Container: component name may be number or null

Author: dg

src/ComponentModel/Container.php

@@ -40,6 +40,9 @@ public function addComponent(IComponent $component, ?string $name, string $inser
 	{
 		if ($name === null) {
 			$name = $component->getName();
+			if ($name === null) {
+				throw new Nette\InvalidStateException("Missing component's name.");
+			}
 		}
 
 		if (!preg_match(self::NAME_REGEXP, $name)) {
@@ -65,7 +68,7 @@ public function addComponent(IComponent $component, ?string $name, string $inser
 		if (isset($this->components[$insertBefore])) {
 			$tmp = [];
 			foreach ($this->components as $k => $v) {
-				if ($k === $insertBefore) {
+				if ((string) $k === $insertBefore) {
 					$tmp[$name] = $component;
 				}
 				$tmp[$k] = $v;
@@ -136,7 +139,7 @@ final public function getComponent(string $name, bool $throw = true): ?IComponen
 
 		} elseif ($throw) {
 			$hint = Nette\Utils\ObjectHelpers::getSuggestion(array_merge(
-				array_keys($this->components),
+				array_map('strval', array_keys($this->components)),
 				array_map('lcfirst', preg_filter('#^createComponent([A-Z0-9].*)#', '$1', get_class_methods($this)))
 			), $name);
 			throw new Nette\InvalidArgumentException("Component with name '$name' does not exist" . ($hint ? ", did you mean '$hint'?" : '.'));

tests/ComponentModel/Container.suggestions.phpt

@@ -38,6 +38,7 @@ class TestContainer extends Container
 
 $cont = new TestContainer;
 $cont->addComponent(new TestContainer, 'form');
+$cont->addComponent(new TestContainer, '0');
 
 Assert::exception(function () use ($cont) {
 	$comp = $cont->getComponent('from');

tests/ComponentModel/Container.zeroname.phpt

@@ -14,5 +14,12 @@ require __DIR__ . '/../bootstrap.php';
 
 
 $container = new Container;
-$container->addComponent(new Container, '0');
+$container->addComponent($c0 = new Container, '0');
+Assert::same($c0, $container->getComponent('0'));
 Assert::same('0', $container->getComponent('0')->getName());
+
+$container->addComponent($c1 = new Container, '1', '0');
+Assert::same(
+	[1 => $c1, 0 => $c0],
+	(array) $container->getComponents()
+);