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day-test.js
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day-test.js
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import assert from "assert";
import {timeDay, timeDays, timeYear} from "../src/index.js";
import {local, utc} from "./date.js";
it("timeDays in an alias for timeDay.range", () => {
assert.strictEqual(timeDays, timeDay.range);
});
it("timeDay() is equivalent to timeDay.floor(new Date)", () => {
const t = new Date;
assert.deepStrictEqual(timeDay(), timeDay.floor(t));
});
it("timeDay(date) is equivalent to timeDay.floor(date)", () => {
const t = new Date;
assert.deepStrictEqual(timeDay(t), timeDay.floor(t));
});
it("timeDay.floor(date) returns days", () => {
assert.deepStrictEqual(timeDay.floor(local(2010, 11, 31, 23)), local(2010, 11, 31));
assert.deepStrictEqual(timeDay.floor(local(2011, 0, 1, 0)), local(2011, 0, 1));
assert.deepStrictEqual(timeDay.floor(local(2011, 0, 1, 1)), local(2011, 0, 1));
});
it("timeDay.floor(date) observes daylight saving", () => {
assert.deepStrictEqual(timeDay.floor(utc(2011, 2, 13, 7)), local(2011, 2, 12));
assert.deepStrictEqual(timeDay.floor(utc(2011, 2, 13, 8)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.floor(utc(2011, 2, 13, 9)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.floor(utc(2011, 2, 13, 10)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.floor(utc(2011, 10, 6, 7)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.floor(utc(2011, 10, 6, 8)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.floor(utc(2011, 10, 6, 9)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.floor(utc(2011, 10, 6, 10)), local(2011, 10, 6));
});
it("timeDay.floor(date) handles years in the first century", () => {
assert.deepStrictEqual(timeDay.floor(local(9, 10, 6, 7)), local(9, 10, 6));
});
it("timeDay.round(date) returns days", () => {
assert.deepStrictEqual(timeDay.round(local(2010, 11, 30, 13)), local(2010, 11, 31));
assert.deepStrictEqual(timeDay.round(local(2010, 11, 30, 11)), local(2010, 11, 30));
});
it("timeDay.round(date) observes daylight saving", () => {
assert.deepStrictEqual(timeDay.round(utc(2011, 2, 13, 7)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.round(utc(2011, 2, 13, 8)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.round(utc(2011, 2, 13, 9)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.round(utc(2011, 2, 13, 20)), local(2011, 2, 14));
assert.deepStrictEqual(timeDay.round(utc(2011, 10, 6, 7)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.round(utc(2011, 10, 6, 8)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.round(utc(2011, 10, 6, 9)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.round(utc(2011, 10, 6, 20)), local(2011, 10, 7));
});
it("timeDay.round(date) handles midnight in leap years", () => {
assert.deepStrictEqual(timeDay.round(utc(2012, 2, 1, 0)), local(2012, 2, 1));
assert.deepStrictEqual(timeDay.round(utc(2012, 2, 1, 0)), local(2012, 2, 1));
});
it("timeDay.ceil(date) returns days", () => {
assert.deepStrictEqual(timeDay.ceil(local(2010, 11, 30, 23)), local(2010, 11, 31));
assert.deepStrictEqual(timeDay.ceil(local(2010, 11, 31, 0)), local(2010, 11, 31));
assert.deepStrictEqual(timeDay.ceil(local(2010, 11, 31, 1)), local(2011, 0, 1));
});
it("timeDay.ceil(date) observes start of daylight saving", () => {
assert.deepStrictEqual(timeDay.ceil(utc(2011, 2, 13, 7)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 2, 13, 8)), local(2011, 2, 13));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 2, 13, 9)), local(2011, 2, 14));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 2, 13, 10)), local(2011, 2, 14));
});
it("timeDay.ceil(date) observes end of daylight saving", () => {
assert.deepStrictEqual(timeDay.ceil(utc(2011, 10, 6, 7)), local(2011, 10, 6));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 10, 6, 8)), local(2011, 10, 7));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 10, 6, 9)), local(2011, 10, 7));
assert.deepStrictEqual(timeDay.ceil(utc(2011, 10, 6, 10)), local(2011, 10, 7));
});
it("timeDay.ceil(date) handles midnight for leap years", () => {
assert.deepStrictEqual(timeDay.ceil(utc(2012, 2, 1, 0)), local(2012, 2, 1));
assert.deepStrictEqual(timeDay.ceil(utc(2012, 2, 1, 0)), local(2012, 2, 1));
});
it("timeDay.offset(date) is an alias for timeDay.offset(date, 1)", () => {
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31, 23, 59, 59, 999)), local(2011, 0, 1, 23, 59, 59, 999));
});
it("timeDay.offset(date, step) does not modify the passed-in date", () => {
const d = local(2010, 11, 31, 23, 59, 59, 999);
timeDay.offset(d, +1);
assert.deepStrictEqual(d, local(2010, 11, 31, 23, 59, 59, 999));
});
it("timeDay.offset(date, step) does not round the passed-in date", () => {
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31, 23, 59, 59, 999), +1), local(2011, 0, 1, 23, 59, 59, 999));
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31, 23, 59, 59, 456), -2), local(2010, 11, 29, 23, 59, 59, 456));
});
it("timeDay.offset(date, step) allows step to be negative", () => {
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31), -1), local(2010, 11, 30));
assert.deepStrictEqual(timeDay.offset(local(2011, 0, 1), -2), local(2010, 11, 30));
assert.deepStrictEqual(timeDay.offset(local(2011, 0, 1), -1), local(2010, 11, 31));
});
it("timeDay.offset(date, step) allows step to be positive", () => {
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31), +1), local(2011, 0, 1));
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 30), +2), local(2011, 0, 1));
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 30), +1), local(2010, 11, 31));
});
it("timeDay.offset(date, step) allows step to be zero", () => {
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31, 23, 59, 59, 999), 0), local(2010, 11, 31, 23, 59, 59, 999));
assert.deepStrictEqual(timeDay.offset(local(2010, 11, 31, 23, 59, 58, 0), 0), local(2010, 11, 31, 23, 59, 58, 0));
});
it("timeDay.range(start, stop) returns days between start (inclusive) and stop (exclusive)", () => {
assert.deepStrictEqual(timeDay.range(local(2011, 10, 4), local(2011, 10, 10)), [
local(2011, 10, 4),
local(2011, 10, 5),
local(2011, 10, 6),
local(2011, 10, 7),
local(2011, 10, 8),
local(2011, 10, 9)
]);
});
it("timeDay.range(start, stop) returns days", () => {
assert.deepStrictEqual(timeDay.range(local(2011, 10, 4, 2), local(2011, 10, 10, 13)), [
local(2011, 10, 5),
local(2011, 10, 6),
local(2011, 10, 7),
local(2011, 10, 8),
local(2011, 10, 9),
local(2011, 10, 10)
]);
});
it("timeDay.range(start, stop) coerces start and stop to dates", () => {
assert.deepStrictEqual(timeDay.range(+local(2011, 10, 4), +local(2011, 10, 7)), [
local(2011, 10, 4),
local(2011, 10, 5),
local(2011, 10, 6)
]);
});
it("timeDay.range(start, stop) returns the empty array for invalid dates", () => {
assert.deepStrictEqual(timeDay.range(new Date(NaN), Infinity), []);
});
it("timeDay.range(start, stop) returns the empty array if start >= stop", () => {
assert.deepStrictEqual(timeDay.range(local(2011, 10, 10), local(2011, 10, 4)), []);
assert.deepStrictEqual(timeDay.range(local(2011, 10, 10), local(2011, 10, 10)), []);
});
it("timeDay.range(start, stop, step) returns every step day", () => {
assert.deepStrictEqual(timeDay.range(local(2011, 10, 4, 2), local(2011, 10, 14, 13), 3), [
local(2011, 10, 5),
local(2011, 10, 8),
local(2011, 10, 11),
local(2011, 10, 14)
]);
});
it("timeDay.range(start, stop, step) returns the empty array if step is zero, negative or NaN", () => {
assert.deepStrictEqual(timeDay.range(local(2011, 0, 1, 0), local(2011, 4, 9, 0), 0), []);
assert.deepStrictEqual(timeDay.range(local(2011, 0, 1, 0), local(2011, 4, 9, 0), -1), []);
assert.deepStrictEqual(timeDay.range(local(2011, 0, 1, 0), local(2011, 4, 9, 0), 0.5), []);
assert.deepStrictEqual(timeDay.range(local(2011, 0, 1, 0), local(2011, 4, 9, 0), NaN), []);
});
it("timeDay.count(start, end) counts days after start (exclusive) and before end (inclusive)", () => {
assert.strictEqual(timeDay.count(local(2011, 0, 1, 0), local(2011, 4, 9, 0)), 128);
assert.strictEqual(timeDay.count(local(2011, 0, 1, 1), local(2011, 4, 9, 0)), 128);
assert.strictEqual(timeDay.count(local(2010, 11, 31, 23), local(2011, 4, 9, 0)), 129);
assert.strictEqual(timeDay.count(local(2011, 0, 1, 0), local(2011, 4, 8, 23)), 127);
assert.strictEqual(timeDay.count(local(2011, 0, 1, 0), local(2011, 4, 9, 1)), 128);
});
it("timeDay.count(start, end) observes daylight saving", () => {
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 2, 13, 1)), 71);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 2, 13, 3)), 71);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 2, 13, 4)), 71);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 10, 6, 0)), 309);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 10, 6, 1)), 309);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 10, 6, 2)), 309);
});
it("timeDay.count(start, stop) does not exhibit floating-point rounding error", () => {
const date = new Date(2011, 4, 9);
assert.strictEqual(timeDay.count(timeYear(date), date), 128);
});
it("timeDay.count(start, end) returns 364 or 365 for a full year", () => {
assert.strictEqual(timeDay.count(local(1999, 0, 1), local(1999, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2000, 0, 1), local(2000, 11, 31)), 365); // leap year
assert.strictEqual(timeDay.count(local(2001, 0, 1), local(2001, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2002, 0, 1), local(2002, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2003, 0, 1), local(2003, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2004, 0, 1), local(2004, 11, 31)), 365); // leap year
assert.strictEqual(timeDay.count(local(2005, 0, 1), local(2005, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2006, 0, 1), local(2006, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2007, 0, 1), local(2007, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2008, 0, 1), local(2008, 11, 31)), 365); // leap year
assert.strictEqual(timeDay.count(local(2009, 0, 1), local(2009, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2010, 0, 1), local(2010, 11, 31)), 364);
assert.strictEqual(timeDay.count(local(2011, 0, 1), local(2011, 11, 31)), 364);
});
it("timeDay.every(step) returns every stepth day without resetting on the first of the month", () => {
assert.deepStrictEqual(timeDay.every(3).range(local(2008, 11, 30, 0, 12), local(2009, 0, 5, 23, 48)), [local(2008, 11, 31), local(2009, 0, 3)]);
assert.deepStrictEqual(timeDay.every(5).range(local(2008, 11, 25, 0, 12), local(2009, 0, 6, 23, 48)), [local(2008, 11, 27), local(2009, 0, 1), local(2009, 0, 6)]);
assert.deepStrictEqual(timeDay.every(7).range(local(2008, 11, 23, 0, 12), local(2009, 0, 8, 23, 48)), [local(2008, 11, 25), local(2009, 0, 1), local(2009, 0, 8)]);
});