chore: force default to empty

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/Sign/JSignParam.php

@@ -7,14 +7,14 @@
  */
 class JSignParam
 {
-    private ?string $pdf = null;
-    private ?string $certificate = null;
-    private ?string $password = null;
+    private string $pdf = '';
+    private string $certificate = '';
+    private string $password = '';
     private string $pathPdfSigned = '';
     private string $JSignParameters = "-a -kst PKCS12";
     private bool $isUseJavaInstalled = false;
     private string $javaPath = '';
-    private ?string $tempPath = null;
+    private string $tempPath = '';
     private string $tempName = '';
     private bool $isOutputTypeBase64 = false;
     private string $jSignPdfJarPath;
@@ -34,7 +34,7 @@ public static function instance(): self
         return new self();
     }
 
-    public function getPdf(): ?string
+    public function getPdf(): string
     {
         return $this->pdf;
     }
@@ -45,7 +45,7 @@ public function setPdf(?string $pdf): self
         return $this;
     }
 
-    public function getCertificate(): ?string
+    public function getCertificate(): string
     {
         return $this->certificate;
     }
@@ -56,7 +56,7 @@ public function setCertificate(?string $certificate): self
         return $this;
     }
 
-    public function getPassword(): ?string
+    public function getPassword(): string
     {
         return $this->password;
     }
@@ -89,7 +89,7 @@ public function setJSignParameters(string $JSignParameters): self
         return $this;
     }
 
-    public function getTempPath(): ?string
+    public function getTempPath(): string
     {
         return $this->tempPath;
     }

src/Sign/JSignService.php

@@ -167,8 +167,8 @@ private function isPasswordCertificateValid(JSignParam $params): bool
      */
     private function pkcs12Read(JSignParam $params): array
     {
-        $certificate = (string) $params->getCertificate();
-        $password = (string) $params->getPassword();
+        $certificate = $params->getCertificate();
+        $password = $params->getPassword();
         if (openssl_pkcs12_read($certificate, $certInfo, $password)) {
             $this->repackCertificateIfPasswordIsUnicode($params, $certInfo['cert'], $certInfo['pkey']);
             return $certInfo;

tests/JSignPDFTest.php

@@ -162,31 +162,31 @@ public function testWithWhenResponseIsBase64()
         $this->assertEquals(base64_encode('signed file content'), $signedContent);
     }
 
-    public function testSignWhenCertificateIsNull()
+    public function testSignWhenCertificateIsEmpty()
     {
         $this->expectExceptionMessage('Certificate is Empty or Invalid.');
-        $params = JSignParamBuilder::instance()->withDefault()->setCertificate(null);
+        $params = JSignParamBuilder::instance()->withDefault()->setCertificate('');
         $this->service->sign($params);
     }
 
-    public function testSignWhenPdfIsNull()
+    public function testSignWhenPdfIsEmpty()
     {
         $this->expectExceptionMessage('PDF is Empty or Invalid.');
-        $params = JSignParamBuilder::instance()->withDefault()->setPdf(null);
+        $params = JSignParamBuilder::instance()->withDefault()->setPdf('');
         $this->service->sign($params);
     }
 
-    public function testSignWhenPasswordIsNull()
+    public function testSignWhenPasswordIsEmpty()
     {
         $this->expectExceptionMessage('Certificate Password is Empty.');
-        $params = JSignParamBuilder::instance()->withDefault()->setPassword(null);
+        $params = JSignParamBuilder::instance()->withDefault()->setPassword('');
         $this->service->sign($params);
     }
 
     public function testSignWhenTempPathIsInvalid()
     {
         $this->expectExceptionMessage('Temp Path is invalid or has not permission to writable.');
-        $params = JSignParamBuilder::instance()->withDefault()->setTempPath(null);
+        $params = JSignParamBuilder::instance()->withDefault()->setTempPath('');
         $this->service->sign($params);
     }