datetime-duration-challenge/tests/Unit/CalculateDurationTest.php

<?php

namespace Tests\Unit;

use App\Enums\DurationModifier;
use App\Services\CalculateDuration;
use DateTimeImmutable;
use DateTimeInterface;
use PHPUnit\Framework\TestCase;

class CalculateDurationTest extends TestCase
{
    public function testCanCalculateDurationBetweenTwoDates(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-17T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result();

        $this->assertSame(17, $result->days);
        $this->assertSame(2, $result->weeks);
        $this->assertSame(12, $result->weekDays);
    }

    public function testCanCalculateDurationBetweenTwoDatesCloseToOverThreeWeeks(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-21T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result();

        $this->assertSame(21, $result->days);
        $this->assertSame(2, $result->weeks);
        $this->assertSame(15, $result->weekDays);
    }

    public function testCanCalculateDurationBetweenTwoDatesInDifferentTimezones(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00-12:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-21T00:00:00+14:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result();

        $this->assertSame(20, $result->days);
        $this->assertSame(2, $result->weeks);
        $this->assertSame(14, $result->weekDays);
    }

    public function testCanCalculateDurationBetweenAndDisplayAsSeconds(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-8T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result(DurationModifier::Second);

        // 8 * 60 * 60 * 24
        $this->assertSame(691200, $result->days);

        // 5 * 60 * 60 * 24
        $this->assertSame(518400, $result->weekDays);

        // 1 * 7 * 60 * 60 * 24
        $this->assertSame(604800, $result->weeks);
    }

    public function testCanCalculateDurationBetweenAndDisplayAsMinutes(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-8T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result(DurationModifier::Minute);

        // 8 * 60 * 24
        $this->assertSame(11520, $result->days);

        // 5 * 60 * 24
        $this->assertSame(8640, $result->weekDays);

        // 1 * 7 * 60 * 24
        $this->assertSame(10080, $result->weeks);
    }

    public function testCanCalculateDurationBetweenAndDisplayAsHours(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-8T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result(DurationModifier::Hour);

        // 8 * 24
        $this->assertSame(192, $result->days);

        // 5 * 24
        $this->assertSame(144, $result->weekDays);

        // 1 * 7 * 24
        $this->assertSame(168, $result->weeks);
    }

    public function testCanCalculateDurationBetweenAndDisplayAsYears(): void
    {
        $start = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-01T00:00:00+00:00');
        $end = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, '2024-08-8T00:00:00+00:00');

        $calculateDuration = new CalculateDuration($start, $end);
        $result = $calculateDuration->result(DurationModifier::Year);

        // 8 * 0.00273973
        $this->assertSame(0.02192, $result->days);

        // 5 * 0.00273973
        $this->assertSame(0.01644, $result->weekDays);

        // 1 * 7 * 0.00273973
        $this->assertSame(0.01918, $result->weeks);
    }
}