Adds not equals filter

Author: Westin Shafer

src/Constant/Filter.php

@@ -5,6 +5,7 @@
 final class Filter
 {
     public const EQUALS = 'eq';
+    public const NOT_EQUALS = 'neq';
     public const LESS_THEN_OR_EQUAL = 'lte';
     public const LESS_THEN = 'lt';
     public const GREATER_THAN = 'gt';

src/Service/FilterFactory.php

@@ -18,6 +18,8 @@ public function createFilter(string $column, string $filter, Value $value, strin
         switch (mb_strtolower($filter)) {
             case Filter::EQUALS:
                 return new FilterWithOperator($column, $value, '=', $title ?? Filter::EQUALS);
+            case Filter::NOT_EQUALS:
+                return new FilterWithOperator($column, $value, '!=', $title ?? Filter::NOT_EQUALS);
             case Filter::GREATER_THAN:
                 return new FilterWithOperator($column, $value, '>', $title ?? Filter::GREATER_THAN);
             case Filter::LESS_THEN:

tests/Service/FilterFactoryTest.php

@@ -55,6 +55,7 @@ public function provideFilters(): array
         return [
             // filter, expectedFilterClass, ?expectedTitle, ?rawValue, ?expectedValue
             'eq' => ['eq', FilterWithOperator::class],
+            'neq' => ['neq', FilterWithOperator::class],
             'gt' => ['gt', FilterWithOperator::class],
             'gte' => ['gte', FilterWithOperator::class],
             'lt' => ['lt', FilterWithOperator::class],