Division By Zero Exception support

Updated the documentation.
Unit tests for strings.
DivisionByZeroException support.

4 files changed, 89 insertions, 1 deletions

diff --git a/src/NXP/Classes/Token/AbstractOperator.php b/src/NXP/Classes/Token/AbstractOperator.php
index 6cdfe99..87634d5 100644
--- a/src/NXP/Classes/Token/AbstractOperator.php
+++ b/src/NXP/Classes/Token/AbstractOperator.php
@@ -17,4 +17,34 @@ abstract class AbstractOperator implements InterfaceToken, InterfaceOperator
 {
     const RIGHT_ASSOC   = 'RIGHT';
     const LEFT_ASSOC    = 'LEFT';
+
+    /**
+     * Divide by zero reporting
+     *
+     * @var bool
+     */
+    private $divideByZeroReporting = false;
+
+    /**
+     * Set division by zero exception reporting
+     *
+     * @param bool $exception default true
+     *
+     * @return $this
+     */
+    public function setDivisionByZeroException($exception = true)
+    {
+        $this->divideByZeroReporting = $exception;
+        return $this;
+    }
+
+    /**
+     * Get division by zero exception status
+     *
+     * @return bool
+     */
+    public function getDivisionByZeroException()
+    {
+        return $this->divideByZeroReporting;
+    }
 }
diff --git a/src/NXP/Classes/Token/TokenDivision.php b/src/NXP/Classes/Token/TokenDivision.php
index 5bbc35e..9166d34 100644
--- a/src/NXP/Classes/Token/TokenDivision.php
+++ b/src/NXP/Classes/Token/TokenDivision.php
@@ -59,6 +59,10 @@ class TokenDivision extends AbstractOperator
             throw new IncorrectExpressionException("Division requires two operators");
         }
 
+        if ($this->getDivisionByZeroException() && $op2->getValue() == 0) {
+            throw new DivisionByZeroException();
+        }
+
         $result = $op2->getValue() != 0 ? $op1->getValue() / $op2->getValue() : 0;
 
         return new TokenNumber($result);
diff --git a/src/NXP/Classes/TokenFactory.php b/src/NXP/Classes/TokenFactory.php
index d70dd55..6956f31 100644
--- a/src/NXP/Classes/TokenFactory.php
+++ b/src/NXP/Classes/TokenFactory.php
@@ -35,6 +35,13 @@ class TokenFactory
     protected $operators = [];
 
     /**
+     * Divide by zero reporting
+     *
+     * @var bool
+     */
+    protected $divideByZeroReporting = false;
+
+    /**
      * Available functions
      *
      * @var array
@@ -91,6 +98,29 @@ class TokenFactory
     }
 
     /**
+     * Set division by zero exception reporting
+     *
+     * @param bool $exception default true
+     *
+     * @return TokenFactory
+     */
+    public function setDivisionByZeroException($exception = true)
+    {
+        $this->divideByZeroReporting = $exception;
+        return $this;
+    }
+
+    /**
+     * Get division by zero exception status
+     *
+     * @return bool
+     */
+    public function getDivisionByZeroException()
+    {
+        return $this->divideByZeroReporting;
+    }
+
+    /**
      * @return string
      */
     public function getTokenParserRegex()
@@ -143,7 +173,8 @@ class TokenFactory
         foreach ($this->operators as $operator) {
             $regex = sprintf('/%s/i', $operator::getRegex());
             if (preg_match($regex, $token)) {
-                return new $operator;
+                $op = new $operator;
+                return $op->setDivisionByZeroException($this->getDivisionByZeroException());
             }
         }
 
diff --git a/src/NXP/MathExecutor.php b/src/NXP/MathExecutor.php
index d62d07a..fbf6ab1 100644
--- a/src/NXP/MathExecutor.php
+++ b/src/NXP/MathExecutor.php
@@ -219,6 +219,29 @@ class MathExecutor
     }
 
     /**
+     * Set division by zero exception reporting
+     *
+     * @param bool $exception default true
+     *
+     * @return MathExecutor
+     */
+    public function setDivisionByZeroException($exception = true)
+    {
+        $this->tokenFactory->setDivisionByZeroException($exception);
+        return $this;
+    }
+
+    /**
+     * Get division by zero exception status
+     *
+     * @return bool
+     */
+    public function getDivisionByZeroException()
+    {
+        return $this->tokenFactory->getDivisionByZeroException();
+    }
+
+    /**
      * Execute expression
      *
      * @param $expression