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test: add edge-case and rounding coverage #275

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152 changes: 55 additions & 97 deletions src/format.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@ describe('format(number, { long: true })', () => {

it('should support milliseconds', () => {
expect(format(500, { long: true })).toBe('500 ms');

expect(format(-500, { long: true })).toBe('-500 ms');
});

Expand Down Expand Up @@ -51,74 +50,51 @@ describe('format(number, { long: true })', () => {
expect(format(1 * 24 * 60 * 60 * 1200, { long: true })).toBe('1 day');
expect(format(6 * 24 * 60 * 60 * 1000, { long: true })).toBe('6 days');

expect(format(-1 * 1 * 24 * 60 * 60 * 1000, { long: true })).toBe('-1 day');
expect(format(-1 * 1 * 24 * 60 * 60 * 1200, { long: true })).toBe('-1 day');
expect(format(-1 * 6 * 24 * 60 * 60 * 1000, { long: true })).toBe(
'-6 days',
);
expect(format(-1 * 24 * 60 * 60 * 1000, { long: true })).toBe('-1 day');
expect(format(-1 * 24 * 60 * 60 * 1200, { long: true })).toBe('-1 day');
expect(format(-6 * 24 * 60 * 60 * 1000, { long: true })).toBe('-6 days');
});

it('should support weeks', () => {
expect(format(1 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe('1 week');
expect(format(2 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe('2 weeks');

expect(format(-1 * 1 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe(
'-1 week',
);
expect(format(-1 * 2 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe(
'-2 weeks',
);
expect(format(-1 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe('-1 week');
expect(format(-2 * 7 * 24 * 60 * 60 * 1000, { long: true })).toBe('-2 weeks');
});

it('should support months', () => {
expect(format(30.4375 * 24 * 60 * 60 * 1000, { long: true })).toBe(
'1 month',
);
expect(format(30.4375 * 24 * 60 * 60 * 1200, { long: true })).toBe(
'1 month',
);
expect(format(30.4375 * 24 * 60 * 60 * 10000, { long: true })).toBe(
'10 months',
);

expect(format(-1 * 30.4375 * 24 * 60 * 60 * 1000, { long: true })).toBe(
'-1 month',
);
expect(format(-1 * 30.4375 * 24 * 60 * 60 * 1200, { long: true })).toBe(
'-1 month',
);
expect(format(-1 * 30.4375 * 24 * 60 * 60 * 10000, { long: true })).toBe(
'-10 months',
);
expect(format(30.4375 * 24 * 60 * 60 * 1000, { long: true })).toBe('1 month');
expect(format(30.4375 * 24 * 60 * 60 * 1200, { long: true })).toBe('1 month');
expect(format(30.4375 * 24 * 60 * 60 * 10000, { long: true })).toBe('10 months');

expect(format(-30.4375 * 24 * 60 * 60 * 1000, { long: true })).toBe('-1 month');
expect(format(-30.4375 * 24 * 60 * 60 * 1200, { long: true })).toBe('-1 month');
expect(format(-30.4375 * 24 * 60 * 60 * 10000, { long: true })).toBe('-10 months');
});

it('should support years', () => {
expect(format(365.25 * 24 * 60 * 60 * 1000 + 1, { long: true })).toBe(
'1 year',
);
expect(format(365.25 * 24 * 60 * 60 * 1200 + 1, { long: true })).toBe(
'1 year',
);
expect(format(365.25 * 24 * 60 * 60 * 10000 + 1, { long: true })).toBe(
'10 years',
);

expect(format(-1 * 365.25 * 24 * 60 * 60 * 1000 - 1, { long: true })).toBe(
'-1 year',
);
expect(format(-1 * 365.25 * 24 * 60 * 60 * 1200 - 1, { long: true })).toBe(
'-1 year',
);
expect(format(-1 * 365.25 * 24 * 60 * 60 * 10000 - 1, { long: true })).toBe(
'-10 years',
);
expect(format(365.25 * 24 * 60 * 60 * 1000 + 1, { long: true })).toBe('1 year');
expect(format(365.25 * 24 * 60 * 60 * 1200 + 1, { long: true })).toBe('1 year');
expect(format(365.25 * 24 * 60 * 60 * 10000 + 1, { long: true })).toBe('10 years');

expect(format(-365.25 * 24 * 60 * 60 * 1000 - 1, { long: true })).toBe('-1 year');
expect(format(-365.25 * 24 * 60 * 60 * 1200 - 1, { long: true })).toBe('-1 year');
expect(format(-365.25 * 24 * 60 * 60 * 10000 - 1, { long: true })).toBe('-10 years');
});

it('should round', () => {
expect(format(234234234, { long: true })).toBe('3 days');

expect(format(-234234234, { long: true })).toBe('-3 days');
});

it('should handle rounding boundaries', () => {
expect(format(1499, { long: true })).toBe('1 second');
expect(format(1500, { long: true })).toBe('2 seconds');

expect(format(-1499, { long: true })).toBe('-1 second');
expect(format(-1500, { long: true })).toBe('-1 seconds');
});
});

// numbers
Expand All @@ -132,7 +108,6 @@ describe('format(number)', () => {

it('should support milliseconds', () => {
expect(format(500)).toBe('500ms');

expect(format(-500)).toBe('-500ms');
});

Expand All @@ -148,57 +123,56 @@ describe('format(number)', () => {
expect(format(60 * 1000)).toBe('1m');
expect(format(60 * 10000)).toBe('10m');

expect(format(-1 * 60 * 1000)).toBe('-1m');
expect(format(-1 * 60 * 10000)).toBe('-10m');
expect(format(-60 * 1000)).toBe('-1m');
expect(format(-60 * 10000)).toBe('-10m');
});

it('should support hours', () => {
expect(format(60 * 60 * 1000)).toBe('1h');
expect(format(60 * 60 * 10000)).toBe('10h');

expect(format(-1 * 60 * 60 * 1000)).toBe('-1h');
expect(format(-1 * 60 * 60 * 10000)).toBe('-10h');
expect(format(-60 * 60 * 1000)).toBe('-1h');
expect(format(-60 * 60 * 10000)).toBe('-10h');
});

it('should support days', () => {
expect(format(24 * 60 * 60 * 1000)).toBe('1d');
expect(format(24 * 60 * 60 * 6000)).toBe('6d');

expect(format(-1 * 24 * 60 * 60 * 1000)).toBe('-1d');
expect(format(-1 * 24 * 60 * 60 * 6000)).toBe('-6d');
expect(format(-24 * 60 * 60 * 1000)).toBe('-1d');
expect(format(-24 * 60 * 60 * 6000)).toBe('-6d');
});

it('should support weeks', () => {
expect(format(1 * 7 * 24 * 60 * 60 * 1000)).toBe('1w');
expect(format(7 * 24 * 60 * 60 * 1000)).toBe('1w');
expect(format(2 * 7 * 24 * 60 * 60 * 1000)).toBe('2w');

expect(format(-1 * 1 * 7 * 24 * 60 * 60 * 1000)).toBe('-1w');
expect(format(-1 * 2 * 7 * 24 * 60 * 60 * 1000)).toBe('-2w');
expect(format(-7 * 24 * 60 * 60 * 1000)).toBe('-1w');
expect(format(-2 * 7 * 24 * 60 * 60 * 1000)).toBe('-2w');
});

it('should support months', () => {
expect(format(30.4375 * 24 * 60 * 60 * 1000)).toBe('1mo');
expect(format(30.4375 * 24 * 60 * 60 * 1200)).toBe('1mo');
expect(format(30.4375 * 24 * 60 * 60 * 10000)).toBe('10mo');

expect(format(-1 * 30.4375 * 24 * 60 * 60 * 1000)).toBe('-1mo');
expect(format(-1 * 30.4375 * 24 * 60 * 60 * 1200)).toBe('-1mo');
expect(format(-1 * 30.4375 * 24 * 60 * 60 * 10000)).toBe('-10mo');
expect(format(-30.4375 * 24 * 60 * 60 * 1000)).toBe('-1mo');
expect(format(-30.4375 * 24 * 60 * 60 * 1200)).toBe('-1mo');
expect(format(-30.4375 * 24 * 60 * 60 * 10000)).toBe('-10mo');
});

it('should support years', () => {
expect(format(365.25 * 24 * 60 * 60 * 1000 + 1)).toBe('1y');
expect(format(365.25 * 24 * 60 * 60 * 1200 + 1)).toBe('1y');
expect(format(365.25 * 24 * 60 * 60 * 10000 + 1)).toBe('10y');

expect(format(-1 * 365.25 * 24 * 60 * 60 * 1000 - 1)).toBe('-1y');
expect(format(-1 * 365.25 * 24 * 60 * 60 * 1200 - 1)).toBe('-1y');
expect(format(-1 * 365.25 * 24 * 60 * 60 * 10000 - 1)).toBe('-10y');
expect(format(-365.25 * 24 * 60 * 60 * 1000 - 1)).toBe('-1y');
expect(format(-365.25 * 24 * 60 * 60 * 1200 - 1)).toBe('-1y');
expect(format(-365.25 * 24 * 60 * 60 * 10000 - 1)).toBe('-10y');
});

it('should round', () => {
expect(format(234234234)).toBe('3d');

expect(format(-234234234)).toBe('-3d');
});
});
Expand All @@ -207,55 +181,39 @@ describe('format(number)', () => {

describe('format(invalid inputs)', () => {
it('should throw an error, when format("")', () => {
expect(() => {
// @ts-expect-error - We expect this to throw.
format('');
}).toThrow();
// @ts-expect-error
expect(() => format('')).toThrow();
});

it('should throw an error, when format(undefined)', () => {
expect(() => {
// @ts-expect-error - We expect this to throw.
format(undefined);
}).toThrow();
// @ts-expect-error
expect(() => format(undefined)).toThrow();
});

it('should throw an error, when format(null)', () => {
expect(() => {
// @ts-expect-error - We expect this to throw.
format(null);
}).toThrow();
// @ts-expect-error
expect(() => format(null)).toThrow();
});

it('should throw an error, when format([])', () => {
expect(() => {
// @ts-expect-error - We expect this to throw.
format([]);
}).toThrow();
// @ts-expect-error
expect(() => format([])).toThrow();
});

it('should throw an error, when format({})', () => {
expect(() => {
// @ts-expect-error - We expect this to throw.
format({});
}).toThrow();
// @ts-expect-error
expect(() => format({})).toThrow();
});

it('should throw an error, when format(NaN)', () => {
expect(() => {
format(NaN);
}).toThrow();
expect(() => format(NaN)).toThrow();
});

it('should throw an error, when format(Infinity)', () => {
expect(() => {
format(Infinity);
}).toThrow();
expect(() => format(Infinity)).toThrow();
});

it('should throw an error, when format(-Infinity)', () => {
expect(() => {
format(-Infinity);
}).toThrow();
expect(() => format(-Infinity)).toThrow();
});
});
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