some refactoring for tests and adding some tables

database/migrations/2017_06_09_010621_create_aircrafts_table.php

@@ -9,18 +9,37 @@ class CreateAircraftsTable extends Migration
     {
         Schema::create('aircraft', function (Blueprint $table) {
             $table->increments('id');
+            $table->integer('aircraft_class_id')->unsigned();
             $table->string('icao');
             $table->string('name');
             $table->string('full_name')->nullable();
             $table->string('registration')->nullable();
-            $table->boolean('active');
+            $table->string('tail_number')->nullable();
+            $table->string('cargo_capacity')->nullable();
+            $table->string('fuel_capacity')->nullable();
+            $table->boolean('active')->default(true);
             $table->timestamps();
             $table->softDeletes();
+
+            $table->index('icao');
+            $table->unique('registration');
+        });
+
+        Schema::create('aircraft_classes', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('code');
+            $table->string('name');
+            $table->string('notes')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index('code');
         });
     }
 
     public function down()
     {
         Schema::drop('aircraft');
+        Schema::drop('aircraft_classes');
     }
 }