Create bug-13857.php

Author: staabm

tests/PHPStan/Analyser/nsrt/bug-13857.php

@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Bug13857;
+
+use function PHPStan\Testing\assertType;
+
+/**
+ * @param array<int, array{state: string}> $array
+ */
+function test(array $array, int $id): void {
+	$array[$id]['state'] = 'foo';
+	// only one element was set to 'foo', not all of them.
+	assertType("non-empty-array<int, array{state: string}>", $array);
+}
+
+/**
+ * @param array<int, array{state?: string}> $array
+ */
+function testMaybe(array $array, int $id): void {
+	$array[$id]['state'] = 'foo';
+	// only one element was set to 'foo', not all of them.
+	assertType("non-empty-array<int, array{state?: string}>", $array);
+}
+
+/**
+ * @param array<int, array{state: string|bool}> $array
+ */
+function testUnionValue(array $array, int $id): void {
+	$array[$id]['state'] = 'foo';
+	// only one element was set to 'foo', not all of them.
+	assertType("non-empty-array<int, array{state: bool|string}>", $array);
+}
+
+/**
+ * @param array<int, array{state: string}|array{foo: int}> $array
+ */
+function testUnionArray(array $array, int $id): void {
+	$array[$id]['state'] = 'foo';
+	// only one element was set to 'foo', not all of them.
+	assertType("non-empty-array<int, non-empty-array{foo?: int, state?: string}>", $array);
+}
+
+/**
+ * @param array<int, array{state: string}|array{foo: int}> $array
+ */
+function testUnionArrayDifferentType(array $array, int $id): void {
+	$array[$id]['state'] = true;
+	assertType("non-empty-array<int, array{state: string}|non-empty-array{foo?: int, state?: true}>", $array);
+}
+
+/**
+ * @param array<int, array{state: 'foo'}> $array
+ */
+function testConstantArray(array $array, int $id): void {
+	$array[$id]['state'] = 'bar';
+	assertType("non-empty-array<int, array{state: 'bar'}|array{state: 'foo'}>", $array);
+}
+
+/**
+ * @param array<int, array{state: 'foo'}> $array
+ */
+function testConstantArrayNonScalarAssign(array $array, int $id, bool $b): void {
+	$array[$id]['state'] = $b;
+	assertType("non-empty-array<int, array{state: 'foo'}|array{state: bool}>", $array);
+}