1 files changed, 64 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Object/Object.entries.js b/Userland/Libraries/LibJS/Tests/builtins/Object/Object.entries.js
new file mode 100644
index 0000000000..c8ed8ffc4c
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Object/Object.entries.js
@@ -0,0 +1,64 @@
+describe("basic functionality", () => {
+    test("length", () => {
+        expect(Object.entries).toHaveLength(1);
+        expect(Object.entries(true)).toHaveLength(0);
+        expect(Object.entries(45)).toHaveLength(0);
+        expect(Object.entries(-998)).toHaveLength(0);
+        expect(Object.entries("abcd")).toHaveLength(4);
+        expect(Object.entries([1, 2, 3])).toHaveLength(3);
+        expect(Object.entries({ a: 1, b: 2, c: 3 })).toHaveLength(3);
+    });
+
+    test("entries with object", () => {
+        let entries = Object.entries({ foo: 1, bar: 2, baz: 3 });
+
+        expect(entries).toEqual([
+            ["foo", 1],
+            ["bar", 2],
+            ["baz", 3],
+        ]);
+    });
+
+    test("entries with objects with symbol keys", () => {
+        let entries = Object.entries({ foo: 1, [Symbol("bar")]: 2, baz: 3 });
+
+        expect(entries).toEqual([
+            ["foo", 1],
+            ["baz", 3],
+        ]);
+    });
+
+    test("entries with array", () => {
+        entries = Object.entries(["a", "b", "c"]);
+        expect(entries).toEqual([
+            ["0", "a"],
+            ["1", "b"],
+            ["2", "c"],
+        ]);
+    });
+
+    test("ignores non-enumerable properties", () => {
+        let obj = { foo: 1 };
+        Object.defineProperty(obj, "getFoo", {
+            value: function () {
+                return this.foo;
+            },
+        });
+        let entries = Object.entries(obj);
+        expect(entries).toEqual([["foo", 1]]);
+    });
+});
+
+describe("errors", () => {
+    test("null argument", () => {
+        expect(() => {
+            Object.entries(null);
+        }).toThrowWithMessage(TypeError, "ToObject on null or undefined");
+    });
+
+    test("undefined argument", () => {
+        expect(() => {
+            Object.entries(undefined);
+        }).toThrowWithMessage(TypeError, "ToObject on null or undefined");
+    });
+});