Fix check if a default value exist to determine property nullability (fixes #43)

Author: wol-soft

src/Utils/RenderHelper.php

@@ -127,7 +127,7 @@ public function isPropertyNullable(PropertyInterface $property, bool $outputType
     {
         return !$property->isRequired()
             && ($outputType || $this->generatorConfiguration->isImplicitNullAllowed())
-            && !($property->getDefaultValue() && !$this->generatorConfiguration->isImplicitNullAllowed());
+            && !($property->getDefaultValue() !== null && !$this->generatorConfiguration->isImplicitNullAllowed());
     }
 
     public function getType(PropertyInterface $property, bool $outputType = false): string

tests/Basic/DefaultValueTest.php

@@ -44,7 +44,7 @@ public function testTypedPropertyTypeHintsWithImplicitNullEnabledAcceptNull(): v
     {
         $className = $this->generateClassFromFileTemplate(
             'DefaultValueTypedProperty.json',
-            ['"integer"', 10],
+            ['"integer"', 0],
             (new GeneratorConfiguration())->setImmutable(false),
             false
         );
@@ -70,7 +70,7 @@ public function testTypedPropertyTypeHintsWithImplicitNullDisabledDeclinesNull()
     {
         $className = $this->generateClassFromFileTemplate(
             'DefaultValueTypedProperty.json',
-            ['"integer"', 10],
+            ['"integer"', 0],
             (new GeneratorConfiguration())->setImmutable(false),
             false,
             false