From a702e2e6155e9bb49e64eb728c5056aff5251fa9 Mon Sep 17 00:00:00 2001
From: Markus Staab <m.staab@complex-it.de>
Date: Wed, 27 Apr 2022 22:47:28 +0200
Subject: [PATCH] Support non-empty-array in
 InArrayFunctionTypeSpecifyingExtension

---
 ...InArrayFunctionTypeSpecifyingExtension.php | 17 +++++++++++++++-
 .../Analyser/NodeScopeResolverTest.php        |  1 +
 .../Analyser/data/in-array-non-empty.php      | 20 +++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 tests/PHPStan/Analyser/data/in-array-non-empty.php

diff --git a/src/Type/Php/InArrayFunctionTypeSpecifyingExtension.php b/src/Type/Php/InArrayFunctionTypeSpecifyingExtension.php
index 65b38f234c..d0882cf6ce 100644
--- a/src/Type/Php/InArrayFunctionTypeSpecifyingExtension.php
+++ b/src/Type/Php/InArrayFunctionTypeSpecifyingExtension.php
@@ -9,6 +9,7 @@
 use PHPStan\Analyser\TypeSpecifierAwareExtension;
 use PHPStan\Analyser\TypeSpecifierContext;
 use PHPStan\Reflection\FunctionReflection;
+use PHPStan\Type\Accessory\NonEmptyArrayType;
 use PHPStan\Type\ArrayType;
 use PHPStan\Type\Constant\ConstantBooleanType;
 use PHPStan\Type\FunctionTypeSpecifyingExtension;
@@ -45,7 +46,8 @@ public function specifyTypes(FunctionReflection $functionReflection, FuncCall $n
 		}
 
 		$needleType = $scope->getType($node->getArgs()[0]->value);
-		$arrayValueType = $scope->getType($node->getArgs()[1]->value)->getIterableValueType();
+		$arrayType = $scope->getType($node->getArgs()[1]->value);
+		$arrayValueType = $arrayType->getIterableValueType();
 
 		if (
 			$context->truthy()
@@ -83,6 +85,19 @@ public function specifyTypes(FunctionReflection $functionReflection, FuncCall $n
 			));
 		}
 
+		if (
+			$context->truthy()
+			&& $arrayType->isArray()->yes()
+		) {
+			$specifiedTypes = $specifiedTypes->unionWith($this->typeSpecifier->create(
+				$node->getArgs()[1]->value,
+				TypeCombinator::intersect($arrayType, new NonEmptyArrayType()),
+				$context,
+				false,
+				$scope,
+			));
+		}
+
 		return $specifiedTypes;
 	}
 
diff --git a/tests/PHPStan/Analyser/NodeScopeResolverTest.php b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
index ae77180c18..5094afa198 100644
--- a/tests/PHPStan/Analyser/NodeScopeResolverTest.php
+++ b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
@@ -914,6 +914,7 @@ public function dataFileAsserts(): iterable
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-7031.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/constant-array-intersect.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-7153.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/in-array-non-empty.php');
 	}
 
 	/**
diff --git a/tests/PHPStan/Analyser/data/in-array-non-empty.php b/tests/PHPStan/Analyser/data/in-array-non-empty.php
new file mode 100644
index 0000000000..abedc54538
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/in-array-non-empty.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace InArrayNonEmpty;
+
+use function PHPStan\Testing\assertType;
+
+class HelloWorld
+{
+	/**
+	 * @phpstan-param list<string> $array
+	 */
+	public function sayHello(array $array): void
+	{
+		if(in_array("thing", $array, true)){
+			assertType('non-empty-array<int, string>', $array);
+		}
+	}
+}