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test(validators): add spec file for date validator #713

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179 changes: 179 additions & 0 deletions src/common/validators/date.validator.spec.ts
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Original file line number Diff line number Diff line change
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import { validate } from 'class-validator';
import { IsFutureDate } from './date.validator';

class TestModel {
@IsFutureDate()
date?: unknown;

constructor(date?: unknown) {
this.date = date;
}
}

class CustomMessageModel {
@IsFutureDate({ message: 'Custom deadline must be in the future' })
deadline?: unknown;

constructor(deadline?: unknown) {
this.deadline = deadline;
}
}

describe('IsFutureDate validator', () => {
describe('future dates', () => {
it('accepts a date string in the future', async () => {
const futureDate = new Date(
Date.now() + 1000 * 60 * 60 * 24,
).toISOString();
const model = new TestModel(futureDate);
const errors = await validate(model);
expect(errors.length).toBe(0);
});

it('accepts a future date string specified far in the future', async () => {
const farFutureDate = new Date(
Date.now() + 1000 * 60 * 60 * 24 * 365,
).toISOString();
const model = new TestModel(farFutureDate);
const errors = await validate(model);
expect(errors.length).toBe(0);
});
});

describe('past dates', () => {
it('rejects a date string in the past', async () => {
const model = new TestModel('2020-01-01T00:00:00.000Z');
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});

it('rejects a relative past date', async () => {
const pastDate = new Date(Date.now() - 1000 * 60).toISOString();
const model = new TestModel(pastDate);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});
});

describe('current date / now', () => {
afterEach(() => {
jest.useRealTimers();
});

it('rejects a date equal to the current time', async () => {
const fixedNow = new Date('2026-06-01T12:00:00.000Z');
jest.useFakeTimers();
jest.setSystemTime(fixedNow);

const model = new TestModel(fixedNow.toISOString());
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});
});

describe('invalid date strings', () => {
it('rejects an empty string', async () => {
const model = new TestModel('');
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});

it('rejects a malformed date string', async () => {
const model = new TestModel('not-a-valid-date');
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});
});

describe('non-string values', () => {
it('rejects undefined', async () => {
const model = new TestModel(undefined);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'date must be a date strictly in the future',
);
});

it('rejects null', async () => {
const model = new TestModel(null);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
});

it('rejects a number', async () => {
const model = new TestModel(1700000000000);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
});

it('rejects a Date object', async () => {
const futureDateObj = new Date(Date.now() + 1000 * 60 * 60 * 24);
const model = new TestModel(futureDateObj);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
});

it('rejects a boolean', async () => {
const model = new TestModel(true);
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
});

it('rejects an object', async () => {
const model = new TestModel({ date: '2099-01-01' });
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'date');
expect(error).toBeDefined();
});
});

describe('custom validation options', () => {
it('uses custom error message if provided', async () => {
const model = new CustomMessageModel('2020-01-01T00:00:00.000Z');
const errors = await validate(model);
expect(errors.length).toBeGreaterThan(0);
const error = errors.find((e) => e.property === 'deadline');
expect(error).toBeDefined();
expect(error?.constraints?.isFutureDate).toBe(
'Custom deadline must be in the future',
);
});
});
});