Refine deviation calculations to include percentage formatting, adjust precision, and update related tests.

Author: andrey-helldar

src/Services/DeviationService.php

@@ -60,10 +60,12 @@ protected function deviationMetric(array $item): DeviationData
         $time   = $this->result->values($item['avg'], 0, false);
         $memory = $this->result->values($item['avg'], 1, false);
 
+        $avg = $this->metric($item, 'avg');
+
         return new DeviationData(
             percent: $this->metricData(
-                $this->deviation($time),
-                $this->deviation($memory),
+                $this->percentage($avg->time, $this->deviation($time)),
+                $this->percentage($avg->memory, $this->deviation($memory)),
             ),
         );
     }
@@ -99,4 +101,17 @@ protected function deviation(array $values): float
 
         return sqrt(array_sum($values) / count($values));
     }
+
+    protected function percentage(float $value1, float $value2): float
+    {
+        if (! $value1 && ! $value2) {
+            return 0;
+        }
+
+        if ($value1 === 0.0) {
+            return INF;
+        }
+
+        return ($value2 / $value1) * 100;
+    }
 }

src/Transformers/ResultTransformer.php

@@ -102,9 +102,9 @@ protected function value(MetricData $metric): string
 
     protected function deviation(float $value): string
     {
-        $value = round($value, 6);
+        $value = round($value, 2);
 
-        return ($value > 0 ? '+' : '') . $value;
+        return ($value > 0 ? '+' : '') . $value . '%';
     }
 
     protected function time(float $value): float

tests/.pest/snapshots/Unit/Result/ToConsoleTest/deviations.snap

@@ -12,6 +12,6 @@
 +------------------+-------------------------------+------------------------------+
 | order            | 2                             | 1                            |
 +------------------+-------------------------------+------------------------------+
-| deviation time   | 0                             | 0                            |
-| deviation memory | 0                             | 0                            |
+| deviation time   | 0%                            | 0%                           |
+| deviation memory | 0%                            | 0%                           |
 +------------------+-------------------------------+------------------------------+