Complete Setting tests

app/Models/Setting.php

@@ -59,6 +59,13 @@ class Setting extends Model
         $this->attributes['value'] = serialize($value);
     }
 
+    /**
+     * Get the unserialized setting value.
+     *
+     * @param mixed $value
+     *
+     * @return mixed
+     */
     public function getValueAttribute($value)
     {
         return unserialize($value);

database/factories/ModelFactory.php

@@ -61,3 +61,10 @@ $factory->define(\App\Models\Interaction::class, function ($faker) {
         'play_count' => $faker->randomNumber,
     ];
 });
+
+$factory->define(\App\Models\Setting::class, function ($faker) {
+    return [
+        'key' => $faker->slug,
+        'value' => $faker->name,
+    ];
+});

tests/Unit/SettingTest.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Models\Setting;
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+
+class SettingTest extends TestCase
+{
+    use DatabaseMigrations, DatabaseTransactions;
+
+    /** @test */
+    public function it_can_be_instantiated()
+    {
+        $this->assertInstanceOf(Setting::class, new Setting());
+    }
+
+    /** @test */
+    public function it_sets_a_key_value_pair()
+    {
+        // Given a key-value pair
+        $key = 'foo';
+        $value = 'bar';
+
+        // When I call the method to save the key-value
+        Setting::set($key, $value);
+
+        // Then I see the key and serialized value in the database
+        $this->assertDatabaseHas('settings', [
+            'key' => 'foo',
+            'value' => serialize('bar'),
+        ]);
+    }
+
+    /** @test */
+    public function it_supports_associative_arrays_when_saving_settings()
+    {
+        // Given an associative array of multiple settings
+        $settings = [
+            'foo' => 'bar',
+            'baz' => 'qux',
+        ];
+
+        // When I call the method to save the settings
+        Setting::set($settings);
+
+        // Then I see all settings the database
+        $this->assertDatabaseHas('settings', [
+            'key' => 'foo',
+            'value' => serialize('bar'),
+        ])->assertDatabaseHas('settings', [
+            'key' => 'baz',
+            'value' => serialize('qux'),
+        ]);
+    }
+
+    /** @test */
+    public function it_gets_the_setting_value_in_an_unserialized_format()
+    {
+        // Given a setting in the database
+        factory(Setting::class)->create([
+            'key' => 'foo',
+            'value' => 'bar',
+        ]);
+
+        // When I get the setting using the key
+        $value = Setting::get('foo');
+
+        // Then I receive the value in an unserialized format
+        $this->assertSame('bar', $value);
+    }
+}