diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..b6ed45a
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,20 @@
+; This file is for unifying the coding style for different editors and IDEs.
+; More information at http://editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.bat]
+end_of_line = crlf
+
+[*.yml]
+indent_size = 2
+
+[Makefile]
+indent_style = tab
diff --git a/src/View/Helper/FormHelper.php b/src/View/Helper/FormHelper.php
index ebcc07e..94a80b6 100644
--- a/src/View/Helper/FormHelper.php
+++ b/src/View/Helper/FormHelper.php
@@ -13,6 +13,8 @@
 namespace Bootstrap\View\Helper;
 
 use Bootstrap\View\FlexibleStringTemplateTrait;
+use Cake\Utility\Hash;
+use Cake\View\View;
 
 /**
  * Form helper library.
@@ -21,7 +23,6 @@
  *
  * @property \Bootstrap\View\Helper\HtmlHelper $Html
  * @property \Cake\View\Helper\UrlHelper $Url
- *
  * @link http://book.cakephp.org/3.0/en/views/helpers/form.html
  */
 class FormHelper extends \Cake\View\Helper\FormHelper
@@ -40,68 +41,52 @@ class FormHelper extends \Cake\View\Helper\FormHelper
     ];
 
     /**
-     * Default configuration for the helper.
-     *
-     * - `idPrefix` See CakePHP `FormHelper`.
-     * - `errorClass` See CakePHP `FormHelper`. Overriden by `'has-error'`.
-     * - `typeMap` See CakePHP `FormHelper`.
-     * - `templates` Templates for the various form elements.
-     * - `templateClass` Class used to format the various template. Do not override!
-     * - `buttons` Default options for buttons.
-     * - `columns` Default column sizes for horizontal forms.
-     * - `useCustomFileInput` Set to `true` to use the custom file input. Default is `false`.
+     * Default configuration for this helper.
+     * Don't override parent::$_defaultConfig for robustness
      *
      * @var array
      */
-    protected $_defaultConfig = [
-        'idPrefix' => null,
+    protected $helperConfig = [
         'errorClass' => 'is-invalid',
-        'typeMap' => [
-            'string' => 'text', 'datetime' => 'datetime', 'boolean' => 'checkbox',
-            'timestamp' => 'datetime', 'text' => 'textarea', 'time' => 'time',
-            'date' => 'date', 'float' => 'number', 'integer' => 'number',
-            'decimal' => 'number', 'binary' => 'file', 'uuid' => 'string',
-        ],
-
         'templates' => [
-            'button' => '<button{{attrs}}>{{text}}</button>',
+            // Used for checkboxes in checkbox() and multiCheckbox().
             'checkbox' => '<input type="checkbox" class="form-check-input{{attrs.class}}" name="{{name}}" value="{{value}}"{{attrs}}>',
-            'checkboxFormGroup' => '{{label}}',
+            // Wrapper container for checkboxes.
             'checkboxWrapper' => '<div class="form-check">{{label}}</div>',
             'checkboxContainer' => '<div class="form-check checkbox{{required}}">{{content}}</div>',
             'checkboxContainerHorizontal' => '<div class="form-group row"><div class="{{labelColumnClass}}"></div><div class="{{inputColumnClass}}"><div class="form-check checkbox{{required}}">{{content}}</div></div></div>',
             'multicheckboxContainer' => '<fieldset class="form-group {{type}}{{required}}">{{content}}</fieldset>',
             'multicheckboxContainerHorizontal' => '<fieldset class="form-group {{type}}{{required}}"><div class="row">{{content}}</div></fieldset>','dateWidget' => '<div class="row">{{year}}{{month}}{{day}}{{hour}}{{minute}}{{second}}{{meridian}}</div>',
+            // Error message wrapper elements.
             'error' => '<div class="error-message invalid-feedback">{{content}}</div>',
             'errorInline' => '<div class="error-message invalid-feedback">{{content}}</div>',
-            'errorList' => '<ul>{{content}}</ul>',
-            'errorItem' => '<li>{{text}}</li>',
-            'file' => '<input type="file" name="{{name}}" {{attrs}}>',
-            'fieldset' => '<fieldset{{attrs}}>{{content}}</fieldset>',
-            'formStart' => '<form{{attrs}}>',
-            'formEnd' => '</form>',
+            // General grouping container for control(). Defines input/label ordering.
             'formGroup' => '{{label}}{{prepend}}{{input}}{{append}}',
             'formGroupHorizontal' => '{{label}}<div class="{{inputColumnClass}}">{{prepend}}{{input}}{{append}}{{error}}</div>',
-            'hiddenBlock' => '<div style="display:none;">{{content}}</div>',
+            // Generic input element.
             'input' => '<input type="{{type}}" name="{{name}}" class="form-control{{attrs.class}}" {{attrs}} />',
-            'inputSubmit' => '<input type="{{type}}"{{attrs}}>',
+            // Container element used by control().
             'inputContainer' => '<div class="form-group {{type}}{{required}}">{{content}}</div>',
             'inputContainerHorizontal' => '<div class="form-group row {{type}}{{required}}">{{content}}</div>',
+            // Container element used by control() when a field has an error.
             'inputContainerError' => '<div class="form-group has-error {{type}}{{required}}">{{content}}{{error}}</div>',
             'inputContainerErrorHorizontal' => '<div class="form-group row has-error {{type}}{{required}}">{{content}}</div>',
-            'label' => '<label{{attrs}}>{{text}}</label>',
+            // Label horizontal
             'labelHorizontal' => '<label class="col-form-label {{labelColumnClass}}{{attrs.class}}"{{attrs}}>{{text}}</label>',
+            // Label inline
             'labelInline' => '<label class="sr-only{{attrs.class}}"{{attrs}}>{{text}}</label>',
+            // Label element used for radio and multi-checkbox inputs.
             'nestingLabel' => '{{hidden}}<label class="form-check-label{{attrs.class}}"{{attrs}}>{{input}} {{text}}</label>',
-            'legend' => '<legend>{{text}}</legend>',
             'labelLegend' => '<label{{attrs}}>{{text}}</label>',
             'labelLegendHorizontal' => '<legend class="col-form-label pt-0 {{labelColumnClass}}{{attrs.class}}"{{attrs}}>{{text}}</legend>',
-            'option' => '<option value="{{value}}"{{attrs}}>{{text}}</option>',
-            'optgroup' => '<optgroup label="{{label}}"{{attrs}}>{{content}}</optgroup>',
-            'select' => '<select name="{{name}}" class="form-control{{attrs.class}}" {{attrs}}>{{content}}</select>',
-            'selectColumn' => '<div class="col-md-{{columnSize}}"><select name="{{name}}" class="form-control{{attrs.class}}" {{attrs}}>{{content}}</select></div>',
-            'selectMultiple' => '<select name="{{name}}[]" multiple="multiple" class="form-control{{attrs.class}}" {{attrs}}>{{content}}</select>',
+            // Select element,
+            'select' => '<select name="{{name}}" class="form-control{{attrs.class}}"{{attrs}}>{{content}}</select>',
+            'selectColumn' => '<div class="col-md-{{columnSize}}"><select name="{{name}}" class="form-control{{attrs.class}}"{{attrs}}>{{content}}</select></div>',
+            // Multi-select element,
+            'selectMultiple' => '<select name="{{name}}[]" multiple="multiple" class="form-control{{attrs.class}}"{{attrs}}>{{content}}</select>',
+            // Radio input element,
             'radio' => '<input type="radio" class="form-check-input{{attrs.class}}" name="{{name}}" value="{{value}}"{{attrs}}>',
+            // Wrapping container for radio input/label,
             'radioWrapper' => '<div class="form-check">{{label}}</div>',
             'radioContainer' => '<fieldset class="form-group {{type}}{{required}}">{{content}}</fieldset>',
             'radioContainerHorizontal' => '<fieldset class="form-group {{type}}{{required}}"><div class="row">{{content}}</div></fieldset>',
@@ -109,7 +94,9 @@ class FormHelper extends \Cake\View\Helper\FormHelper
             'inlineRadioWrapper' => '<div class="form-check form-check-inline">{{label}}</div>',
             'inlineradioContainer' => '<fieldset class="form-group {{type}}{{required}}">{{content}}</fieldset>',
             'inlineradioContainerHorizontal' => '<fieldset class="form-group {{type}}{{required}}"><div class="row">{{content}}</div></fieldset>',
-            'textarea' => '<textarea name="{{name}}" class="form-control{{attrs.class}}" {{attrs}}>{{value}}</textarea>',
+            // Textarea input element,
+            'textarea' => '<textarea name="{{name}}" class="form-control{{attrs.class}}"{{attrs}}>{{value}}</textarea>',
+            // Container for submit buttons.
             'submitContainer' => '<div class="form-group">{{content}}</div>',
             'submitContainerHorizontal' => '<div class="form-group row"><div class="{{labelColumnClass}}"></div><div class="{{inputColumnClass}}">{{content}}</div></div>',
 
@@ -123,7 +110,6 @@ class FormHelper extends \Cake\View\Helper\FormHelper
             'buttonGroupVertical' => '<div class="btn-group-vertical{{attrs.class}}" role="group"{{attrs}}>{{content}}</div>',
             'buttonToolbar' => '<div class="btn-toolbar{{attrs.class}}" role="toolbar"{{attrs}}>{{content}}</div>',
             'fancyFileInput' => '{{fileInput}}<div class="input-group"><div class="input-group-btn">{{button}}</div>{{input}}</div>',
-            'confirmJs' => '{{confirm}}',
         ],
         'buttons' => [
             'type' => 'primary',
@@ -138,25 +124,16 @@ class FormHelper extends \Cake\View\Helper\FormHelper
     ];
 
     /**
-     * Default widgets.
+     * Default widgets for this helper.
+     * Don't override parent::$_defaultWidgets for robustness
      *
      * @var array
      */
-    protected $_defaultWidgets = [
-        '_default' => ['Cake\View\Widget\BasicWidget'],
-        'button' => ['Cake\View\Widget\ButtonWidget'],
-        'checkbox' => ['Cake\View\Widget\CheckboxWidget'],
-        'file' => ['Cake\View\Widget\FileWidget'],
+    protected $helperWidgets = [
         'fancyFile' => ['Bootstrap\View\Widget\FancyFileWidget', 'file', 'button', 'basic'],
         'label' => ['Bootstrap\View\Widget\LabelLegendWidget'],
-        'nestingLabel' => ['Cake\View\Widget\NestingLabelWidget'],
-        'multicheckbox' => ['Cake\View\Widget\MultiCheckboxWidget', 'nestingLabel'],
-        'radio' => ['Cake\View\Widget\RadioWidget', 'nestingLabel'],
-        'inlineRadioNestingLabel' => ['Bootstrap\View\Widget\InlineRadioNestingLabelWidget'],
         'inlineRadio' => ['Bootstrap\View\Widget\InlineRadioWidget', 'nestingLabel'],
-        'select' => ['Cake\View\Widget\SelectBoxWidget'],
         'selectColumn' => ['Bootstrap\View\Widget\ColumnSelectBoxWidget'],
-        'textarea' => ['Cake\View\Widget\TextareaWidget'],
     ];
 
     /**
@@ -174,10 +151,16 @@ class FormHelper extends \Cake\View\Helper\FormHelper
     public $inline = false;
 
     /**
-     * {@inheritDoc}
+     * @inheritDoc
      */
-    public function __construct(\Cake\View\View $View, array $config = [])
+    public function __construct(View $View, array $config = [])
     {
+        // Default config. Use Hash::merge() to keep default values
+        $this->_defaultConfig = Hash::merge($this->_defaultConfig, $this->helperConfig);
+
+        // Default widgets. Use array_merge to avoid digit key problems
+        $this->_defaultWidgets = array_merge($this->_defaultWidgets, $this->helperWidgets);
+
         if (!isset($config['templateCallback'])) {
             $that = $this;
             $config['templateCallback'] = function ($name, $data) use ($that) {
@@ -188,8 +171,8 @@ public function __construct(\Cake\View\View $View, array $config = [])
                     $data['templateName'] .= 'Inline';
                 }
                 $data += [
-                    'inputColumnClass' => $this->_getColumnClass('input'),
-                    'labelColumnClass' => $this->_getColumnClass('label'),
+                    'inputColumnClass' => $this->getColumnClass('input'),
+                    'labelColumnClass' => $this->getColumnClass('label'),
                 ];
                 if (!$that->getTemplates($data['templateName'])) {
                     $data['templateName'] = $name;
@@ -268,9 +251,9 @@ public function getColumnSizes(): array
      * form helper.
      *
      * @param array $columns Array of columns options to set
-     * @return array
+     * @return $this
      */
-    public function setColumnSizes(array $columns): array
+    public function setColumnSizes(array $columns)
     {
         return $this->setConfig('columns', $columns, false);
     }
@@ -282,7 +265,7 @@ public function setColumnSizes(array $columns): array
      * @param string $what The type of the column (`'label'`, `'input'`, `'error'`).
      * @return string The classes for the size or offset of the specified column.
      */
-    protected function _getColumnClass(string $what): string
+    public function getColumnClass(string $what): string
     {
         $columns = $this->getConfig('columns');
         $classes = [];
@@ -310,7 +293,7 @@ protected function _getColumnClass(string $what): string
      * @param string $type Input group type
      * @return string|null The elements wrapped in a suitable HTML element.
      */
-    protected function _wrapInputGroup($addonOrButtons, string $type): ?string
+    protected function wrapInputGroup($addonOrButtons, string $type): ?string
     {
         if ($addonOrButtons) {
             if (is_array($addonOrButtons)) {
@@ -340,12 +323,12 @@ protected function _wrapInputGroup($addonOrButtons, string $type): ?string
      * Concatenates and wraps `$input`, `$prepend` and `$append` inside an input group.
      *
      * @param string $input The input content.
-     * @param string $prepend The content to prepend to `$input`.
-     * @param string $append The content to append to `$input`.
+     * @param string|null $prepend The content to prepend to `$input`.
+     * @param string|null $append The content to append to `$input`.
      * @return string A string containing the three elements concatenated an wrapped inside
      *                  an input group `<div>`.
      */
-    protected function _wrap(string $input, string $prepend, string $append): string
+    protected function formatWrap(string $input, ?string $prepend = null, ?string $append = null): string
     {
         return $this->formatTemplate('inputGroup', [
             'inputGroupStart' => $this->formatTemplate('inputGroupStart', [
@@ -363,18 +346,18 @@ protected function _wrap(string $input, string $prepend, string $append): string
      *
      * @param string|null $input Input to which `$prepend` will be prepend, or
      * null to create an opening input group.
-     * @param string|array $prepend The content to prepend.,
+     * @param string|array|null $prepend The content to prepend.,
      * @return string The input with the content of `$prepend` prepended or an
      * opening `<div>` for an input group.
      */
-    public function prepend(?string $input, $prepend): string
+    public function prepend(?string $input = null, $prepend = null): string
     {
-        $prepend = $this->_wrapInputGroup($prepend, 'prepend');
+        $prepend = $this->wrapInputGroup($prepend, 'prepend');
         if ($input === null) {
             return $this->formatTemplate('inputGroupStart', ['prepend' => $prepend]);
         }
 
-        return $this->_wrap($input, $prepend, null);
+        return $this->formatWrap($input, $prepend, null);
     }
 
     /**
@@ -386,14 +369,14 @@ public function prepend(?string $input, $prepend): string
      * @return string The input with the content of `$append` appended or a
      * closing `</div>` for an input group.
      */
-    public function append(?string $input, $append = null): string
+    public function append(?string $input = null, $append = null): string
     {
-        $append = $this->_wrapInputGroup($append, 'append');
+        $append = $this->wrapInputGroup($append, 'append');
         if ($input === null) {
             return $this->formatTemplate('inputGroupEnd', ['append' => $append]);
         }
 
-        return $this->_wrap($input, null, $append);
+        return $this->formatWrap($input, null, $append);
     }
 
     /**
@@ -505,7 +488,7 @@ public function control(string $fieldName, array $options = []): string
     }
 
     /**
-     * {@inheritDoc}
+     * @inheritDoc
      */
     protected function _getInput(string $fieldName, array $options)
     {
@@ -522,7 +505,7 @@ protected function _getInput(string $fieldName, array $options)
     }
 
     /**
-     * {@inheritDoc}
+     * @inheritDoc
      */
     protected function _inputLabel(string $fieldName, $label = null, array $options = []): string
     {
@@ -552,7 +535,6 @@ protected function _inputLabel(string $fieldName, $label = null, array $options
      * @param string $fieldName Name of a field, like this "modelname.fieldname"
      * @param array|\Traversable $options Radio button options array.
      * @param array $attributes Array of attributes.
-     *
      * @return string Completed radio widget set.
      */
     public function inlineRadio(string $fieldName, $options = [], array $attributes = []): string
@@ -715,7 +697,6 @@ public function buttonToolbar(array $buttonGroups, array $options = []): string
      * @param array $menu HTML elements corresponding to menu options (which will be wrapped
      * into `<li>` tag). To add separator, pass 'divider'. See `BootstrapHtml::dropdown()`.
      * @param array $options Array of options for the button. See `button()`.
-     *
      * @return string A HTML string containing the button dropdown.
      */
     public function dropdownButton(string $title, array $menu = [], array $options = []): string
diff --git a/tests/TestCase/View/Helper/FormHelperTest.php b/tests/TestCase/View/Helper/FormHelperTest.php
index e0bec67..c1165e2 100644
--- a/tests/TestCase/View/Helper/FormHelperTest.php
+++ b/tests/TestCase/View/Helper/FormHelperTest.php
@@ -13,9 +13,9 @@
 namespace Bootstrap\Test\TestCase\View\Helper;
 
 use Bootstrap\View\Helper\FormHelper;
-use Cake\Core\Configure;
 use Cake\Http\ServerRequest;
 use Cake\TestSuite\TestCase;
+use Cake\Utility\Inflector;
 use Cake\View\View;
 
 class FormHelperTest extends TestCase
@@ -28,10 +28,20 @@ class FormHelperTest extends TestCase
     /**
      * Instance of FormHelper.
      *
-     * @var FormHelper
+     * @var \Bootstrap\View\Helper\FormHelper
      */
     public $form;
 
+    /**
+     * @var string[]
+     */
+    private $dateRegex;
+
+    /**
+     * @var array
+     */
+    private $article;
+
     /**
      * Setup
      *
@@ -79,14 +89,54 @@ public function setUp(): void
                 'title' => true,
             ],
         ];
+    }
+
+    /**
+     * @test
+     */
+    public function testLoadHelperWithConfiguration()
+    {
+        $this->View->loadHelper('Form', [
+            'className' => 'Bootstrap.Form',
+            'templates' => ['checkboxFormGroup' => '<testing>{{label}}</testing>'],
+            'widgets' => [
+                // override select
+                'select' => ['Textarea'],
+            ]
+        ]);
+        $helper = $this->View->Form;
 
-        Configure::write('debug', true);
+        // \Cake\View\Helper\FormHelper configuration is untouched
+        self::assertSame('<button{{attrs}}>{{text}}</button>', $helper->getConfig('templates.button'));
+
+        // \Bootstrap\View\Helper\FormHelper default configuration is loaded
+        self::assertSame('{{append}}</div>', $helper->getConfig('templates.inputGroupEnd'));
+
+        // Custom configuration correctly applied
+        self::assertSame('<testing>{{label}}</testing>', $helper->getConfig('templates.checkboxFormGroup'));
+
+        $widgets = $helper->getWidgetLocator();
+
+        // \Cake\View\Helper\FormHelper widgets are untouched
+        self::assertInstanceOf('Cake\View\Widget\DateTimeWidget', $widgets->get('datetime'));
+
+        // \Bootstrap\View\Helper\FormHelper default widgets are set
+        self::assertInstanceOf('Bootstrap\View\Widget\FancyFileWidget', $widgets->get('fancyFile'));
+        self::assertInstanceOf('Bootstrap\View\Widget\LabelLegendWidget', $widgets->get('label'));
+        self::assertInstanceOf('Bootstrap\View\Widget\InlineRadioWidget', $widgets->get('inlineRadio'));
+        self::assertInstanceOf('Bootstrap\View\Widget\ColumnSelectBoxWidget', $widgets->get('selectColumn'));
+
+        // Custom widgets are correctly applied
+        self::assertInstanceOf('Cake\View\Widget\TextareaWidget', $widgets->get('select'));
     }
 
+    /**
+     * @test
+     */
     public function testCreate()
     {
         // Standard form
-        $this->assertHtml([
+        self::assertHtml([
             ['form' => [
                 'method',
                 'accept-charset',
@@ -94,16 +144,19 @@ public function testCreate()
                 'action',
             ]],
         ], $this->form->create());
+
         // Horizontal form
-        $result = $this->form->create(null, ['horizontal' => true]);
-        $this->assertEquals($this->form->horizontal, true);
-        // Automatically return to non horizonal form
-        $result = $this->form->create();
-        $this->assertEquals($this->form->horizontal, false);
+        $this->form->create(null, ['horizontal' => true]);
+        self::assertEquals(true, $this->form->horizontal);
+
+        // Automatically return to non horizontal form
+        $this->form->create();
+        self::assertEquals(false, $this->form->horizontal);
+
         // Inline form
         $result = $this->form->create(null, ['inline' => true]);
-        $this->assertEquals($this->form->inline, true);
-        $this->assertHtml([
+        self::assertEquals(true, $this->form->inline);
+        self::assertHtml([
             ['form' => [
                 'method',
                 'accept-charset',
@@ -112,11 +165,15 @@ public function testCreate()
                 'class' => 'form-inline',
             ]],
         ], $result);
-        // Automatically return to non horizonal form
-        $result = $this->form->create();
-        $this->assertEquals($this->form->inline, false);
+
+        // Automatically return to non horizontal form
+        $this->form->create();
+        self::assertEquals(false, $this->form->inline);
     }
 
+    /**
+     * @test
+     */
     public function testColumnSizes()
     {
         $this->form->setConfig('columns', [
@@ -153,7 +210,7 @@ public function testColumnSizes()
             '/div',
             '/div',
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         $this->article['errors'] = [
             'Article' => [
@@ -201,14 +258,17 @@ public function testColumnSizes()
             '/div',
             '/div',
         ];
-        $this->assertHtml($expected, $result, true);
+        self::assertHtml($expected, $result, true);
     }
 
+    /**
+     * @test
+     */
     public function testButton()
     {
         // default button
         $button = $this->form->button('Test');
-        $this->assertHtml([
+        self::assertHtml([
             ['button' => [
                 'class' => 'btn btn-primary',
                 'type' => 'submit',
@@ -219,7 +279,7 @@ public function testButton()
             'bootstrap-type' => 'success',
             'bootstrap-size' => 'sm',
         ]);
-        $this->assertHtml([
+        self::assertHtml([
             ['button' => [
                 'class' => 'btn btn-success btn-sm',
                 'type' => 'submit',
@@ -230,7 +290,7 @@ public function testButton()
             'btype' => 'success',
             'size' => 'sm',
         ]);
-        $this->assertHtml([
+        self::assertHtml([
             ['button' => [
                 'class' => 'btn btn-success btn-sm',
                 'type' => 'submit',
@@ -240,7 +300,7 @@ public function testButton()
         $button = $this->form->button('Test', [
             'class' => 'btn btn-primary',
         ]);
-        $this->assertHtml([
+        self::assertHtml([
             ['button' => [
                 'class' => 'btn btn-primary',
                 'type' => 'submit',
@@ -248,27 +308,38 @@ public function testButton()
         ], $button);
     }
 
+    /**
+     * @test
+     */
     public function testCustomFunctions()
     {
-        $this->assertEquals(
+        self::assertEquals(
             $this->form->cbutton('b', ['class' => 'cl']),
             $this->form->button('b', ['class' => 'cl'])
         );
-        $this->assertEquals(
+        self::assertEquals(
             $this->form->cbutton('b', 'danger', ['class' => 'cl']),
             $this->form->button('b', ['class' => 'cl', 'btype' => 'danger'])
         );
-        $this->assertEquals(
+        self::assertEquals(
             $this->form->csubmit('b', ['class' => 'cl']),
             $this->form->submit('b', ['class' => 'cl'])
         );
-        $this->assertEquals(
+        self::assertEquals(
             $this->form->csubmit('b', 'danger', ['class' => 'cl']),
             $this->form->submit('b', ['class' => 'cl', 'btype' => 'danger'])
         );
     }
 
-    protected function _testInput($expected, $fieldName, $options = [], $debug = false)
+    /**
+     * Check Form::control() output
+     *
+     * @param  array $expected Expected Html
+     * @param  string $fieldName Field name
+     * @param  array $options Field options
+     * @param  bool $debug Activate Html debug mode
+     */
+    public function assertControl(array $expected, string $fieldName, array $options = [], bool $debug = false)
     {
         $formOptions = [];
         if (isset($options['_formOptions'])) {
@@ -277,21 +348,24 @@ protected function _testInput($expected, $fieldName, $options = [], $debug = fal
         }
         $this->form->create(null, $formOptions);
         $result = $this->form->control($fieldName, $options);
-        $assert = $this->assertHtml($expected, $result, $debug);
+        self::assertHtml($expected, $result, $debug);
     }
 
+    /**
+     * @test
+     */
     public function testInput()
     {
         $fieldName = 'field';
         // Standard form
-        $this->_testInput([
+        $this->assertControl([
             ['div' => [
                 'class' => 'form-group text',
             ]],
             ['label' => [
                 'for' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['input' => [
                 'type' => 'text',
@@ -302,7 +376,7 @@ public function testInput()
             '/div',
         ], $fieldName);
         // Horizontal form
-        $this->_testInput([
+        $this->assertControl([
             ['div' => [
                 'class' => 'form-group row text',
             ]],
@@ -310,7 +384,7 @@ public function testInput()
                 'class' => 'col-form-label col-md-2',
                 'for' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['div' => [
                 'class' => 'col-md-10',
@@ -328,17 +402,20 @@ public function testInput()
         ]);
     }
 
+    /**
+     * @test
+     */
     public function testInputText()
     {
         $fieldName = 'field';
-        $this->_testInput([
+        $this->assertControl([
             ['div' => [
                 'class' => 'form-group text',
             ]],
             ['label' => [
                 'for' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['input' => [
                 'type' => 'text',
@@ -350,6 +427,9 @@ public function testInputText()
         ], $fieldName, ['type' => 'text']);
     }
 
+    /**
+     * @test
+     */
     public function testButtonGroup()
     {
         // Basic test:
@@ -361,7 +441,7 @@ public function testButtonGroup()
             ['button' => ['class' => 'btn btn-primary', 'type' => 'submit']], '2', '/button',
             '/div',
         ];
-        $this->assertHtml($expected, $this->form->buttonGroup([
+        self::assertHtml($expected, $this->form->buttonGroup([
             $this->form->button('1'), $this->form->button('2'),
         ]));
 
@@ -374,7 +454,7 @@ public function testButtonGroup()
             ['button' => ['class' => 'btn btn-primary', 'type' => 'submit']], '2', '/button',
             '/div',
         ];
-        $this->assertHtml($expected, $this->form->buttonGroup([
+        self::assertHtml($expected, $this->form->buttonGroup([
             $this->form->button('1'), $this->form->button('2'),
         ], ['class' => 'myclass', 'data-test' => 'mydata']));
 
@@ -387,11 +467,14 @@ public function testButtonGroup()
             ['button' => ['class' => 'btn btn-primary', 'type' => 'submit']], '2', '/button',
             '/div',
         ];
-        $this->assertHtml($expected, $this->form->buttonGroup([
+        self::assertHtml($expected, $this->form->buttonGroup([
             $this->form->button('1'), $this->form->button('2'),
         ], ['class' => 'myclass', 'data-test' => 'mydata', 'vertical' => true]));
     }
 
+    /**
+     * @test
+     */
     public function testInputRadio()
     {
         $fieldName = 'color';
@@ -409,7 +492,7 @@ public function testInputRadio()
                 'class' => 'form-group radio',
             ]],
             ['label' => []],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['input' => [
                 'type' => 'hidden',
@@ -440,7 +523,7 @@ public function testInputRadio()
             ]);
         }
         $expected = array_merge($expected, ['/fieldset']);
-        $this->_testInput($expected, $fieldName, $options);
+        $this->assertControl($expected, $fieldName, $options);
 
         // Inline
         $options += [
@@ -451,7 +534,7 @@ public function testInputRadio()
                 'class' => 'form-group inlineradio',
             ]],
             ['label' => [ ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['input' => [
                 'type' => 'hidden',
@@ -482,7 +565,7 @@ public function testInputRadio()
             ]);
         }
         $expected = array_merge($expected, ['/fieldset']);
-        $this->_testInput($expected, $fieldName, $options);
+        $this->assertControl($expected, $fieldName, $options);
 
         // Horizontal
         $options += [
@@ -499,7 +582,7 @@ public function testInputRadio()
             ['legend' => [
                 'class' => 'col-form-label pt-0 col-md-2',
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/legend',
             ['div' => [
                 'class' => 'col-md-10',
@@ -533,7 +616,7 @@ public function testInputRadio()
             ]);
         }
         $expected = array_merge($expected, ['/div', '/div', '/fieldset']);
-        $this->_testInput($expected, $fieldName, $options);
+        $this->assertControl($expected, $fieldName, $options);
 
         // Horizontal + Inline
         $options['inline'] = true;
@@ -547,7 +630,7 @@ public function testInputRadio()
             ['legend' => [
                 'class' => 'col-form-label pt-0 col-md-2',
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/legend',
             ['div' => [
                 'class' => 'col-md-10',
@@ -581,9 +664,12 @@ public function testInputRadio()
             ]);
         }
         $expected = array_merge($expected, ['/div', '/div', '/fieldset']);
-        $this->_testInput($expected, $fieldName, $options);
+        $this->assertControl($expected, $fieldName, $options);
     }
 
+    /**
+     * @test
+     */
     public function testInputCheckbox()
     {
         $fieldName = 'color';
@@ -612,11 +698,11 @@ public function testInputCheckbox()
                 'value' => "1",
                 'id' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options);
+        $this->assertControl($expected, $fieldName, $options);
 
         // Horizontal
         $expected = [
@@ -647,17 +733,20 @@ public function testInputCheckbox()
                 'value' => "1",
                 'id' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             '/div',
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + [
+        $this->assertControl($expected, $fieldName, $options + [
             '_formOptions' => ['horizontal' => true],
         ], true);
     }
 
+    /**
+     * @test
+     */
     public function testInputGroup()
     {
         $fieldName = 'field';
@@ -691,7 +780,7 @@ public function testInputGroup()
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + ['prepend' => '@']);
+        $this->assertControl($expected, $fieldName, $options + ['prepend' => '@']);
         // Test with append
         $expected = [
             ['div' => [
@@ -718,7 +807,7 @@ public function testInputGroup()
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + ['append' => '.00']);
+        $this->assertControl($expected, $fieldName, $options + ['append' => '.00']);
         // Test with append + prepend
         $expected = [
             ['div' => [
@@ -754,7 +843,7 @@ public function testInputGroup()
             '/div',
             '/div',
         ];
-        $this->_testInput(
+        $this->assertControl(
             $expected,
             $fieldName,
             $options + ['prepend' => '$', 'append' => '.00']
@@ -787,7 +876,7 @@ public function testInputGroup()
             '/div',
         ];
 
-        $this->_testInput(
+        $this->assertControl(
             $expected,
             $fieldName,
             $options + ['prepend' => $this->form->button('Go!')]
@@ -820,7 +909,7 @@ public function testInputGroup()
             '/div',
             '/div',
         ];
-        $this->_testInput(
+        $this->assertControl(
             $expected,
             $fieldName,
             $options + ['append' => $this->form->button('Go!')]
@@ -858,11 +947,14 @@ public function testInputGroup()
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + [
+        $this->assertControl($expected, $fieldName, $options + [
             'append' => [$this->form->button('Go!'), $this->form->button('GoGo!')],
         ]);
     }
 
+    /**
+     * @test
+     */
     public function testAppendDropdown()
     {
         $fieldName = 'field';
@@ -912,7 +1004,7 @@ public function testAppendDropdown()
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + [
+        $this->assertControl($expected, $fieldName, $options + [
             'append' => $this->form->dropdownButton('Action', [
                 ['item' => ['title' => 'Link 1', 'url' => '#']],
                 ['item' => ['title' => 'Link 2', 'url' => '#']],
@@ -963,7 +1055,7 @@ public function testAppendDropdown()
             '/div',
             '/div',
         ];
-        $this->_testInput($expected, $fieldName, $options + [
+        $this->assertControl($expected, $fieldName, $options + [
             'append' => $this->form->dropdownButton('Action', [
                 ['item' => ['title' => 'Link 1', 'url' => '#']],
                 ['item' => ['title' => 'Link 2', 'url' => '#']],
@@ -973,6 +1065,9 @@ public function testAppendDropdown()
         ]);
     }
 
+    /**
+     * @test
+     */
     public function testInputTemplateVars()
     {
         $fieldName = 'field';
@@ -982,14 +1077,14 @@ public function testInputTemplateVars()
             'inputContainer' => '<div class="form-group {{type}}{{required}}">{{content}}<span>{{help}}</span></div>',
         ]);
         // Standard form
-        $this->_testInput([
+        $this->assertControl([
             ['div' => [
                 'class' => 'form-group text',
             ]],
             ['label' => [
                 'for' => $fieldName,
             ]],
-            \Cake\Utility\Inflector::humanize($fieldName),
+            Inflector::humanize($fieldName),
             '/label',
             ['input' => [
                 'type' => 'text',
@@ -1004,23 +1099,26 @@ public function testInputTemplateVars()
         ], $fieldName, ['templateVars' => ['help' => $help]]);
     }
 
+    /**
+     * @test
+     */
     public function testDateTime()
     {
         extract($this->dateRegex);
 
-        $now = strtotime('now');
         $result = $this->form->dateTime('Contact.date');
         $expected = [
             ['input' => [
                 'type' => 'datetime-local',
                 'name' => 'Contact[date]',
                 'class' => 'form-control',
+                'step' => '1',
+                'value' => '',
             ]],
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         // Test with input()
-        $now = strtotime('now');
         $result = $this->form->control('Contact.date', ['type' => 'date']);
         $expected = [
             ['div' => [
@@ -1034,12 +1132,16 @@ public function testDateTime()
                 'name' => 'Contact[date]',
                 'class' => 'form-control',
                 'id' => 'contact-date',
+                'value' => '',
             ]],
             '/div',
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
     }
 
+    /**
+     * @test
+     */
     public function testSubmit()
     {
         $this->form->horizontal = false;
@@ -1053,7 +1155,7 @@ public function testSubmit()
             ]],
             '/div',
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         // horizontal forms
         $this->form->horizontal = true;
@@ -1070,42 +1172,43 @@ public function testSubmit()
             '/div',
             '/div',
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
     }
 
+    /**
+     * @test
+     */
     public function testCustomFileInput()
     {
         $this->form->setConfig('useCustomFileInput', true);
         $result = $this->form->file('Contact.picture');
         $expected = [
-            ['input' => [
-                'type' => 'file',
-                'name' => 'Contact[picture]',
-                'id' => 'Contact[picture]',
-                'style' => 'display: none;',
-                'onchange' => "document.getElementById('Contact[picture]-input').value = (this.files.length <= 1) ? (this.files.length ? this.files[0].name : '') : this.files.length + ' ' + 'files selected';",
-            ]],
-            ['div' => ['class' => 'input-group']],
-            ['div' => ['class' => 'input-group-btn']],
-            ['button' => [
-                'class' => 'btn btn-primary',
-                'type' => 'button',
-                'onclick' => "document.getElementById('Contact[picture]').click();",
-            ]],
-            __('Choose File'),
-            '/button',
-            '/div',
-            ['input' => [
-                'type' => 'text',
-                'name' => 'Contact[picture-text]',
-                'class' => 'form-control',
-                'readonly' => 'readonly',
-                'id' => 'Contact[picture]-input',
-                'onclick' => "document.getElementById('Contact[picture]').click();",
-            ]],
-            '/div',
+            [
+                'input' => [
+                    'type' => 'file',
+                    'name' => 'Contact[picture]',
+                    'id' => 'Contact[picture]',
+                    'style' => 'display: none;',
+                    'onchange' => "document.getElementById('Contact[picture]-input').value = (this.files.length <= 1) ? (this.files.length ? this.files[0].name : '') : this.files.length + ' ' + 'files selected';",
+                ],
+            ], ['div' => ['class' => 'input-group']], ['div' => ['class' => 'input-group-btn']], [
+                'button' => [
+                    'class' => 'btn btn-primary',
+                    'type' => 'button',
+                    'onclick' => "document.getElementById('Contact[picture]').click();",
+                ],
+            ], __('Choose File'), '/button', '/div', [
+                'input' => [
+                    'type' => 'text',
+                    'name' => 'Contact[picture-text]',
+                    'class' => 'form-control',
+                    'readonly' => 'readonly',
+                    'id' => 'Contact[picture]-input',
+                    'onclick' => "document.getElementById('Contact[picture]').click();",
+                ],
+            ], '/div'
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         $result = $this->form->file('Contact.picture', ['multiple' => true]);
         $expected = [
@@ -1137,9 +1240,12 @@ public function testCustomFileInput()
             ]],
             '/div',
         ];
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
     }
 
+    /**
+     * @test
+     */
     public function testUploadCustomFileInput()
     {
         $expected = [
@@ -1173,23 +1279,26 @@ public function testUploadCustomFileInput()
         $this->form->setConfig('useCustomFileInput', true);
 
         $result = $this->form->file('Contact.picture');
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         $this->form->getView()->setRequest($this->form->getView()->getRequest()->withData('Contact.picture', [
             'name' => '', 'type' => '', 'tmp_name' => '',
             'error' => 4, 'size' => 0,
         ]));
         $result = $this->form->file('Contact.picture');
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
 
         $this->form->getView()->setRequest($this->form->getView()->getRequest()->withData(
             'Contact.picture',
             'no data should be set in value'
         ));
         $result = $this->form->file('Contact.picture');
-        $this->assertHtml($expected, $result);
+        self::assertHtml($expected, $result);
     }
 
+    /**
+     * @test
+     */
     public function testFormSecuredFileControl()
     {
         $this->View->setRequest($this->View->getRequest()->withAttribute('formTokenData', [
@@ -1204,6 +1313,6 @@ public function testFormSecuredFileControl()
 
         $tokenData = $this->form->getFormProtector()->buildTokenData();
 
-        $this->assertSame('949a50880781bda6c5c21f4ef7e82548c682b7e8%3A', $tokenData['fields']);
+        self::assertSame('949a50880781bda6c5c21f4ef7e82548c682b7e8%3A', $tokenData['fields']);
     }
 }