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LibJS: Implement Temporal.Instant.prototype.subtract()

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This commit is contained in:
Linus Groh 2021-08-07 00:38:21 +01:00
parent b38f1fb071
commit 6852ba4d34
4 changed files with 87 additions and 0 deletions
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59
Userland/Libraries/LibJS/Tests/builtins/Temporal/Instant/Instant.prototype.subtract.js Normal file
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describe("correct behavior", () => {
test("length is 1", () => {
expect(Temporal.Instant.prototype.subtract).toHaveLength(1);
});
test("basic functionality", () => {
const instant = new Temporal.Instant(1625614921000000000n);
const duration = new Temporal.Duration(0, 0, 0, 0, 1, 2, 3, 4, 5, 6);
expect(instant.subtract(duration).epochNanoseconds).toBe(1625611197995994994n);
});
});
describe("errors", () => {
test("this value must be a Temporal.Instant object", () => {
expect(() => {
Temporal.Instant.prototype.subtract.call("foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.Instant");
});
test("invalid nanoseconds value, positive", () => {
const instant = new Temporal.Instant(8_640_000_000_000_000_000_000n);
const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, -1);
expect(() => {
instant.subtract(duration);
}).toThrowWithMessage(
RangeError,
"Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17"
);
});
test("invalid nanoseconds value, negative", () => {
const instant = new Temporal.Instant(-8_640_000_000_000_000_000_000n);
const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
expect(() => {
instant.subtract(duration);
}).toThrowWithMessage(
RangeError,
"Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17"
);
});
test("disallowed fields", () => {
const instant = new Temporal.Instant(1625614921000000000n);
for (const [args, property] of [
[[123, 0, 0, 0], "years"],
[[0, 123, 0, 0], "months"],
[[0, 0, 123, 0], "weeks"],
[[0, 0, 0, 123], "days"],
]) {
const duration = new Temporal.Duration(...args);
expect(() => {
instant.subtract(duration);
}).toThrowWithMessage(
RangeError,
`Invalid value for duration property '${property}': must be zero, got 123`
);
}
});
});