Pretty formatter for `Headers` & `URLSearchParams` (#3081)

* Pretty formatter for `Headers` & `URLSearchParams`

* cleanup

* console.log on Headers, FormData, URLSearchParams will always quote the keys now

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 39 insertions, 2 deletions

diff --git a/test/js/web/fetch/headers.test.ts b/test/js/web/fetch/headers.test.ts
index 48cd3ad35..8ae17c11e 100644
--- a/test/js/web/fetch/headers.test.ts
+++ b/test/js/web/fetch/headers.test.ts
@@ -412,10 +412,46 @@ describe("Headers", () => {
       ]);
     });
   });
-  describe("toJSON()", () => {
+  describe("Bun.inspect()", () => {
     const it = "toJSON" in new Headers() ? test : test.skip;
     it("can convert to json when empty", () => {
       const headers = new Headers();
+      expect(Bun.inspect(headers)).toStrictEqual(`Headers {}`);
+    });
+    it("can convert to json", () => {
+      const headers = new Headers({
+        "cache-control": "public, immutable",
+      });
+      expect(Bun.inspect(headers)).toStrictEqual(
+        "Headers {" + "\n  " + `"cache-control": "public, immutable"` + "\n" + "}",
+      );
+    });
+    it("can convert to json normalized", () => {
+      const headers = new Headers({
+        "user-agent": "bun",
+        "X-Custom-Header": "1",
+        "cache-control": "public, immutable",
+      });
+      expect(Bun.inspect(headers)).toStrictEqual(
+        "Headers " +
+          JSON.stringify(
+            {
+              "user-agent": "bun",
+              "cache-control": "public, immutable",
+              "x-custom-header": "1",
+            },
+            null,
+            2,
+          ),
+      );
+    });
+  });
+  describe("toJSON()", () => {
+    // @ts-ignore
+    const it = new Headers()?.toJSON ? test : test.skip;
+
+    it("can convert to json when empty", () => {
+      const headers = new Headers();
       expect(headers.toJSON()).toStrictEqual({});
     });
     it("can convert to json", () => {
@@ -440,7 +476,8 @@ describe("Headers", () => {
     });
   });
   describe("count", () => {
-    const it = "count" in new Headers() ? test : test.skip;
+    // @ts-ignore
+    const it = typeof new Headers()?.count !== "undefined" ? test : test.skip;
     it("can count headers when empty", () => {
       const headers = new Headers();
       expect(headers.count).toBe(0);