Merge pull request #239 from magento-gl/3.11.0-RC

ACQE-4111 : Including Fatal error when running generate:tests --config parallel -g  in 3.11.0 Release

Author: jilu1

Diff for: CHANGELOG.md

@@ -12,6 +12,7 @@ Magento Functional Testing Framework Changelog
 
 * Fixed incorrect MFTF test dependencies path
 * Removed PHP 7.3 build check from MFTF PR build as PHP 7.3 is no longer supported
+* Fixed fatal error when running generate:tests --config parallel -g 
 
 
 3.10.3

Diff for: dev/tests/unit/Magento/FunctionalTestFramework/Util/Sorter/ParallelGroupSorterTest.php

@@ -378,6 +378,48 @@ public function testTestsAndSuitesSplitByMinGroupNumber(): void
         }
     }
 
+    /**
+     * Test splitting tests and suites when none of the suites has test.
+     * For example, this can happen when --filter option is used.
+     *
+     * @return void
+     * @throws FastFailException
+     */
+    public function testTestsAndSuitesSplitByGroupNumberSuiteNoTest(): void
+    {
+        // mock tests for test object handler.
+        $this->createMockForTest(0);
+
+        // create test to size array
+        $sampleTestArray = [
+            'test1' => 1,
+            'test2' => 125,
+            'test3' => 35
+        ];
+
+        // create mock suite references
+        $sampleSuiteArray = [
+            'mockSuite1' => [],
+            'mockSuite2' => [],
+        ];
+
+        // perform sort
+        $testSorter = new ParallelGroupSorter();
+        $actualResult = $testSorter->getTestsGroupedByFixedGroupCount($sampleSuiteArray, $sampleTestArray, 3);
+        // verify the resulting groups
+        $this->assertCount(3, $actualResult);
+
+        $expectedResults =  [
+            1 => ['test2'],
+            2 => ['test3'],
+            3 => ['test1']
+        ];
+
+        foreach ($actualResult as $groupNum => $group) {
+            $this->assertEquals($expectedResults[$groupNum], array_keys($group));
+        }
+    }
+
     /**
      * Test splitting tests and suites with invalid group number.
      *

Diff for: src/Magento/FunctionalTestingFramework/Util/Sorter/ParallelGroupSorter.php

@@ -128,6 +128,10 @@ public function getTestsGroupedByFixedGroupCount($suiteConfiguration, $testNameT
      */
     private function getSuiteGroupCounts($suiteNameToTestSize, $testNameToSize, $groupTotal)
     {
+        if (empty($suiteNameToTestSize)) {
+            return [];
+        }
+
         // Calculate the minimum possible group time
         $suiteNameToSize = $this->getSuiteToSize($suiteNameToTestSize);
         $minGroupTime = ceil((array_sum($testNameToSize) + array_sum($suiteNameToSize)) / $groupTotal);