Bagian 1: Perancangan Aplikasi

<?php

namespace App\Http\Controllers;

use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class AuthController extends Controller
{
    public function showLogin(): View
    {
        return view('auth.login');
    }

    public function login(Request $request): RedirectResponse
    {
        $credentials = $request->validate([
            'email' => ['required', 'email'],
            'password' => ['required'],
        ]);

        if (Auth::attempt($credentials)) {
            $request->session()->regenerate();

            return redirect()->intended(route('transactions.index'));
        }

        return back()
            ->withErrors(['email' => 'Email atau password salah.'])
            ->onlyInput('email');
    }

    public function logout(Request $request): RedirectResponse
    {
        Auth::logout();

        $request->session()->invalidate();
        $request->session()->regenerateToken();

        return redirect()->route('login');
    }
}

<?php

namespace App\Http\Controllers;

use App\Http\Requests\CategoryRequest;
use App\Models\Category;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;

class CategoryController extends Controller
{
    public function index(): View
    {
        $categories = Category::query()
            ->withCount('transactions')
            ->orderBy('type')
            ->orderBy('name')
            ->get();

        return view('categories.index', [
            'categories' => $categories,
        ]);
    }

    public function create(): View
    {
        return view('categories.create', [
            'category' => new Category([
                'type' => old('type', 'expense'),
                'color' => old('color', '#64748b'),
            ]),
        ]);
    }

    public function store(CategoryRequest $request): RedirectResponse
    {
        Category::create($request->validated());

        return redirect()
            ->route('categories.index')
            ->with('status', 'Kategori berhasil ditambahkan.');
    }

    public function edit(Category $category): View
    {
        return view('categories.edit', [
            'category' => $category,
        ]);
    }

    public function update(CategoryRequest $request, Category $category): RedirectResponse
    {
        // Jenis kategori tidak boleh berubah setelah dipakai transaksi,
        // karena setiap transaksi menyimpan salinan jenisnya sendiri.
        if ($category->transactions()->exists()
            && $request->validated('type') !== $category->type) {
            return back()
                ->withErrors(['type' => 'Jenis kategori tidak dapat diubah karena sudah dipakai transaksi.'])
                ->withInput();
        }

        $category->update($request->validated());

        return redirect()
            ->route('categories.index')
            ->with('status', 'Kategori berhasil diubah.');
    }

    public function destroy(Category $category): RedirectResponse
    {
        if ($category->transactions()->exists()) {
            return redirect()
                ->route('categories.index')
                ->withErrors(['name' => 'Kategori masih dipakai transaksi dan tidak dapat dihapus.']);
        }

        $category->delete();

        return redirect()
            ->route('categories.index')
            ->with('status', 'Kategori berhasil dihapus.');
    }
}

<?php

namespace App\Http\Controllers;

abstract class Controller
{
    //
}

<?php

namespace App\Http\Controllers;

use App\Models\Transaction;
use App\Services\ReportService;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;

class ReportController extends Controller
{
    public function __construct(private ReportService $reports)
    {
    }

    public function show(Request $request, string $month): View
    {
        if (! preg_match('/^\d{4}-(0[1-9]|1[0-2])$/', $month)) {
            abort(404);
        }

        Carbon::setLocale('id');

        $user = $request->user();

        return view('reports.show', [
            'month' => $month,
            'title' => Carbon::parse($month . '-01')->translatedFormat('F Y'),
            'summary' => $this->reports->monthlySummary($user, $month),
            'expensesByCategory' => $this->reports->byCategory($user, $month, Transaction::TYPE_EXPENSE),
            'trend' => $this->reports->monthlyTrend($user, 6, $month),
            'previous' => Carbon::parse($month . '-01')->subMonth()->format('Y-m'),
            'next' => Carbon::parse($month . '-01')->addMonth()->format('Y-m'),
        ]);
    }

    /**
     * Laporan bulan berjalan: cukup teruskan ke /reports/{bulan-ini}.
     */
    public function current(): RedirectResponse
    {
        return redirect()->route('reports.show', now()->format('Y-m'));
    }
}

<?php

namespace App\Http\Controllers;

use App\Http\Requests\TransactionRequest;
use App\Models\Category;
use App\Models\Transaction;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;

class TransactionController extends Controller
{
    public function index(Request $request): View
    {
        // String kosong (filter dikosongkan) diperlakukan tanpa filter.
        $month = $request->input('month') ?: null;

        if ($month !== null && ! preg_match('/^\d{4}-(0[1-9]|1[0-2])$/', $month)) {
            abort(404);
        }

        $transactions = Transaction::query()
            ->with('category')
            ->where('user_id', $request->user()->id)
            ->when($month, fn ($query) => $query->inMonth($month))
            ->orderByDesc('transaction_date')
            ->orderByDesc('id')
            ->paginate(10)
            ->withQueryString();

        return view('transactions.index', [
            'transactions' => $transactions,
            'month' => $month,
        ]);
    }

    public function create(Request $request): View
    {
        return view('transactions.create', [
            'transaction' => new Transaction(),
            'categories' => $this->categoriesForForm(),
            'type' => old('type', 'expense'),
        ]);
    }

    public function store(TransactionRequest $request): RedirectResponse
    {
        $request->user()->transactions()->create($request->validated());

        return redirect()
            ->route('transactions.index')
            ->with('status', 'Transaksi berhasil dicatat.');
    }

    public function edit(Request $request, Transaction $transaction): View
    {
        $this->authorizeOwner($request, $transaction);

        return view('transactions.edit', [
            'transaction' => $transaction,
            'categories' => $this->categoriesForForm(),
            'type' => old('type', $transaction->type),
        ]);
    }

    public function update(TransactionRequest $request, Transaction $transaction): RedirectResponse
    {
        $this->authorizeOwner($request, $transaction);

        $transaction->update($request->validated());

        return redirect()
            ->route('transactions.index')
            ->with('status', 'Transaksi berhasil diubah.');
    }

    public function destroy(Request $request, Transaction $transaction): RedirectResponse
    {
        $this->authorizeOwner($request, $transaction);

        $transaction->delete();

        return redirect()
            ->route('transactions.index')
            ->with('status', 'Transaksi berhasil dihapus.');
    }

    /**
     * Kategori dikelompokkan per jenis untuk select ber-optgroup.
     *
     * @return array<string, \Illuminate\Database\Eloquent\Collection<int, Category>>
     */
    private function categoriesForForm(): array
    {
        return [
            'income' => Category::query()->ofType(Category::TYPE_INCOME)->orderBy('name')->get(),
            'expense' => Category::query()->ofType(Category::TYPE_EXPENSE)->orderBy('name')->get(),
        ];
    }

    private function authorizeOwner(Request $request, Transaction $transaction): void
    {
        abort_if($transaction->user_id !== $request->user()->id, 403);
    }
}

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class CategoryRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Dipakai untuk store dan update; saat update, nama kategori
     * sendiri dikecualikan dari aturan unique.
     *
     * @return array<string, array<int, string|Rule>>
     */
    public function rules(): array
    {
        $unique = Rule::unique('categories', 'name');

        if ($category = $this->route('category')) {
            $unique->ignore($category);
        }

        return [
            'name' => ['required', 'string', 'max:60', $unique],
            'type' => ['required', 'in:income,expense'],
            'color' => ['required', 'regex:/^#[0-9a-fA-F]{6}$/'],
        ];
    }

    /**
     * @return array<string, string>
     */
    public function attributes(): array
    {
        return [
            'name' => 'nama kategori',
            'type' => 'jenis kategori',
            'color' => 'warna',
        ];
    }

    /**
     * @return array<string, string>
     */
    public function messages(): array
    {
        return [
            'color.regex' => 'Warna harus berupa kode hex 6 digit, contoh: #ef4444.',
        ];
    }
}

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class TransactionRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Aturan store dan update identik, jadi satu class cukup.
     *
     * @return array<string, array<int, string|Rule>>
     */
    public function rules(): array
    {
        return [
            'category_id' => [
                'required',
                'integer',
                // Kategori harus tersedia DAN jenisnya cocok dengan
                // jenis transaksi yang dipilih (income/expense).
                Rule::exists('categories', 'id')->where('type', $this->input('type')),
            ],
            'type' => ['required', 'in:income,expense'],
            'amount' => ['required', 'integer', 'min:1', 'max:999999999999'],
            'transaction_date' => [
                'required',
                'date',
                'after:2000-01-01',
                'before_or_equal:today',
            ],
            'note' => ['nullable', 'string', 'max:255'],
        ];
    }

    /**
     * @return array<string, string>
     */
    public function attributes(): array
    {
        return [
            'category_id' => 'kategori',
            'type' => 'jenis transaksi',
            'amount' => 'nominal',
            'transaction_date' => 'tanggal transaksi',
            'note' => 'catatan',
        ];
    }

    /**
     * @return array<string, string>
     */
    public function messages(): array
    {
        return [
            'category_id.exists' => 'Kategori tidak ditemukan atau tidak cocok dengan jenis transaksi.',
        ];
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

class Category extends Model
{
    public const TYPE_INCOME = 'income';

    public const TYPE_EXPENSE = 'expense';

    protected $fillable = [
        'name',
        'type',
        'color',
    ];

    protected function casts(): array
    {
        return [
            'created_at' => 'datetime',
            'updated_at' => 'datetime',
        ];
    }

    public function transactions(): HasMany
    {
        return $this->hasMany(Transaction::class);
    }

    /**
     * Ambil kategori untuk satu jenis transaksi saja (income/expense).
     */
    public function scopeOfType(Builder $query, string $type): Builder
    {
        return $query->where('type', $type);
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Support\Carbon;

class Transaction extends Model
{
    public const TYPE_INCOME = 'income';

    public const TYPE_EXPENSE = 'expense';

    protected $fillable = [
        'category_id',
        'type',
        'amount',
        'transaction_date',
        'note',
    ];

    protected function casts(): array
    {
        return [
            'category_id' => 'integer',
            'user_id' => 'integer',
            'amount' => 'integer',
            'transaction_date' => 'date:Y-m-d',
        ];
    }

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function category(): BelongsTo
    {
        return $this->belongsTo(Category::class);
    }

    /**
     * Batasi query pada satu bulan (format Y-m, contoh: 2026-10).
     */
    public function scopeInMonth(Builder $query, string $month): Builder
    {
        $start = Carbon::parse($month . '-01');

        return $query->whereBetween('transaction_date', [
            $start->toDateString(),
            $start->copy()->endOfMonth()->toDateString(),
        ]);
    }
}

<?php

namespace App\Models;

// use Illuminate\Contracts\Auth\MustVerifyEmail;
use Database\Factories\UserFactory;
use Illuminate\Database\Eloquent\Attributes\Fillable;
use Illuminate\Database\Eloquent\Attributes\Hidden;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;

#[Fillable(['name', 'email', 'password'])]
#[Hidden(['password', 'remember_token'])]
class User extends Authenticatable
{
    /** @use HasFactory<UserFactory> */
    use HasFactory, Notifiable;

    /**
     * Get the attributes that should be cast.
     *
     * @return array<string, string>
     */
    protected function casts(): array
    {
        return [
            'email_verified_at' => 'datetime',
            'password' => 'hashed',
        ];
    }

    public function transactions(): HasMany
    {
        return $this->hasMany(Transaction::class);
    }
}

<?php

namespace App\Services;

use App\Models\User;
use Illuminate\Support\Carbon;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\DB;

class ReportService
{
    /**
     * Ringkasan satu bulan: total pemasukan, pengeluaran, dan selisihnya.
     *
     * @return array{income: int, expense: int, balance: int}
     */
    public function monthlySummary(User $user, string $month): array
    {
        $start = Carbon::parse($month . '-01');

        $row = DB::table('transactions')
            ->where('user_id', $user->id)
            ->whereBetween('transaction_date', [
                $start->toDateString(),
                $start->copy()->endOfMonth()->toDateString(),
            ])
            ->selectRaw("COALESCE(SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END), 0) AS income")
            ->selectRaw("COALESCE(SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END), 0) AS expense")
            ->first();

        $income = (int) $row->income;
        $expense = (int) $row->expense;

        return [
            'income' => $income,
            'expense' => $expense,
            'balance' => $income - $expense,
        ];
    }

    /**
     * Total per kategori untuk satu bulan dan satu jenis transaksi,
     * diurutkan dari total terbesar.
     *
     * @return \Illuminate\Support\Collection<int, array{id: int, name: string, color: string, total: int}>
     */
    public function byCategory(User $user, string $month, string $type): Collection
    {
        $start = Carbon::parse($month . '-01');

        return DB::table('transactions')
            ->join('categories', 'categories.id', '=', 'transactions.category_id')
            ->where('transactions.user_id', $user->id)
            ->where('transactions.type', $type)
            ->whereBetween('transaction_date', [
                $start->toDateString(),
                $start->copy()->endOfMonth()->toDateString(),
            ])
            ->groupBy('categories.id', 'categories.name', 'categories.color')
            ->selectRaw('categories.id AS id')
            ->selectRaw('categories.name AS name')
            ->selectRaw('categories.color AS color')
            ->selectRaw('SUM(transactions.amount) AS total')
            ->orderByDesc('total')
            ->get()
            ->map(fn (object $row) => [
                'id' => (int) $row->id,
                'name' => $row->name,
                'color' => $row->color,
                'total' => (int) $row->total,
            ]);
    }

    /**
     * Tren arus kas N bulan terakhir sampai (dan termasuk) $untilMonth.
     *
     * @return \Illuminate\Support\Collection<int, array{month: string, label: string, income: int, expense: int}>
     */
    public function monthlyTrend(User $user, int $months = 6, ?string $untilMonth = null): Collection
    {
        $until = Carbon::parse(($untilMonth ?? now()->format('Y-m')) . '-01')->endOfMonth();
        $from = $until->copy()->startOfMonth()->subMonths($months - 1);

        $totals = DB::table('transactions')
            ->where('user_id', $user->id)
            ->whereBetween('transaction_date', [$from->toDateString(), $until->toDateString()])
            ->groupBy(DB::raw('substr(transaction_date, 1, 7)'))
            ->selectRaw("substr(transaction_date, 1, 7) AS month")
            ->selectRaw("COALESCE(SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END), 0) AS income")
            ->selectRaw("COALESCE(SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END), 0) AS expense")
            ->get()
            ->keyBy('month');

        return Collection::times($months, function (int $i) use ($from, $totals) {
            $cursor = $from->copy()->addMonths($i - 1);
            $key = $cursor->format('Y-m');
            $row = $totals->get($key);

            return [
                'month' => $key,
                'label' => $cursor->translatedFormat('M Y'),
                'income' => (int) ($row->income ?? 0),
                'expense' => (int) ($row->expense ?? 0),
            ];
        });
    }
}

<?php

namespace App\Support;

/**
 * Format angka rupiah: selalu bulat (tanpa sen), pemisah ribuan titik.
 */
final class Rupiah
{
    public static function format(int $amount): string
    {
        return 'Rp ' . number_format($amount, 0, ',', '.');
    }
}

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('categories', function (Blueprint $table) {
            $table->id();
            $table->string('name', 60)->unique();
            $table->enum('type', ['income', 'expense']);
            $table->char('color', 7)->default('#64748b');
            $table->timestamps();
            $table->index(['type', 'name']);
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('categories');
    }
};

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('transactions', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')
                ->constrained()
                ->cascadeOnDelete();
            $table->foreignId('category_id')
                ->constrained()
                ->restrictOnDelete();
            $table->decimal('amount', 14, 0);
            $table->enum('type', ['income', 'expense']);
            $table->date('transaction_date');
            $table->string('note')->nullable();
            $table->timestamps();
            $table->index(['user_id', 'transaction_date']);
            $table->index(['category_id', 'transaction_date']);
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('transactions');
    }
};

<?php

namespace Database\Seeders;

use App\Models\Category;
use App\Models\Transaction;
use App\Models\User;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\Hash;

class DatabaseSeeder extends Seeder
{
    public function run(): void
    {
        $budi = User::create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
            'password' => Hash::make('password'),
        ]);

        $categories = [
            'Gaji' => ['type' => 'income', 'color' => '#16a34a'],
            'Bonus' => ['type' => 'income', 'color' => '#22c55e'],
            'Makanan' => ['type' => 'expense', 'color' => '#ef4444'],
            'Transportasi' => ['type' => 'expense', 'color' => '#f97316'],
            'Hiburan' => ['type' => 'expense', 'color' => '#a855f7'],
        ];

        foreach ($categories as $name => $attributes) {
            Category::create(['name' => $name] + $attributes);
        }

        $rows = [
            // [kategori, jenis, nominal, tanggal, catatan]
            ['Gaji', 'income', 5000000, '2026-10-01', 'Gaji bulan Oktober'],
            ['Bonus', 'income', 500000, '2026-10-10', 'Bonus proyek aplikasi'],
            ['Makanan', 'expense', 25000, '2026-10-04', 'Makan siang di kantin'],
            ['Makanan', 'expense', 45000, '2026-10-07', 'Kopi dan camilan'],
            ['Makanan', 'expense', 60000, '2026-10-12', 'Belanja bahan makanan'],
            ['Transportasi', 'expense', 15000, '2026-10-03', 'Ojek ke kantor'],
            ['Transportasi', 'expense', 20000, '2026-10-09', 'Isi bensin motor'],
            ['Hiburan', 'expense', 80000, '2026-10-11', 'Tiket bioskop akhir pekan'],
            ['Gaji', 'income', 4800000, '2026-09-01', 'Gaji bulan September'],
            ['Makanan', 'expense', 40000, '2026-09-16', 'Makan malam bersama teman'],
            ['Makanan', 'expense', 30000, '2026-08-02', 'Camilan akhir bulan'],
        ];

        foreach ($rows as [$categoryName, $type, $amount, $date, $note]) {
            $budi->transactions()->create([
                'category_id' => Category::where('name', $categoryName)->value('id'),
                'type' => $type,
                'amount' => $amount,
                'transaction_date' => $date,
                'note' => $note,
            ]);
        }

        $this->command?->info('Transaksi terisi: ' . Transaction::count());
    }
}

<?php

use App\Http\Controllers\AuthController;
use App\Http\Controllers\CategoryController;
use App\Http\Controllers\ReportController;
use App\Http\Controllers\TransactionController;
use Illuminate\Support\Facades\Route;

Route::get('/', fn () => redirect()->route('transactions.index'))->name('home');

Route::middleware('guest')->group(function () {
    Route::get('login', [AuthController::class, 'showLogin'])->name('login');
    Route::post('login', [AuthController::class, 'login'])->name('login.attempt');
});

Route::post('logout', [AuthController::class, 'logout'])
    ->middleware('auth')
    ->name('logout');

Route::middleware('auth')->group(function () {
    Route::resource('transactions', TransactionController::class);

    Route::resource('categories', CategoryController::class)
        ->except('show');

    Route::get('reports', [ReportController::class, 'current'])->name('reports.index');
    Route::get('reports/{month}', [ReportController::class, 'show'])
        ->where('month', '[0-9]{4}-[0-9]{2}')
        ->name('reports.show');
});

<?php

namespace Tests\Feature;

use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class AuthTest extends TestCase
{
    use RefreshDatabase;

    public function test_tamu_diarahkan_ke_halaman_login(): void
    {
        $this->get(route('transactions.index'))
            ->assertRedirect(route('login'));
    }

    public function test_login_berhasil_dan_gagal(): void
    {
        User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
            'password' => bcrypt('password-rahasia'),
        ]);

        // Kredensial salah: kembali dengan error.
        $this->from(route('login'))
            ->post(route('login.attempt'), [
                'email' => '[email protected]',
                'password' => 'salah',
            ])
            ->assertSessionHasErrors('email');

        // Kredensial benar: masuk dan diarahkan ke daftar transaksi.
        $this->post(route('login.attempt'), [
            'email' => '[email protected]',
            'password' => 'password-rahasia',
        ])
        ->assertRedirect(route('transactions.index'));

        $this->assertAuthenticated();
    }
}

<?php

namespace Tests\Feature;

use App\Models\Category;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class CategoryTest extends TestCase
{
    use RefreshDatabase;

    public function test_bisa_menambah_kategori(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        $response = $this->actingAs($user)->post(route('categories.store'), [
            'name' => 'Transportasi',
            'type' => 'expense',
            'color' => '#f97316',
        ]);

        $response->assertRedirect(route('categories.index'));
        $this->assertDatabaseHas('categories', [
            'name' => 'Transportasi',
            'type' => 'expense',
            'color' => '#f97316',
        ]);
    }

    public function test_warna_harus_kode_hex_enam_digit(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        foreach (['merah', '#12345', '#zzzzzz'] as $invalidColor) {
            $this->actingAs($user)->post(route('categories.store'), [
                'name' => 'Kategori Uji',
                'type' => 'expense',
                'color' => $invalidColor,
            ])->assertSessionHasErrors('color');
        }

        $this->assertDatabaseCount('categories', 0);
    }

    public function test_nama_kategori_harus_unik(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        Category::create([
            'name' => 'Makanan',
            'type' => 'expense',
            'color' => '#ef4444',
        ]);

        $this->actingAs($user)->post(route('categories.store'), [
            'name' => 'Makanan',
            'type' => 'expense',
            'color' => '#ef4444',
        ])->assertSessionHasErrors('name');

        $this->assertDatabaseCount('categories', 1);
    }

    public function test_bisa_mengubah_kategori_dengan_nama_sendiri(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        $category = Category::create([
            'name' => 'Makanan',
            'type' => 'expense',
            'color' => '#ef4444',
        ]);

        // Nama yang sama tetap boleh: aturan unique mengabaikan baris sendiri.
        $this->actingAs($user)
            ->put(route('categories.update', $category), [
                'name' => 'Makanan',
                'type' => 'expense',
                'color' => '#dc2626',
            ])
            ->assertRedirect(route('categories.index'));

        $this->assertDatabaseHas('categories', [
            'id' => $category->id,
            'name' => 'Makanan',
            'color' => '#dc2626',
        ]);
    }

    public function test_jenis_tidak_bisa_berubah_setelah_dipakai(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        $category = Category::create([
            'name' => 'Makanan',
            'type' => 'expense',
            'color' => '#ef4444',
        ]);

        $user->transactions()->create([
            'category_id' => $category->id,
            'type' => 'expense',
            'amount' => 45000,
            'transaction_date' => '2026-10-05',
        ]);

        $this->actingAs($user)
            ->put(route('categories.update', $category), [
                'name' => 'Makanan',
                'type' => 'income',
                'color' => '#ef4444',
            ])
            ->assertSessionHasErrors('type');

        $this->assertDatabaseHas('categories', [
            'id' => $category->id,
            'type' => 'expense',
        ]);
    }

    public function test_kategori_dipakai_tidak_bisa_dihapus(): void
    {
        $user = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        $used = Category::create([
            'name' => 'Makanan',
            'type' => 'expense',
            'color' => '#ef4444',
        ]);
        $unused = Category::create([
            'name' => 'Hiburan',
            'type' => 'expense',
            'color' => '#a855f7',
        ]);

        $user->transactions()->create([
            'category_id' => $used->id,
            'type' => 'expense',
            'amount' => 45000,
            'transaction_date' => '2026-10-05',
        ]);

        $this->actingAs($user)
            ->delete(route('categories.destroy', $used))
            ->assertRedirect(route('categories.index'))
            ->assertSessionHasErrors('name');

        $this->assertDatabaseHas('categories', ['id' => $used->id]);

        // Kategori tanpa transaksi boleh dihapus.
        $this->actingAs($user)
            ->delete(route('categories.destroy', $unused))
            ->assertRedirect(route('categories.index'));

        $this->assertDatabaseMissing('categories', ['id' => $unused->id]);
    }
}

<?php

namespace Tests\Feature;

use Tests\TestCase;

class ExampleTest extends TestCase
{
    /**
     * Halaman depan cukup meneruskan pengunjung ke daftar transaksi;
     * dari sana middleware auth yang meneruskan tamu ke halaman login.
     */
    public function test_halaman_depan_meneruskan_ke_daftar_transaksi(): void
    {
        $this->get('/')
            ->assertRedirect(route('transactions.index'));
    }
}

<?php

namespace Tests\Feature;

use App\Models\Category;
use App\Models\User;
use App\Services\ReportService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class ReportCalculationTest extends TestCase
{
    use RefreshDatabase;

    /**
     * Data tetap dengan angka yang mudah dihitung manual.
     *
     * Oktober 2026 (milik Budi):
     * - Pemasukan: Gaji 5.000.000 + Bonus 500.000            = 5.500.000
     * - Pengeluaran: Makanan 130.000, Hiburan 80.000,
     *   Transportasi 35.000                                    = 245.000
     * - Selisih                                                 = 5.255.000
     */
    private function seedBudi(): User
    {
        $budi = User::factory()->create([
            'name' => 'Budi Santoso',
            'email' => '[email protected]',
        ]);

        $gaji = Category::create(['name' => 'Gaji', 'type' => 'income', 'color' => '#16a34a']);
        $bonus = Category::create(['name' => 'Bonus', 'type' => 'income', 'color' => '#22c55e']);
        $makanan = Category::create(['name' => 'Makanan', 'type' => 'expense', 'color' => '#ef4444']);
        $transportasi = Category::create(['name' => 'Transportasi', 'type' => 'expense', 'color' => '#f97316']);
        $hiburan = Category::create(['name' => 'Hiburan', 'type' => 'expense', 'color' => '#a855f7']);

        $budi->transactions()->createMany([
            ['category_id' => $gaji->id, 'type' => 'income', 'amount' => 5000000, 'transaction_date' => '2026-10-01', 'note' => 'Gaji bulan Oktober'],
            ['category_id' => $bonus->id, 'type' => 'income', 'amount' => 500000, 'transaction_date' => '2026-10-10', 'note' => 'Bonus proyek aplikasi'],
            ['category_id' => $makanan->id, 'type' => 'expense', 'amount' => 25000, 'transaction_date' => '2026-10-04', 'note' => 'Makan siang di kantin'],
            ['category_id' => $makanan->id, 'type' => 'expense', 'amount' => 45000, 'transaction_date' => '2026-10-07', 'note' => 'Kopi dan camilan'],
            ['category_id' => $makanan->id, 'type' => 'expense', 'amount' => 60000, 'transaction_date' => '2026-10-12', 'note' => 'Belanja bahan makanan'],
            ['category_id' => $transportasi->id, 'type' => 'expense', 'amount' => 15000, 'transaction_date' => '2026-10-03', 'note' => 'Ojek ke kantor'],
            ['category_id' => $transportasi->id, 'type' => 'expense', 'amount' => 20000, 'transaction_date' => '2026-10-09', 'note' => 'Isi bensin motor'],
            ['category_id' => $hiburan->id, 'type' => 'expense', 'amount' => 80000, 'transaction_date' => '2026-10-11', 'note' => 'Tiket bioskop akhir pekan'],
            ['category_id' => $gaji->id, 'type' => 'income', 'amount' => 4800000, 'transaction_date' => '2026-09-01', 'note' => 'Gaji bulan September'],
            ['category_id' => $makanan->id, 'type' => 'expense', 'amount' => 40000, 'transaction_date' => '2026-09-16', 'note' => 'Makan malam bersama teman'],
            ['category_id' => $makanan->id, 'type' => 'expense', 'amount' => 30000, 'transaction_date' => '2026-08-02', 'note' => 'Camilan akhir bulan'],
        ]);

        return $budi;
    }

    public function test_ringkasan_bulan_oktober(): void
    {
        $budi = $this->seedBudi();

        $summary = app(ReportService::class)->monthlySummary($budi, '2026-10');

        $this->assertSame(5500000, $summary['income']);
        $this->assertSame(245000, $summary['expense']);
        $this->assertSame(5255000, $summary['balance']);
    }

    public function test_ringkasan_bulan_september(): void
    {
        $budi = $this->seedBudi();

        $summary = app(ReportService::class)->monthlySummary($budi, '2026-09');

        $this->assertSame(4800000, $summary['income']);
        $this->assertSame(40000, $summary['expense']);
        $this->assertSame(4760000, $summary['balance']);
    }

    public function test_bulan_tanpa_transaksi_menghasilkan_nol(): void
    {
        $budi = $this->seedBudi();

        $summary = app(ReportService::class)->monthlySummary($budi, '2025-01');

        $this->assertSame(0, $summary['income']);
        $this->assertSame(0, $summary['expense']);
        $this->assertSame(0, $summary['balance']);
    }

    public function test_total_pengeluaran_per_kategori_bulan_oktober(): void
    {
        $budi = $this->seedBudi();

        $rows = app(ReportService::class)
            ->byCategory($budi, '2026-10', 'expense');

        $this->assertSame(
            [
                ['id' => 3, 'name' => 'Makanan', 'color' => '#ef4444', 'total' => 130000],
                ['id' => 5, 'name' => 'Hiburan', 'color' => '#a855f7', 'total' => 80000],
                ['id' => 4, 'name' => 'Transportasi', 'color' => '#f97316', 'total' => 35000],
            ],
            $rows->all(),
        );
    }

    public function test_total_pemasukan_per_kategori_bulan_oktober(): void
    {
        $budi = $this->seedBudi();

        $rows = app(ReportService::class)
            ->byCategory($budi, '2026-10', 'income');

        $this->assertSame(
            [
                ['id' => 1, 'name' => 'Gaji', 'color' => '#16a34a', 'total' => 5000000],
                ['id' => 2, 'name' => 'Bonus', 'color' => '#22c55e', 'total' => 500000],
            ],
            $rows->all(),
        );
    }

    public function test_tren_arus_kas_enam_bulan(): void
    {
        $budi = $this->seedBudi();

        $trend = app(ReportService::class)
            ->monthlyTrend($budi, 6, '2026-10');

        $this->assertSame(
            ['2026-05', '2026-06', '2026-07', '2026-08', '2026-09', '2026-10'],
            $trend->pluck('month')->all(),
        );

        $byMonth = $trend->keyBy('month');

        $this->assertSame(0, $byMonth['2026-05']['income']);
        $this->assertSame(0, $byMonth['2026-05']['expense']);
        $this->assertSame(30000, $byMonth['2026-08']['expense']);
        $this->assertSame(4800000, $byMonth['2026-09']['income']);
        $this->assertSame(40000, $byMonth['2026-09']['expense']);
        $this->assertSame(5500000, $byMonth['2026-10']['income']);
        $this->assertSame(245000, $byMonth['2026-10']['expense']);
    }

    public function test_laporan_hanya_menghitung_transaksi_milik_sendiri(): void
    {
        $budi = $this->seedBudi();

        $siti = User::factory()->create([
            'name' => 'Siti Rahayu',
            'email' => '[email protected]',
        ]);

        $gaji = Category::where('name', 'Gaji')->first();

        $siti->transactions()->create([
            'category_id' => $gaji->id,
            'type' => 'income',
            'amount' => 2000000,
            'transaction_date' => '2026-10-02',
        ]);

        $service = app(ReportService::class);

        // Laporan Budi tidak berubah oleh transaksi Siti.
        $this->assertSame(5500000, $service->monthlySummary($budi, '2026-10')['income']);

        // Laporan Siti hanya berisi transaksinya sendiri.
        $this->assertSame(2000000, $service->monthlySummary($siti, '2026-10')['income']);
        $this->assertSame(0, $service->monthlySummary($siti, '2026-10')['expense']);
    }

    public function test_halaman_laporan_menampilkan_angka_dan_batang(): void
    {
        $budi = $this->seedBudi();

        $response = $this->actingAs($budi)->get(route('reports.show', '2026-10'));

        $response->assertOk()
            ->assertSee('Laporan Oktober 2026')
            ->assertSee('Rp 5.500.000')
            ->assertSee('Rp 245.000')
            ->assertSee('Rp 5.255.000')
            // Lebar batang kategori: persentase dari total pengeluaran.
            ->assertSee('width: 53%')   // Makanan: 130.000 / 245.000
            ->assertSee('width: 33%')   // Hiburan: 80.000 / 245.000
            ->assertSee('width: 14%')   // Transportasi: 35.000 / 245.000
            // Lebar batang tren: persentase dari nilai terbesar (5.500.000).
            ->assertSee('width: 100%')  // Pemasukan Oktober.
            ->assertSee('width: 4%');   // Pengeluaran Oktober: 245.000 / 5.500.000.
    }

    public function test_bulan_tidak_valid_ditolak(): void
    {
        $budi = $this->seedBudi();

        $this->actingAs($budi)->get('/reports/2026-13')->assertNotFound();
        $this->actingAs($budi)->get('/reports/bulan-ini')->assertNotFound();
    }
}