Added unit tests

tests/Feature/AppVersionTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class AppVersionTest extends TestCase
+{
+    /**
+     * Test the version CLI command
+     *
+     * @return void
+     */
+    public function testVersionCommand()
+    {
+        $response = $this->artisan('speedtest:version')
+                         ->expectsOutput('Speedtest Tracker v' . config('speedtest.version'));
+    }
+}

tests/Feature/ConfigTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class ConfigTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private $configStructure = [
+        'base',
+        'graphs' => [
+            'download_upload_graph_enabled' => [],
+            'download_upload_graph_width' => [],
+            'ping_graph_enabled' => [],
+            'ping_graph_width' => [],
+            'failure_graph_enabled' => [],
+            'failure_graph_width' => [],
+        ],
+        'editable' => [
+            'slack_webhook',
+            'telegram_bot_token',
+            'telegram_chat_id'
+        ],
+    ];
+
+    /**
+     * Test config returned by API
+     *
+     * @return void
+     */
+    public function testAPIConfig()
+    {
+        $response = $this->get('api/settings/config');
+
+        $response->assertJsonStructure($this->configStructure);
+    }
+}

tests/Feature/CronRuleTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use App\Rules\Cron;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class CronRuleTest extends TestCase
+{
+    /**
+     * Test a valid CRON expression
+     *
+     * @return void
+     */
+    public function testValidCronValidationRule()
+    {
+        $rule = [
+            'test' => new Cron,
+        ];
+
+        $data = [
+            'test' => '*/5 * * * *',
+        ];
+
+        $validator = $this->app['validator']->make($data, $rule);
+        $this->assertTrue($validator->passes());
+    }
+
+    /**
+     * Test an invalid CRON expression
+     *
+     * @return void
+     */
+    public function testInvalidCronValidationRule()
+    {
+        $rule = [
+            'test' => new Cron,
+        ];
+
+        $data = [
+            'test' => 'invalid',
+        ];
+
+        $validator = $this->app['validator']->make($data, $rule);
+        $this->assertFalse($validator->passes());
+    }
+}

tests/Feature/SetSlackWebhookTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use App\Helpers\SettingsHelper;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class SetSlackWebhookTest extends TestCase
+{
+    use RefreshDatabase;
+
+    /**
+     * Test settings slack webhook via API
+     *
+     * @return void
+     */
+    public function testSetSlackWebhookAPI()
+    {
+        $response = $this->json('PUT', 'api/settings', [
+            'name' => 'slack_webhook',
+            'value' => 'PHPUnitAPI'
+        ]);
+
+        $response->assertStatus(200);
+        $this->assertEquals('PHPUnitAPI', SettingsHelper::get('slack_webhook')->value);
+    }
+}

tests/Feature/SettingsTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class SettingsTest extends TestCase
+{
+    /**
+     * A basic feature test example.
+     *
+     * @return void
+     */
+    public function testExample()
+    {
+        $response = $this->get('/');
+
+        $response->assertStatus(200);
+    }
+}