Fixed build

Author: ondrejmirtes

tests/PHPStan/Rules/Variables/VariableCertaintyNullCoalesceRuleTest.php

@@ -28,17 +28,27 @@ public function testVariableCertaintyInNullCoalesce(): void
 				'Variable $a on left side of ?? is always null.',
 				13,
 			],
+		]);
+	}
+
+	public function testVariableCertaintyInNullCoalesceAssign(): void
+	{
+		if (PHP_VERSION_ID < 70400) {
+			$this->markTestSkipped('Test requires PHP 7.4.');
+		}
+
+		$this->analyse([__DIR__ . '/data/variable-certainty-null-assign.php'], [
 			[
 				'Variable $scalar on left side of ??= always exists and is not nullable.',
-				20,
+				6,
 			],
 			[
 				'Variable $doesNotExist on left side of ??= is never defined.',
-				22,
+				8,
 			],
 			[
 				'Variable $a on left side of ??= is always null.',
-				27,
+				13,
 			],
 		]);
 	}

tests/PHPStan/Rules/Variables/data/variable-certainty-null-assign.php

@@ -0,0 +1,15 @@
+<?php
+
+function (): void {
+	$scalar = 3;
+
+	echo $scalar ??= 4;
+
+	echo $doesNotExist ??= 0;
+};
+
+function (?string $a): void {
+	if (!is_string($a)) {
+		echo $a ??= 'foo';
+	}
+};

tests/PHPStan/Rules/Variables/data/variable-certainty-null.php

@@ -14,16 +14,3 @@ function (?string $a): void {
 	}
 };
 
-function (): void {
-	$scalar = 3;
-
-	echo $scalar ??= 4;
-
-	echo $doesNotExist ??= 0;
-};
-
-function (?string $a): void {
-	if (!is_string($a)) {
-		echo $a ??= 'foo';
-	}
-};