diff --git a/app/AccessLog.php b/app/AccessLog.php
index 84b87cd..3dc7aa9 100644
--- a/app/AccessLog.php
+++ b/app/AccessLog.php
@@ -9,8 +9,16 @@ class AccessLog extends Model
 {
     use SoftDeletes;
 
+    protected $fillable = [
+        'siswa_id',
+    ];
+
     protected $with = [ 'siswa' ];
 
+    protected $date = [
+        'created_at', 'updated_at', 'deleted_at',
+    ];
+
     public function siswa()
     {
         return $this->belongsTo('App\Siswa');
diff --git a/app/Siswa.php b/app/Siswa.php
index 45442f2..ebc4fe6 100644
--- a/app/Siswa.php
+++ b/app/Siswa.php
@@ -8,4 +8,17 @@ use Illuminate\Database\Eloquent\SoftDeletes;
 class Siswa extends Model
 {
     use SoftDeletes;
+
+    protected $fillable = [
+        'nama', 'nisn', 'kelas', 'tempat_lahir', 'tanggal_lahir', 'lulus',
+    ];
+
+    protected $dates = [
+        'created_at', 'updated_at', 'deleted_at',
+    ];
+
+    protected $casts = [
+        'tanggal_lahir' => 'datetime:Y-m-d',
+        'lulus' => 'boolean',
+    ];
 }
diff --git a/database/migrations/2019_05_09_062832_create_siswas_table.php b/database/migrations/2019_05_09_062832_create_siswas_table.php
index f4021c7..4ef1e89 100644
--- a/database/migrations/2019_05_09_062832_create_siswas_table.php
+++ b/database/migrations/2019_05_09_062832_create_siswas_table.php
@@ -19,7 +19,7 @@ class CreateSiswasTable extends Migration
             $table->string('nisn');
             $table->string('kelas');
             $table->string('tempat_lahir');
-            $table->string('tanggal_lahir');
+            $table->date('tanggal_lahir');
             $table->boolean('lulus');
             $table->timestamps();
             $table->softDeletes();
diff --git a/database/migrations/2019_05_09_064211_create_access_logs_table.php b/database/migrations/2019_05_09_064211_create_access_logs_table.php
index e4174b7..109ee87 100644
--- a/database/migrations/2019_05_09_064211_create_access_logs_table.php
+++ b/database/migrations/2019_05_09_064211_create_access_logs_table.php
@@ -15,11 +15,12 @@ class CreateAccessLogsTable extends Migration
     {
         Schema::create('access_logs', function (Blueprint $table) {
             $table->bigIncrements('id');
-            $table->unsignedInteger('siswa_id');
+            $table->unsignedBigInteger('siswa_id');
             $table->timestamps();
             $table->softDeletes();
 
             $table->foreign('siswa_id')
+                  ->references('id')
                   ->on('siswas')
                   ->onUpdate('cascade')
                   ->onDelete('restrict');
diff --git a/routes/api.php b/routes/api.php
index 256c316..c0f7681 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -30,9 +30,7 @@ Route::post('/siswa', function (Request $request) {
 
     // Redirect with error if not found
     if (!$siswa || $siswa == null) {
-        return redirect()->back()
-                         ->withErrors(['siswa' => 'Siswa tidak ditemukan.'])
-                         ->withInput();
+        return response()->json(['siswa' => 'Siswa tidak ditemukan.'], 404);
     }
 
     // Write to log
diff --git a/tests/Feature/ApplicationTest.php b/tests/Feature/ApplicationTest.php
new file mode 100644
index 0000000..2501783
--- /dev/null
+++ b/tests/Feature/ApplicationTest.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace Tests\Feature;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+class ApplicationTest extends TestCase
+{
+    use RefreshDatabase, WithFaker;
+
+    public function testCariDataSiswaSalahGagal()
+    {
+        $response = $this->json('POST', '/api/siswa', ['nama' => 'Sally', 'nisn' => '1234567890']);
+
+        $response
+            ->assertStatus(404)
+            ->assertJson([
+                'siswa' => 'Siswa tidak ditemukan.'
+            ]);
+    }
+
+    public function testCariDataSiswaTidakDiisiGagal()
+    {
+        $response = $this->json('POST', '/api/siswa', ['nama' => '', 'nisn' => '']);
+
+        $response
+            ->assertStatus(422)
+            ->assertJson([
+                'message' => 'The given data was invalid.',
+                'errors' => [
+                    'nama' => ['Kolom nama harus diisi.'],
+                    'nisn' => ['Kolom nisn harus diisi.'],
+                ],
+            ]);
+    }
+
+    public function testCariDataSiswaBenarBerhasil()
+    {
+        $siswa = \App\Siswa::create([
+            'nama' => 'Sally',
+            'nisn' => '1234567890',
+            'kelas' => 'xii mm 1',
+            'tempat_lahir' => $this->faker->city(),
+            'tanggal_lahir' => $this->faker->dateTime('now', 'Asia/Jakarta'),
+            'lulus' => true,
+        ]);
+
+        $response = $this->json('POST', '/api/siswa', ['nama' => 'Sally', 'nisn' => '1234567890']);
+
+        $response
+            ->assertStatus(200)
+            ->assertJson([
+                'nama' => $siswa->nama,
+                'nisn' => $siswa->nisn,
+                'kelas' => $siswa->kelas,
+                'tempat_lahir' => $siswa->tempat_lahir,
+                'tanggal_lahir' => $siswa->tanggal_lahir->toDateString(),
+                'lulus' => true,
+            ]);
+    }
+
+    public function testCariDataSiswaBenarMasukLog()
+    {
+        $siswa = \App\Siswa::create([
+            'nama' => 'Sally',
+            'nisn' => '1234567890',
+            'kelas' => 'xii mm 1',
+            'tempat_lahir' => $this->faker->city(),
+            'tanggal_lahir' => $this->faker->dateTime('now', 'Asia/Jakarta'),
+            'lulus' => true,
+        ]);
+
+        $response = $this->json('POST', '/api/siswa', ['nama' => 'Sally', 'nisn' => '1234567890']);
+
+        $this->assertDatabaseHas('access_logs', [
+            'siswa_id' => $siswa->id,
+        ]);
+    }
+}
diff --git a/tests/Feature/SiswaTest.php b/tests/Feature/SiswaTest.php
new file mode 100644
index 0000000..6f126d3
--- /dev/null
+++ b/tests/Feature/SiswaTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Tests\Feature;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+class SiswaTest extends TestCase
+{
+    use RefreshDatabase, WithFaker;
+
+    public function testCariDataSiswaGagal()
+    {
+        $response = $this->json('POST', '/api/siswa', ['nama' => 'Sally', 'nisn' => '1234567890']);
+
+        $response
+            ->assertStatus(404)
+            ->assertJson([
+                'siswa' => 'Siswa tidak ditemukan.'
+            ]);
+    }
+
+    public function testCariDataSiswaBerhasil()
+    {
+        $siswa = \App\Siswa::create([
+            'nama' => 'Sally',
+            'nisn' => '1234567890',
+            'kelas' => 'xii mm 1',
+            'tempat_lahir' => $this->faker->city(),
+            'tanggal_lahir' => $this->faker->dateTime('now', 'Asia/Jakarta'),
+            'lulus' => true,
+        ]);
+
+        $response = $this->json('POST', '/api/siswa', ['nama' => 'Sally', 'nisn' => '1234567890']);
+
+        $response
+            ->assertStatus(200)
+            ->assertJson([
+                'nama' => $siswa->nama,
+                'nisn' => $siswa->nisn,
+                'kelas' => $siswa->kelas,
+                'tempat_lahir' => $siswa->tempat_lahir,
+                'tanggal_lahir' => $siswa->tanggal_lahir->toDateString(),
+                'lulus' => true,
+            ]);
+    }
+}