Merge pull request #20 from codacy/safe-division

Fix #18: Prevent division by zero exception

src/Codacy/Coverage/Parser/CloverParser.php

@@ -25,7 +25,7 @@ public function makeReport()
         $projectMetrics = $project->metrics;
         $coveredStatements = intval($projectMetrics['coveredstatements']);
         $statementsTotal = intval($projectMetrics['statements']);
-        $reportTotal = round(($coveredStatements / $statementsTotal) * 100);
+        $reportTotal = round($this->safeDivision($coveredStatements, $statementsTotal) * 100);
         $fileReports = $this->makeFileReports($project);
         $report = new CoverageReport($reportTotal, $fileReports);
         return $report;
@@ -71,7 +71,7 @@ private function makeFileReportsFromFiles(\SimpleXMLElement $node, $fileReports)
             if ($countStatement == 0) {
                 $fileTotal = 0;
             } else {
-                $fileTotal = round(($countCoveredStatements / $countStatement) * 100);
+                $fileTotal = round($this->safeDivision($countCoveredStatements, $countStatement) * 100);
             }
             $fileName = $this->getRelativePath($file['name']);
             $lineCoverage = $this->getLineCoverage($file);
@@ -135,4 +135,12 @@ private function getRelativePath(\SimpleXMLElement $fileName)
 
         return $str;
     }
+
+    private function safeDivision($a, $b)
+    {
+        if ($b === 0) {
+            return 0;
+        }
+        return $a / $b;
+    }
 }