'x-test' has invalid value: '❤️'");
+  });
+
+  it("repro 1602", async () => {
+    const origString = "😂1234".slice(3);
+
+    var encoder = new TextEncoder();
+    var decoder = new TextDecoder();
+    const roundTripString = decoder.decode(encoder.encode(origString));
+
+    expect(roundTripString).toBe(origString);
+
+    // This one will pass
+    expect(await fetchContent({ "x-test": roundTripString })).toBe(roundTripString);
+    // This would hang
+    expect(await fetchContent({ "x-test": origString })).toBe(origString);
+  });
+
+  describe("toJSON()", () => {
+    it("should provide lowercase header names", () => {
+      const headers1 = new Headers({ "X-Test": "yep", "Content-Type": "application/json" });
+      expect(headers1.toJSON()).toEqual({ "x-test": "yep", "content-type": "application/json" });
+
+      const headers2 = new Headers();
+      headers2.append("X-Test", "yep");
+      headers2.append("Content-Type", "application/json");
+      expect(headers2.toJSON()).toEqual({ "x-test": "yep", "content-type": "application/json" });
+    });
+  });
+});
+
+async function fetchContent(headers) {
+  const res = await fetch(url, { headers: headers }, { verbose: true });
+  return await res.text();
+}