fix: extend Exception for ResolutionError and provide non-overlapping methods

Author: tcarrio

Diff for: features/bootstrap/FeatureContext.php

@@ -359,7 +359,7 @@ public function theReasonShouldIndicateAnErrorAndTheErrorCodeShouldIndicateAMiss
         $error = $details->getError();
 
         Assert::assertNotNull($error);
-        Assert::assertEquals($errorCode, $error->getCode());
+        Assert::assertEquals($errorCode, $error->getResolutionErrorCode());
     }
 
     /**
@@ -392,7 +392,7 @@ public function theReasonShouldIndicateAnErrorAndTheErrorCodeShouldIndicateAType
 
         Assert::assertNotNull($error);
         Assert::assertEquals(
-            $error->getCode(),
+            $error->getResolutionErrorCode(),
             ErrorCode::TYPE_MISMATCH(),
         );
     }

Diff for: src/implementation/provider/ResolutionError.php

@@ -4,27 +4,29 @@
 
 namespace OpenFeature\implementation\provider;
 
+use Exception;
 use OpenFeature\interfaces\provider\ErrorCode;
 use OpenFeature\interfaces\provider\ResolutionError as ResolutionErrorInterface;
 
-class ResolutionError implements ResolutionErrorInterface
+class ResolutionError extends Exception implements ResolutionErrorInterface
 {
-    private ErrorCode $code;
-    private ?string $message;
+    private ErrorCode $resolutionErrorCode;
+    private ?string $resolutionErrorMessage;
 
     public function __construct(ErrorCode $code, ?string $message = null)
     {
-        $this->code = $code;
-        $this->message = $message;
+        parent::__construct();
+        $this->resolutionErrorCode = $code;
+        $this->resolutionErrorMessage = $message;
     }
 
-    public function getCode(): ErrorCode
+    public function getResolutionErrorCode(): ErrorCode
     {
-        return $this->code;
+        return $this->resolutionErrorCode;
     }
 
-    public function getMessage(): ?string
+    public function getResolutionErrorMessage(): ?string
     {
-        return $this->message;
+        return $this->resolutionErrorMessage;
     }
 }

Diff for: src/interfaces/provider/ResolutionError.php

@@ -20,7 +20,7 @@ interface ResolutionError
      * In cases of abnormal execution, the provider MUST indicate an error using the idioms of the implementation
      * language, with an associated error code and optional associated error message.
      */
-    public function getCode(): ErrorCode;
+    public function getResolutionErrorCode(): ErrorCode;
 
     /**
      * ---------------
@@ -29,5 +29,5 @@ public function getCode(): ErrorCode;
      * In cases of abnormal execution, the provider MUST indicate an error using the idioms of the implementation
      * language, with an associated error code and optional associated error message.
      */
-    public function getMessage(): ?string;
+    public function getResolutionErrorMessage(): ?string;
 }

Diff for: tests/unit/OpenFeatureClientTest.php

@@ -498,7 +498,7 @@ public function testClientEvaluationDetailsAbnormalExecutionHasErrorCodeField():
         /** @var ResolutionError $resolutionError */
         $resolutionError = $actualDetails->getError();
         $this->assertNotNull($resolutionError);
-        $this->assertEquals($expectedErrorCode, $resolutionError->getCode());
+        $this->assertEquals($expectedErrorCode, $resolutionError->getResolutionErrorCode());
     }
 
     /**

Diff for: tests/unit/ProviderTest.php

@@ -247,7 +247,7 @@ public function testMustPopulateErrorFieldInAbnormalExecution(): void
         /** @var ResolutionError $resolutionError */
         $resolutionError = $actualResolution->getError();
         $this->assertNotNull($resolutionError);
-        $this->assertEquals($expectedErrorCode, $resolutionError->getCode());
+        $this->assertEquals($expectedErrorCode, $resolutionError->getResolutionErrorCode());
     }
 
     /**