Cleaned up code

.travis.yml

@@ -14,7 +14,7 @@ script:
   - mkdir -p build/logs
   - php vendor/bin/phpunit --coverage-clover build/logs/clover.xml
 
-after_script:
-  - travis_retry php vendor/bin/coveralls
+after_success:
+  - travis_retry php vendor/bin/php-coveralls -v
   - wget https://scrutinizer-ci.com/ocular.phar
   - php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml

src/PHPHtmlParser/Contracts/DomInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PHPHtmlParser\Contracts;
+
+use PHPHtmlParser\Dom;
+use PHPHtmlParser\Options;
+use Psr\Http\Client\ClientInterface;
+use Psr\Http\Message\RequestInterface;
+
+interface DomInterface
+{
+    public function loadFromFile(string $file, ?Options $options = null): Dom;
+
+    public function loadFromUrl(string $url, ?Options $options, ?ClientInterface $client = null, ?RequestInterface $request = null): Dom;
+
+    public function loadStr(string $str, ?Options $options = null): Dom;
+
+    public function setOptions(Options $options): Dom;
+
+    public function find(string $selector, int $nth = null);
+}

src/PHPHtmlParser/Dom.php

@@ -6,6 +6,7 @@
 
 use GuzzleHttp\Psr7\Request;
 use Http\Adapter\Guzzle6\Client;
+use PHPHtmlParser\Contracts\DomInterface;
 use PHPHtmlParser\Dom\AbstractNode;
 use PHPHtmlParser\Dom\Collection;
 use PHPHtmlParser\Dom\HtmlNode;
@@ -27,7 +28,7 @@
 /**
  * Class Dom.
  */
-class Dom
+class Dom implements DomInterface
 {
     /**
      * Contains the root node of this dom tree.
@@ -450,7 +451,7 @@ private function parse(): void
         $activeNode = $this->root;
         while ($activeNode !== null) {
             if ($activeNode && $activeNode->tag->name() === 'script'
-                && $this->options->isCleanupInput() != true
+                && $this->options->isCleanupInput() !== true
             ) {
                 $str = $this->content->copyUntil('</');
             } else {

src/PHPHtmlParser/Dom/InnerNode.php

@@ -98,6 +98,7 @@ public function countChildren(): int
      *
      * @throws ChildNotFoundException
      * @throws CircularException
+     * @throws LogicalException
      */
     public function addChild(AbstractNode $child, int $before = -1): bool
     {
@@ -158,6 +159,10 @@ public function addChild(AbstractNode $child, int $before = -1): bool
 
         // add the child
         $combination = \array_combine($keys, $children);
+        if ($combination === false) {
+            // The number of elements for each array isn't equal or if the arrays are empty.
+            throw new LogicalException('array combine failed during add child method call.');
+        }
         $this->children = $combination;
 
         // tell child I am the new parent
@@ -300,6 +305,8 @@ public function isChild(int $id): bool
     /**
      * Removes the child with id $childId and replace it with the new child
      * $newChild.
+     *
+     * @throws LogicalException
      */
     public function replaceChild(int $childId, AbstractNode $newChild): void
     {
@@ -312,6 +319,10 @@ public function replaceChild(int $childId, AbstractNode $newChild): void
         $index = \array_search($childId, $keys, true);
         $keys[$index] = $newChild->id();
         $combination = \array_combine($keys, $this->children);
+        if ($combination === false) {
+            // The number of elements for each array isn't equal or if the arrays are empty.
+            throw new LogicalException('array combine failed during replace child method call.');
+        }
         $this->children = $combination;
         $this->children[$newChild->id()] = [
             'prev' => $oldChild['prev'],

src/PHPHtmlParser/Selector/Seeker.php

@@ -63,12 +63,12 @@ public function seek(array $nodes, RuleDTO $rule, array $options): array
                 }
 
                 $pass = $this->checkTag($rule, $child);
-                if ($pass && $rule->getKey() != null) {
+                if ($pass && $rule->getKey() !== null) {
                     $pass = $this->checkKey($rule, $child);
                 }
                 if ($pass &&
-                    $rule->getKey() != null &&
-                    $rule->getValue() != null &&
+                    $rule->getKey() !== null &&
+                    $rule->getValue() !== null &&
                     $rule->getValue() != '*'
                 ) {
                     $pass = $this->checkComparison($rule, $child);
@@ -238,8 +238,9 @@ private function checkNodeValue(
     ): bool {
         $check = false;
         if (
-            $rule->getValue() != null &&
-            \is_string($rule->getValue())
+            $rule->getValue() !== null &&
+            \is_string($rule->getValue()) &&
+            $nodeValue !== null
         ) {
             $check = $this->match($rule->getOperator(), $rule->getValue(), $nodeValue);
         }

src/PHPHtmlParser/Selector/Selector.php

@@ -48,8 +48,6 @@ public function __construct(string $selector, ?ParserInterface $parser = null, ?
 
     /**
      * Returns the selectors that where found in __construct.
-     *
-     * @return array
      */
     public function getParsedSelectorCollectionDTO(): ParsedSelectorCollectionDTO
     {

tests/Selector/SeekerTest.php

@@ -19,7 +19,7 @@ public function testSeekReturnEmptyArray()
             'alterNext' => false,
         ]);
         $seeker = new Seeker();
-        $results = $seeker->seek([], $ruleDTO, [], false);
+        $results = $seeker->seek([], $ruleDTO, []);
         $this->assertCount(0, $results);
     }
 }