Enhancement: Show output when no tests could be detected with a duration exceeding the maximum duration

Author: localheinz

src/Reporter/DefaultReporter.php

@@ -43,10 +43,6 @@ public function __construct(
 
     public function report(SlowTestList $slowTestList): string
     {
-        if ($slowTestList->isEmpty()) {
-            return '';
-        }
-
         return \implode("\n", \iterator_to_array($this->lines($slowTestList)));
     }
 
@@ -57,6 +53,12 @@ private function lines(SlowTestList $slowTestList): \Generator
     {
         $slowTestCount = $slowTestList->count();
 
+        if ($slowTestCount->equals(Count::fromInt(0))) {
+            yield 'Could not detect any tests where the duration exceeded the maximum duration.';
+
+            return;
+        }
+
         if ($slowTestCount->equals(Count::fromInt(1))) {
             yield 'Detected 1 test where the duration exceeded the maximum duration.';
         } else {

test/Unit/Reporter/DefaultReporterTest.php

@@ -57,7 +57,7 @@ public function testReportReturnsEmptyStringWhenSlowTestListIsEmpty()
 
         $report = $reporter->report($slowTestList);
 
-        self::assertSame('', $report);
+        self::assertSame('Could not detect any tests where the duration exceeded the maximum duration.', $report);
     }
 
     /**