Throw an IncorrectNumberOfFunctionParametersException if a function gets more arguments than it supports (#117)

* Throw an IncorrectNumberOfFunctionParametersException if a function gets more arguments than it supports

* Update CustomFunction.php

Code Style

Co-authored-by: Bruce Wells <brucekwells@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/MathTest.php b/tests/MathTest.php
index 94a14d4..59ce207 100644
--- a/tests/MathTest.php
+++ b/tests/MathTest.php
@@ -674,6 +674,16 @@ class MathTest extends TestCase
         $calculator->execute('myfunc(1)');
     }
 
+    public function testFunctionIncorrectNumberOfParametersTooMany() : void
+    {
+        $calculator = new MathExecutor();
+        $this->expectException(IncorrectNumberOfFunctionParametersException::class);
+        $calculator->addFunction('myfunc', static function($arg1, $arg2) {
+            return $arg1 + $arg2;
+        });
+        $calculator->execute('myfunc(1,2,3)');
+    }
+
     public function testFunctionIf() : void
     {
         $calculator = new MathExecutor();