add tests

Author: devnexen

ext/gmp/tests/gmp_pow_fpe.phpt

@@ -14,9 +14,20 @@ try {
 try {
 	gmp_pow(256, PHP_INT_MAX);
 } catch (\ValueError $e) {
-	echo $e->getMessage();
+	echo $e->getMessage() . PHP_EOL;
 }
+
+var_dump(gmp_pow(gmp_add(gmp_mul(gmp_init(PHP_INT_MAX), gmp_init(PHP_INT_MAX)), 3), 256));
+var_dump(gmp_pow(gmp_init(PHP_INT_MAX), 256));
 ?>
---EXPECT--
+--EXPECTF--
 base and exponent overflow
 base and exponent overflow
+object(GMP)#%d (1) {
+  ["num"]=>
+  string(%d) "%s"
+}
+object(GMP)#%d (1) {
+  ["num"]=>
+  string(%d) "%s"
+}