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475 lines
15 KiB
PHP
475 lines
15 KiB
PHP
<?php
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namespace Psalm\Tests;
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use Psalm\Tests\Traits\InvalidCodeAnalysisTestTrait;
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use Psalm\Tests\Traits\ValidCodeAnalysisTestTrait;
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use const DIRECTORY_SEPARATOR;
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class ReferenceTest extends TestCase
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{
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use InvalidCodeAnalysisTestTrait;
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use ValidCodeAnalysisTestTrait;
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public function providerValidCodeParse(): iterable
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{
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return [
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'referenceAssignmentToNonReferenceCountsAsUse' => [
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'code' => '<?php
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$b = &$a;
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$b = 2;
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echo $a;
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',
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'assertions' => [
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'$b===' => '2',
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'$a===' => '2',
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],
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],
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'updateReferencedTypes' => [
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'code' => '<?php
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$a = 1;
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$b = &$a;
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$b = 2;
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$c = 3;
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$b = &$c;
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$b = 4;
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',
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'assertions' => [
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'$a===' => '2',
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'$b===' => '4',
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'$c===' => '4',
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],
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],
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'changingReferencedVariableChangesReference' => [
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'code' => '<?php
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$a = 1;
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$b = &$a;
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$a = 2;
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',
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'assertions' => [
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'$a===' => '2',
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'$b===' => '2',
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],
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],
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'unsetReference' => [
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'code' => '<?php
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$a = 1;
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$b = &$a;
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$b = 2;
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unset($b);
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$b = 3;
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',
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'assertions' => [
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'$a===' => '2',
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'$b===' => '3',
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],
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],
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'recursiveReference' => [
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'code' => '<?php
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$a = 1;
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$b = &$a;
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$a = &$b;
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$b = 2;
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',
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'assertions' => [
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'$a===' => '2',
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'$b===' => '2',
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],
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],
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'SKIPPED-referenceToArrayItemChangesArrayType' => [
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'code' => '<?php
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/** @var list<int> */
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$arr = [];
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assert(isset($arr[0]));
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$int = &$arr[0];
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$int = (string) $int;
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',
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'assertions' => [
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'$arr' => 'list<int|string>',
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],
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],
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'referenceToReference' => [
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'code' => '<?php
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$a = 1;
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$b = &$a;
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$c = &$b;
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$c = 2;
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$d = 3;
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$b = &$d;
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',
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'assertions' => [
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'$a===' => '2',
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'$b===' => '3',
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'$c===' => '2',
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'$d===' => '3',
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],
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],
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'referenceToSubsequentCatch' => [
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'code' => '<?php
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$a = null;
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$b = &$a;
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try {
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throw new \Exception();
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} catch (\Exception $a) {
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takesException($b);
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}
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function takesException(\Exception $e): void {}
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',
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],
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'referenceAsSubsequentCatch' => [
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'code' => '<?php
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$a = null;
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$b = &$a;
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try {
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throw new \Exception();
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} catch (\Exception $b) {
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takesException($a);
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}
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function takesException(\Exception $e): void {}
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',
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],
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'referenceToNewVariableInitializesNull' => [
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'code' => '<?php
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$b = &$a;
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',
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'assertions' => [
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'$a===' => 'null',
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'$b===' => 'null',
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],
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],
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'referenceShadowedByGlobal' => [
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'code' => '<?php
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/** @var string */
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$a = 0;
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function foo(): void
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{
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$b = 1;
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$a = &$b;
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global $a;
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takesString($a);
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}
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function takesString(string $str): void {}
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',
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],
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'unsetPreventsReferenceConfusion' => [
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'code' => '<?php
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$arr = [1, 2, 3];
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foreach ($arr as &$i) {
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++$i;
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}
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unset($i);
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for ($i = 0; $i < 10; ++$i) {
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echo $i;
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}
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',
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],
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'assignmentAsReferencePreventsReferenceConfusion' => [
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'code' => '<?php
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$arr = [1, 2, 3];
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foreach ($arr as &$i) {
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++$i;
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}
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$i = &$foo;
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for ($i = 0; $i < 10; ++$i) {
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echo $i;
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}
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',
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],
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'assignmentAsReferenceInForeachPreventsReferenceConfusion' => [
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'code' => '<?php
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$arr = [1, 2, 3];
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foreach ($arr as &$i) {
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++$i;
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}
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foreach ($arr as &$i) {
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++$i;
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}
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',
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],
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'referenceToProperty' => [
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'code' => '<?php
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class Foo
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{
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public string $bar = "";
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}
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$foo = new Foo();
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$bar = &$foo->bar;
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$foo->bar = "bar";
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',
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'assertions' => [
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'$bar===' => "'bar'",
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],
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'ignored_issues' => ['UnsupportedPropertyReferenceUsage'],
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],
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'referenceReassignedInLoop' => [
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'code' => '<?php
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/** @psalm-param list<string> $keys */
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function &ensure_array(array &$what, array $keys): array
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{
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$arr = & $what;
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while ($key = array_shift($keys)) {
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if (!isset($arr[$key]) || !is_array($arr[$key])) {
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$arr[$key] = array();
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}
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$arr = & $arr[$key];
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}
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return $arr;
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}
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',
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],
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'dontCrashOnReferenceToMixedVariableArrayOffset' => [
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'code' => '<?php
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function func(&$a): void
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{
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$_ = &$a["f"];
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}
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',
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'assertions' => [],
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'ignored_issues' => ['MixedArrayAccess', 'MissingParamType'],
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],
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'dontCrashOnReferenceToArrayUnknownOffset' => [
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'code' => '<?php
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function func(array &$a): void
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{
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$_ = &$a["f"];
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}
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',
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'assertions' => [],
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],
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'dontCrashOnReferenceToArrayMixedOffset' => [
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'code' => '<?php
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/** @param array{f: mixed} $a */
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function func(array &$a): void
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{
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$_ = &$a["f"];
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}
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',
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'assertions' => [],
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],
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'allowDocblockTypingOtherVariable' => [
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'code' => '<?php
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$a = 1;
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/** @var string $a */
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$b = &$a;
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',
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'assertions' => [
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'$b' => 'string',
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],
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],
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'referenceToArrayVariableOffsetDoesntCrashWhenOffsetVariableChangesDueToReconciliation' => [
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'code' => '<?php
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$a = "a";
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$b = false;
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$doesNotMatter = ["a" => ["id" => 1]];
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$reference = &$doesNotMatter[$a];
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/** @psalm-suppress TypeDoesNotContainType */
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$result = ($a === "not-a" && ($b || false));
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',
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'assertions' => [
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'$reference===' => 'array{id: 1}',
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],
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],
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'multipleReferencesToArrayVariableOffsetThatChangesDueToReconciliation' => [
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'code' => '<?php
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$a = "a";
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$b = false;
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$doesNotMatter = ["a" => ["id" => 1]];
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$reference1 = &$doesNotMatter[$a];
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$reference2 = &$doesNotMatter[$a];
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/** @psalm-suppress TypeDoesNotContainType */
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$result = ($a === "not-a" && ($b || false));
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$reference1["id"] = 2;
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',
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'assertions' => [
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'$reference1===' => 'array{id: 2}',
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'$reference2===' => 'array{id: 2}',
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],
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],
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];
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}
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public function providerInvalidCodeParse(): iterable
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{
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return [
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'referenceReuseForeachValue' => [
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'code' => '<?php
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/** @var array<int> */
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$arr = [];
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foreach ($arr as &$var) {
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeclaredInForeach' => [
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'code' => '<?php
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/** @var array<int> */
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$arr = [];
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foreach ($arr as $val) {
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$var = &$val;
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeclaredInFor' => [
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'code' => '<?php
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/** @var list<int> */
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$arr = [];
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for ($i = 0; $i < count($arr); ++$i) {
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$var = &$arr[$i];
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeclaredInIf' => [
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'code' => '<?php
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/** @var array<int> */
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$arr = [];
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if (isset($arr[0])) {
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$var = &$arr[0];
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeclaredInElseif' => [
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'code' => '<?php
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/** @var array<int> */
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$arr = [];
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if (random_int(0, 1)) {
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} elseif (isset($arr[0])) {
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$var = &$arr[0];
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeclaredInElse' => [
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'code' => '<?php
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/** @var array<int> */
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$arr = [];
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if (!isset($arr[0])) {
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} else {
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$var = &$arr[0];
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$var += 1;
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referenceReuseDeeplyNested' => [
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'code' => '<?php
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/** @var list<list<list<int>>> */
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$arr = [];
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for ($i = 0; $i < count($arr); ++$i) {
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foreach ($arr[$i] as $inner_arr) {
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if (isset($inner_arr[0])) {
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$var = &$inner_arr[0];
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$var += 1;
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}
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}
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}
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$var = "foo";
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'referencesIgnoreVarAnnotation' => [
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'code' => '<?php
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$a = 1;
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/** @var int */
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$b = &$a;
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',
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'error_message' => 'InvalidDocblock - src' . DIRECTORY_SEPARATOR . 'somefile.php:4:21 - Docblock type cannot be used for reference assignment',
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],
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'unsetOnlyPreventsReferenceConfusionAfterCall' => [
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'code' => '<?php
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$arr = [1, 2, 3];
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foreach ($arr as &$i) {
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++$i;
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}
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for ($i = 0; $i < 10; ++$i) {
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echo $i;
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}
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unset($i);
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'assignmentAsReferenceOnlyPreventsReferenceConfusionAfterAssignment' => [
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'code' => '<?php
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$arr = [1, 2, 3];
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foreach ($arr as &$i) {
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++$i;
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}
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for ($i = 0; $i < 10; ++$i) {
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echo $i;
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}
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$i = &$foo;
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',
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'error_message' => 'ReferenceReusedFromConfusingScope',
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],
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'unsupportedReferenceUsageWithReferenceToArrayOffsetOfArrayOffset' => [
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'code' => '<?php
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/** @var array<string, string> */
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$arr = [];
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/** @var non-empty-list<string> */
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$foo = ["foo"];
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$bar = &$arr[$foo[0]];
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',
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'error_message' => 'UnsupportedReferenceUsage',
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],
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'unsupportedReferenceUsageContinuesAnalysis' => [
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'code' => '<?php
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/** @var array<string, string> */
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$arr = [];
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/** @var non-empty-list<string> */
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$foo = ["foo"];
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/** @psalm-suppress UnsupportedReferenceUsage */
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$bar = &$arr[$foo[0]];
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/** @psalm-trace $bar */;
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',
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'error_message' => ' - $bar: string',
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],
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];
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}
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}
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