test: add return void to sample test code in appstarter

Author: kenjis

admin/starter/tests/_support/Database/Migrations/2020-02-22-222222_example_migration.php

@@ -8,7 +8,7 @@ class ExampleMigration extends Migration
 {
     protected $DBGroup = 'tests';
 
-    public function up()
+    public function up(): void
     {
         $this->forge->addField('id');
         $this->forge->addField([
@@ -30,7 +30,7 @@ public function up()
         $this->forge->createTable('factories');
     }
 
-    public function down()
+    public function down(): void
     {
         $this->forge->dropTable('factories');
     }

admin/starter/tests/_support/Database/Seeds/ExampleSeeder.php

@@ -6,7 +6,7 @@
 
 class ExampleSeeder extends Seeder
 {
-    public function run()
+    public function run(): void
     {
         $factories = [
             [

admin/starter/tests/database/ExampleDatabaseTest.php

@@ -14,7 +14,7 @@ final class ExampleDatabaseTest extends CIUnitTestCase
 
     protected $seed = ExampleSeeder::class;
 
-    public function testModelFindAll()
+    public function testModelFindAll(): void
     {
         $model = new ExampleModel();
 
@@ -25,7 +25,7 @@ public function testModelFindAll()
         $this->assertCount(3, $objects);
     }
 
-    public function testSoftDeleteLeavesRow()
+    public function testSoftDeleteLeavesRow(): void
     {
         $model = new ExampleModel();
         $this->setPrivateProperty($model, 'useSoftDeletes', true);

admin/starter/tests/session/ExampleSessionTest.php

@@ -8,7 +8,7 @@
  */
 final class ExampleSessionTest extends CIUnitTestCase
 {
-    public function testSessionSimple()
+    public function testSessionSimple(): void
     {
         $session = Services::session();
 

admin/starter/tests/unit/HealthTest.php

@@ -10,12 +10,12 @@
  */
 final class HealthTest extends CIUnitTestCase
 {
-    public function testIsDefinedAppPath()
+    public function testIsDefinedAppPath(): void
     {
         $this->assertTrue(defined('APPPATH'));
     }
 
-    public function testBaseUrlHasBeenSet()
+    public function testBaseUrlHasBeenSet(): void
     {
         $validation = Services::validation();