- Fixed endless loop on string keys for datasets with average dataset

- Added average dataset tests to test suite
- Updated testfile because of SVG driver modifications

1 files changed, 5 insertions, 0 deletions

diff --git a/src/datasets/average.php b/src/datasets/average.php
index d76b7f8..ade2e49 100644
--- a/src/datasets/average.php
+++ b/src/datasets/average.php
@@ -240,6 +240,11 @@ class ezcGraphDataSetAveragePolynom extends ezcGraphDataSet
      */
     final public function next()
     {
+        if ( $this->min === $this->max )
+        {
+            throw new ezcGraphDatasetAverageInvalidKeysException();
+        }
+
         if ( ++$this->position >= $this->resolution )
         {
             return false;