LibJS: Add in-tree test for Json parsing of negative zeros

This mirrors the cases in `built-ins/JSON/parse/text-negative-zero` in test262
Author: https://github.com/ForLoveOfCats Commit: 71ab8fb757 Pull-request: https://github.com/SerenityOS/serenity/pull/12004 Reviewed-by: https://github.com/linusg ✅
2025-06-01 07:52:50 +00:00 · 2022-01-19 11:42:25 -05:00 · 2022-01-19 11:42:25 -05:00 · 71ab8fb757 · 2024-07-17 20:37:18 +09:00
commit 71ab8fb757
parent 1d95fd5443
1 changed files with 8 additions and 0 deletions
--- a/Userland/Libraries/LibJS/Tests/builtins/JSON/JSON.parse.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/JSON/JSON.parse.js
@ -35,3 +35,11 @@ test("syntax errors", () => {
        }).toThrow(SyntaxError);
    });
 });
+
+test("negative zero", () => {
+    ["-0", " \n-0", "-0  \t", "\n\t -0\n   ", "-0.0"].forEach(testCase => {
+        expect(JSON.parse(testCase)).toEqual(-0.0);
+    });
+
+    expect(JSON.parse(-0)).toEqual(0);
+});