Add tests to ensure the numeric value of iat, nbf and exp parameters

Author: joshuaruesweg

tests/JWTTest.php

@@ -394,4 +394,58 @@ public function testEncodeDecodeWithResource()
 
         $this->assertEquals('bar', $decoded->foo);
     }
+
+    public function testEncodeExpectsIntegerIat()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        $payload = [
+            'iat' => 'abc',
+        ];
+        JWT::encode($payload, 'my_key', 'HS256');
+    }
+
+    public function testDecodeExpectsIntegerIat()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        JWT::decode(
+            'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMzM3IiwibmFtZSI6IkpvaG4gU25vdyIsImlhdCI6InRlc3QifQ.B8cbURVQAPay3-Ep0DAm1Ji2rhij-hxfNA5PIDarf5o',
+            new Key('secret', 'HS256')
+        );
+    }
+
+    public function testEncodeExpectsIntegerNbf()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        $payload = [
+            'nbf' => 'abc',
+        ];
+        JWT::encode($payload, 'my_key', 'HS256');
+    }
+
+    public function testDecodeExpectsIntegerNbf()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        JWT::decode(
+            'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMzM3IiwibmFtZSI6IkpvaG4gU25vdyIsIm5iZiI6InRlc3QifQ.9KdFz3ktQoPO5QFG3E7J86PEuw5Vmx0VPrUKszP7DDs',
+            new Key('secret', 'HS256')
+        );
+    }
+
+    public function testEncodeExpectsIntegerExp()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        $payload = [
+            'exp' => 'abc',
+        ];
+        JWT::encode($payload, 'my_key', 'HS256');
+    }
+
+    public function testDecodeExpectsIntegerExp()
+    {
+        $this->expectException(UnexpectedValueException::class);
+        JWT::decode(
+            'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMzM3IiwibmFtZSI6IkpvaG4gU25vdyIsImV4cCI6InRlc3QifQ.LXevvGvchI3PTBZo9jZ5-4d0OvONVU-_8Tbg_22-PTo',
+            new Key('secret', 'HS256')
+        );
+    }
 }