teamcity: add missing test count output

src/Logging/TeamCity/Converter.php

@@ -166,6 +166,14 @@ final class Converter
         return $this->toRelativePath($path);
     }
 
+    /**
+     * Gets the test suite size.
+     */
+    public function getTestSuiteSize(TestSuite $testSuite): int
+    {
+        return $testSuite->count();
+    }
+
     /**
      * Transforms the given path in relative path.
      */

src/Logging/TeamCity/ServiceMessage.php

@@ -40,6 +40,13 @@ final class ServiceMessage
         ]);
     }
 
+    public static function testSuiteCount(int $count): self
+    {
+        return new self('testCount', [
+            'count' => $count,
+        ]);
+    }
+
     public static function testSuiteFinished(string $name): self
     {
         return new self('testSuiteFinished', [

src/Logging/TeamCity/TeamCityLogger.php

@@ -44,6 +44,8 @@ final class TeamCityLogger
 {
     private ?HRTime $time = null;
 
+    private bool $isSummaryTestCountPrinted = false;
+
     /**
      * @throws EventFacadeIsSealedException
      * @throws UnknownSubscriberTypeException
@@ -66,6 +68,15 @@ final class TeamCityLogger
         );
 
         $this->output($message);
+
+        if (! $this->isSummaryTestCountPrinted) {
+            $this->isSummaryTestCountPrinted = true;
+            $message = ServiceMessage::testSuiteCount(
+                $this->converter->getTestSuiteSize($event->testSuite())
+            );
+
+            $this->output($message);
+        }
     }
 
     public function testSuiteFinished(TestSuiteFinished $event): void