created Streak service test

Author: owenbcoding

tests/Unit/StreakServiceTest.php

@@ -0,0 +1,113 @@
+<?php
+
+use App\Models\CheckIn;
+use App\Models\User;
+use App\Models\WorkSession;
+use App\Services\StreakService;
+use Carbon\Carbon;
+
+beforeEach(function () {
+    Carbon::setTestNow();
+});
+
+it('returns an empty array of active days when there is no activity', function () {
+    $user = User::factory()->create();
+
+    $service = new StreakService();
+
+    expect($service->activeDaysForUser($user))->toBe([]);
+});
+
+it('computes active days from both check-ins and completed work sessions', function () {
+    $user = User::factory()->create();
+
+    Carbon::setTestNow('2026-03-10 10:00:00');
+
+    // Check-ins on two days.
+    CheckIn::create([
+        'user_id' => $user->id,
+        'date' => Carbon::today()->subDays(2),
+        'intention' => 'Earlier check-in',
+    ]);
+
+    CheckIn::create([
+        'user_id' => $user->id,
+        'date' => Carbon::today()->subDay(),
+        'intention' => 'Yesterday check-in',
+    ]);
+
+    // Completed work session today.
+    WorkSession::create([
+        'user_id' => $user->id,
+        'started_at' => Carbon::today()->setTime(8, 0),
+        'ended_at' => Carbon::today()->setTime(9, 0),
+        'planned_duration_minutes' => 60,
+    ]);
+
+    $service = new StreakService();
+
+    $days = $service->activeDaysForUser($user);
+
+    expect($days)->toEqualCanonicalizing([
+        Carbon::today()->toDateString(),
+        Carbon::today()->subDay()->toDateString(),
+        Carbon::today()->subDays(2)->toDateString(),
+    ]);
+});
+
+it('returns 0 streak when today is not active', function () {
+    $user = User::factory()->create();
+
+    Carbon::setTestNow('2026-03-10 10:00:00');
+
+    // Activity only on previous days, not today.
+    CheckIn::create([
+        'user_id' => $user->id,
+        'date' => Carbon::today()->subDay(),
+        'intention' => 'Yesterday only',
+    ]);
+
+    $service = new StreakService();
+
+    expect($service->currentStreak($user))->toBe(0);
+});
+
+it('counts consecutive active days ending today as the current streak', function () {
+    $user = User::factory()->create();
+
+    Carbon::setTestNow('2026-03-10 10:00:00');
+
+    // Three consecutive days including today.
+    foreach ([2, 1, 0] as $daysAgo) {
+        CheckIn::create([
+            'user_id' => $user->id,
+            'date' => Carbon::today()->subDays($daysAgo),
+            'intention' => 'Day-'.$daysAgo,
+        ]);
+    }
+
+    $service = new StreakService();
+
+    expect($service->currentStreak($user))->toBe(3);
+});
+
+it('breaks the streak when there is a gap day', function () {
+    $user = User::factory()->create();
+
+    Carbon::setTestNow('2026-03-10 10:00:00');
+
+    // Activity 4 and 2 days ago, plus today. Gap at 1 day ago.
+    foreach ([4, 2, 0] as $daysAgo) {
+        CheckIn::create([
+            'user_id' => $user->id,
+            'date' => Carbon::today()->subDays($daysAgo),
+            'intention' => 'Day-'.$daysAgo,
+        ]);
+    }
+
+    $service = new StreakService();
+
+    // Only today is consecutive, yesterday is inactive so streak is 1.
+    expect($service->currentStreak($user))->toBe(1);
+});
+