add test with mandatory group

Author: staabm

tests/PHPStan/Analyser/nsrt/preg_match_shapes.php

@@ -93,9 +93,10 @@ function doNonCapturingGroup(string $s): void {
 
 function doNamedSubpattern(string $s): void {
 	if (preg_match('/\w-(?P<num>\d+)-(\w)/', $s, $matches)) {
-		assertType('array{0: string, num: string, 1: string, 2: string}', $matches);
+		// could be assertType('array{0: string, num: string, 1: string, 2: string, 3: string}', $matches);
+		assertType('array<string>', $matches);
 	}
-	assertType('array{}|array{0: string, num: string, 1: string, 2: string}', $matches);
+	assertType('array<string>', $matches);
 
 	if (preg_match('/^(?<name>\S+::\S+)/', $s, $matches)) {
 		assertType('array{0: string, name: string, 1: string}', $matches);
@@ -364,22 +365,12 @@ function bug11291(string $s): void {
 	assertType('array{}|array{0: string, 1: string, 2?: string, 3?: string}', $matches);
 }
 
-function bug11323a(string $s): void
-{
-	if (preg_match('/Price: (?P<currency>£|€)\d+/', $s, $matches)) {
+function unmatchedAsNullWithMandatoryGroup(string $s): void {
+	if (preg_match('/Price: (?<currency>£|€)\d+/', $s, $matches, PREG_UNMATCHED_AS_NULL)) {
 		assertType('array{0: string, currency: string, 1: string}', $matches);
 	} else {
 		assertType('array{}', $matches);
 	}
 	assertType('array{}|array{0: string, currency: string, 1: string}', $matches);
 }
 
-function bug11323b(string $s): void
-{
-	if (preg_match('/Price: (?<currency>£|€)\d+/', $s, $matches)) {
-		assertType('array{0: string, currency: string, 1: string}', $matches);
-	} else {
-		assertType('array{}', $matches);
-	}
-	assertType('array{}|array{0: string, currency: string, 1: string}', $matches);
-}