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LibJS: Add Object.{keys,values,entries}()

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mattco98 2020-04-29 18:59:23 -07:00 • committed by Andreas Kling
parent 36a5e0be4b
commit 683a0696f3
7 changed files with 250 additions and 0 deletions
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54
Libraries/LibJS/Tests/Object.entries.js Normal file
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@ -0,0 +1,54 @@
load("test-common.js");
try {
assert(Object.entries.length === 1);
assert(Object.entries(true).length === 0);
assert(Object.entries(45).length === 0);
assert(Object.entries(-998).length === 0);
assert(Object.entries("abcd").length === 4);
assert(Object.entries([1, 2, 3]).length === 3);
assert(Object.entries({ a: 1, b: 2, c: 3 }).length === 3);
assertThrowsError(() => {
Object.entries(null);
}, {
error: TypeError,
message: "ToObject on null or undefined.",
});
assertThrowsError(() => {
Object.entries(undefined);
}, {
error: TypeError,
message: "ToObject on null or undefined.",
});
let entries = Object.entries({ foo: 1, bar: 2, baz: 3 });
assert(
entries.length === 3 && entries[0].length === 2 &&
entries[1].length === 2 && entries[2].length === 2 &&
entries[0][0] === "foo" && entries[0][1] === 1 &&
entries[1][0] === "bar" && entries[1][1] === 2 &&
entries[2][0] === "baz" && entries[2][1] === 3
);
entries = Object.entries(["a", "b", "c"]);
assert(
entries.length === 3 && entries[0].length === 2 &&
entries[1].length === 2 && entries[2].length === 2 &&
entries[0][0] === "0" && entries[0][1] === "a" &&
entries[1][0] === "1" && entries[1][1] === "b" &&
entries[2][0] === "2" && entries[2][1] === "c"
);
let obj = { foo: 1 };
Object.defineProperty(obj, "getFoo", {
value: function() { return this.foo; },
});
let entries = Object.entries(obj);
assert(entries.length === 1 && entries[0][0] === "foo" && entries[0][1] === 1);
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}