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psalm/tests/TypeReconciliation/IssetTest.php
2024-01-15 10:11:22 +01:00

1222 lines
44 KiB
PHP

<?php
namespace Psalm\Tests\TypeReconciliation;
use Psalm\Tests\TestCase;
use Psalm\Tests\Traits\InvalidCodeAnalysisTestTrait;
use Psalm\Tests\Traits\ValidCodeAnalysisTestTrait;
class IssetTest extends TestCase
{
use ValidCodeAnalysisTestTrait;
use InvalidCodeAnalysisTestTrait;
public function providerValidCodeParse(): iterable
{
return [
'issetWithSimpleAssignment' => [
'code' => '<?php
$array = [];
if (isset($array[$a = 5])) {
print "hello";
}
print $a;',
'assertions' => [],
'ignored_issues' => ['EmptyArrayAccess'],
],
'issetWithMultipleAssignments' => [
'code' => '<?php
if (rand(0, 4) > 2) {
$arr = [5 => [3 => "hello"]];
}
if (isset($arr[$a = 5][$b = 3])) {
}
echo $a;
echo $b;',
'assertions' => [],
'ignored_issues' => ['MixedArrayAccess'],
],
'issetWithArrayAssignment' => [
'code'=> '<?php
/**
* @param array{0?: 0} $arr
* @param 0 $i
* @return array{0: 0|1}
*/
function t2(array $arr, int $i): array {
if (!isset($arr[$i])) {
$arr[$i] = 1;
}
return $arr;
}',
],
'issetWithArrayAssignment2' => [
'code'=> '<?php
/**
* @param array{0?: 0, 1?: 0} $arr
* @param 0|1 $i
* @return array{0?: 0|1, 1?: 0|1}
*/
function t2(array $arr, int $i): array {
if (!isset($arr[$i])) {
$arr[$i] = 1;
}
return $arr;
}',
],
'issetWithArrayAssignmentSubVar' => [
'code'=> '<?php
/**
* @param array{0?: 0, v: 0} $arr
* @return array{0: 0|1, v: 0}
*/
function t2(array $arr): array {
if (!isset($arr[$arr["v"]])) {
$arr[$arr["v"]] = 1;
}
return $arr;
}',
],
'isset' => [
'code' => '<?php
$a = isset($b) ? $b : null;',
'assertions' => [
'$a' => 'mixed|null',
],
'ignored_issues' => ['MixedAssignment'],
],
'nullCoalesce' => [
'code' => '<?php
$a = $b ?? null;',
'assertions' => [
'$a' => 'mixed|null',
],
'ignored_issues' => ['MixedAssignment'],
],
'nullCoalesceWithGoodVariable' => [
'code' => '<?php
$b = rand(0, 10) > 5 ? "hello" : null;
$a = $b ?? null;',
'assertions' => [
'$a' => 'null|string',
],
],
'issetKeyedOffset' => [
'code' => '<?php
function getArray() : array {
return [];
}
$foo = getArray();
if (!isset($foo["a"])) {
$foo["a"] = "hello";
}',
'assertions' => [
'$foo[\'a\']' => 'mixed|string',
],
'ignored_issues' => [],
],
'issetKeyedOffsetORFalse' => [
'code' => '<?php
/** @return void */
function takesString(string $str) {}
$bar = rand(0, 1) ? ["foo" => "bar"] : false;
if (isset($bar["foo"])) {
takesString($bar["foo"]);
}',
'assertions' => [],
'ignored_issues' => ['PossiblyInvalidArrayAccess'],
],
'nullCoalesceKeyedOffset' => [
'code' => '<?php
function getArray() : array {
return [];
}
$foo = getArray();
$foo["a"] = $foo["a"] ?? "hello";',
'assertions' => [
'$foo[\'a\']' => 'mixed|string',
],
'ignored_issues' => ['MixedAssignment'],
],
'noRedundantConditionOnMixed' => [
'code' => '<?php
function testarray(array $data): void {
foreach ($data as $item) {
if (isset($item["a"]) && isset($item["b"]["c"])) {
echo "Found\n";
}
}
}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment', 'MixedArrayAccess'],
],
'testUnset' => [
'code' => '<?php
$foo = ["a", "b", "c"];
foreach ($foo as $bar) {}
unset($foo, $bar);
function foo(): void {
$foo = ["a", "b", "c"];
foreach ($foo as $bar) {}
unset($foo, $bar);
}',
],
'issetTKeyedArray' => [
'code' => '<?php
$arr = [
"profile" => [
"foo" => "bar",
],
"groups" => [
"foo" => "bar",
"hide" => rand() % 2 > 0,
],
];
foreach ($arr as $item) {
if (!isset($item["hide"]) || !$item["hide"]) {}
}',
],
'issetPropertyAffirmsObject' => [
'code' => '<?php
class A {
/** @var ?int */
public $id;
}
function takesA(?A $a): A {
if (isset($a->id)) {
return $a;
}
return new A();
}',
],
'issetVariableKeysWithoutChange' => [
'code' => '<?php
$arr = [[1, 2, 3], null, [1, 2, 3], null];
$b = rand(0, 2);
$c = rand(0, 2);
if (isset($arr[$b][$c])) {
echo $arr[$b][$c];
}',
],
'issetNonNullArrayKey' => [
'code' => '<?php
/**
* @param array<int, int> $arr
*/
function foo(array $arr) : int {
$b = rand(0, 3);
if (!isset($arr[$b])) {
throw new \Exception("bad");
}
return $arr[$b];
}',
],
'issetWithCalculatedKeyAndEqualComparison' => [
'code' => '<?php
/** @var array<string, string> $array */
$array = [];
function sameString(string $string): string {
return $string;
}
if (isset($array[sameString("key")]) === false) {
throw new \LogicException("No such key");
}
$value = $array[sameString("key")];
',
'assertions' => [
'$value' => 'string',
],
],
'issetArrayOffsetConditionalCreationWithInt' => [
'code' => '<?php
/** @param array<int, string> $arr */
function foo(array $arr) : string {
if (!isset($arr[0])) {
$arr[0] = "hello";
}
return $arr[0];
}',
],
'issetArrayOffsetConditionalCreationWithVariable' => [
'code' => '<?php
/** @param array<int, string> $arr */
function foo(array $arr) : string {
$b = 5;
if (!isset($arr[$b])) {
$arr[$b] = "hello";
}
return $arr[$b];
}',
],
'noExceptionOnBracketString' => [
'code' => '<?php
if (isset($foo["bar[]"])) {}',
],
'issetArrayOffsetAndProperty' => [
'code' => '<?php
class A {
/** @var ?B */
public $b;
}
class B {}
/**
* @param A[] $arr
*/
function takesAList(array $arr) : B {
if (isset($arr[1]->b)) {
return $arr[1]->b;
}
throw new \Exception("bad");
}',
],
'allowUnknownAdditionToInt' => [
'code' => '<?php
$arr = [1, 1, 1, 1, 2, 5, 3, 2];
$cumulative = [];
foreach ($arr as $val) {
if (isset($cumulative[$val])) {
$cumulative[$val] = $cumulative[$val] + 1;
} else {
$cumulative[$val] = 1;
}
}',
],
'allowUnknownArrayMergeToInt' => [
'code' => '<?php
$arr = [1, 1, 1, 1, 2, 5, 3, 2];
$cumulative = [];
foreach ($arr as $val) {
if (isset($cumulative[$val])) {
$cumulative[$val] = array_merge($cumulative[$val], [$val]);
} else {
$cumulative[$val] = [$val];
}
}
foreach ($cumulative as $arr) {
foreach ($arr as $val) {
takesInt($val);
}
}
function takesInt(int $i) : void {}',
],
'returnArrayWithDefinedKeys' => [
'code' => '<?php
/**
* @param array{bar?: int, foo: int|string} $arr
* @return array{bar: int, foo: string}|null
*/
function foo(array $arr) : ?array {
if (!isset($arr["bar"])) {
return null;
}
if (is_int($arr["foo"])) {
return null;
}
return $arr;
}',
],
'arrayAccessAfterOneIsset' => [
'code' => '<?php
$arr = [];
foreach ([1, 2, 3] as $foo) {
if (!isset($arr["bar"])) {
$arr["bar"] = 0;
}
echo $arr["bar"];
}',
],
'arrayAccessAfterTwoIssets' => [
'code' => '<?php
$arr = [];
foreach ([1, 2, 3] as $foo) {
if (!isset($arr["foo"])) {
$arr["foo"] = 0;
}
if (!isset($arr["bar"])) {
$arr["bar"] = 0;
}
echo $arr["bar"];
}',
],
'issetAdditionalVar' => [
'code' => '<?php
class Example {
const FOO = "foo";
/**
* @param array{bar:string, ...} $params
*/
public function test(array $params) : bool {
if (isset($params[self::FOO])) {
return true;
}
if (isset($params["bat"])) {
return true;
}
return false;
}
}',
],
'noRedundantConditionAfterIsset' => [
'code' => '<?php
/** @param array<string, array<int, string>> $arr */
function foo(array $arr, string $k) : void {
if (!isset($arr[$k])) {
return;
}
if ($arr[$k][0]) {}
}',
],
'mixedArrayIsset' => [
'code' => '<?php
$a = isset($_GET["a"]) ? $_GET["a"] : "";
if ($a) {}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment', 'MixedArrayAccess', 'RiskyTruthyFalsyComparison'],
],
'mixedArrayIssetGetStringVar' => [
'code' => '<?php
if (isset($_GET["b"]) && is_string($_GET["b"])) {
echo $_GET["b"];
}',
],
'regularArrayAccessInLoopAfterIsset' => [
'code' => '<?php
$arr = [];
while (rand(0, 1)) {
if (!isset($arr["a"]["b"])) {
$arr["a"]["b"] = "foo";
}
echo $arr["a"]["b"];
}',
],
'conditionalArrayAccessInLoopAfterIssetWithAltAssignment' => [
'code' => '<?php
$arr = [];
while (rand(0, 1)) {
if (rand(0, 1)) {
if (!isset($arr["a"]["b"])) {
$arr["a"]["b"] = "foo";
}
echo $arr["a"]["b"];
} else {
$arr["c"] = "foo";
}
}',
],
'issetVarInLoopBeforeAssignment' => [
'code' => '<?php
function foo() : void {
while (rand(0, 1)) {
if (!isset($foo)) {
$foo = 1;
}
}
}',
],
'issetOnArrayAccess' => [
'code' => '<?php
function foo(ArrayAccess $arr) : void {
$a = isset($arr["a"]) ? $arr["a"] : 4;
takesInt($a);
}
function takesInt(int $i) : void {}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment', 'MixedArgument'],
],
'noParadoxOnMultipleNotIssets' => [
'code' => '<?php
/** @var array */
$array = [];
function sameString(string $string): string {
return $string;
}
if (isset($array[sameString("key1")]) || isset($array[sameString("key2")])) {
throw new \InvalidArgumentException();
}
if (!isset($array[sameString("key3")]) || !isset($array[sameString("key4")])) {
throw new \InvalidArgumentException();
}',
],
'notIssetOneOrOtherSimple' => [
'code' => '<?php
$foo = [
"one" => rand(0,1) ? new DateTime : null,
"two" => rand(0,1) ? new DateTime : null,
"three" => new DateTime
];
if (!(isset($foo["one"]) || isset($foo["two"]))) {
exit;
}
echo $foo["one"]->format("Y");',
'assertions' => [],
'ignored_issues' => ['PossiblyNullReference'],
],
'notIssetOneOrOtherWithoutAssert' => [
'code' => '<?php
$foo = [
"one" => rand(0,1) ? new DateTime : null,
"two" => rand(0,1) ? new DateTime : null,
"three" => new DateTime
];
$a = isset($foo["one"]) || isset($foo["two"]);
echo $foo["one"]->format("Y");',
'assertions' => [],
'ignored_issues' => ['PossiblyNullReference'],
],
'notIssetOneOrOtherWithAssert' => [
'code' => '<?php
$foo = [
"one" => rand(0,1) ? new DateTime : null,
"two" => rand(0,1) ? new DateTime : null,
"three" => new DateTime
];
assert(isset($foo["one"]) || isset($foo["two"]));
echo $foo["one"]->format("Y");',
'assertions' => [],
'ignored_issues' => ['PossiblyNullReference'],
],
'assertArrayAfterIssetStringOffset' => [
'code' => '<?php
/**
* @param string|array $a
*/
function _renderInput($a) : array {
if (isset($a["foo"], $a["bar"])) {
return $a;
}
return [];
}',
],
'assertMoreComplicatedArrayAfterIssetStringOffset' => [
'code' => '<?php
/**
* @param string|int $val
* @param string|array $text
* @param array $data
*/
function _renderInput($val, $text, $data) : array {
if (is_int($val) && isset($text["foo"], $text["bar"])) {
$radio = $text;
} else {
$radio = ["value" => $val, "text" => $text];
}
return $radio;
}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment'],
],
'assertAfterIsset' => [
'code' => '<?php
/**
* @param mixed $arr
*/
function foo($arr) : void {
if (empty($arr)) {
return;
}
if (isset($arr["a"]) && isset($arr["b"])) {}
}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment'],
],
'noCrashAfterIsset' => [
'code' => '<?php
/**
* @param string[] $columns
* @param mixed[] $options
*/
function foo(array $columns, array $options) : void {
$arr = $options["b"];
foreach ($arr as $a) {
if (isset($columns[$a]["c"])) {
return;
}
}
}',
'assertions' => [],
'ignored_issues' => ['MixedAssignment', 'MixedArrayOffset', 'InvalidArrayOffset'],
],
'sessionNullCoalesce' => [
'code' => '<?php
$a = $_SESSION ?? [];',
],
'sessionIssetNull' => [
'code' => '<?php
$a = isset($_SESSION) ? $_SESSION : [];',
],
'issetSeparateNegated' => [
'code' => '<?php
function foo(?string $a, ?string $b): string {
if (!isset($a) || !isset($b)) {
return "";
}
return $a . $b;
}',
],
'issetMultipleNegated' => [
'code' => '<?php
function foo(?string $a, ?string $b): string {
if (!isset($a, $b)) {
return "";
}
return $a . $b;
}',
],
'issetMultipleNegatedWithExtraClause' => [
'code' => '<?php
function foo(?string $a, ?string $b): string {
if (!(isset($a, $b) && rand(0, 1))) {
return "";
}
return $a . $b;
}',
],
'issetMultipleNotNegated' => [
'code' => '<?php
function foo(?string $a, ?string $b): string {
if (isset($a, $b)) {
return $a . $b;
}
return "";
}',
],
'issetNotIssetTest' => [
'code' => '<?php
class B {
/** @var string */
public $c = "hello";
}
function foo(array $a, B $b, string $s): void {
if ($s !== "bar" && !isset($a[$b->c])) {
return;
}
if ($s !== "bar" && isset($a[$b->c])) {
// do something
} else {
// something else
}
}',
],
'issetOnNestedObjectlikeOneLevel' => [
'code' => '<?php
/**
* @param array{a:array} $array
* @return array{a:array{b:mixed, ...}, ...}
* @throw \LogicException
*/
function level3($array) {
if (!isset($array["a"]["b"])) {
throw new \LogicException();
}
return $array;
}',
],
'issetOnStringArrayShouldInformArrayness' => [
'code' => '<?php
/**
* @param string[] $a
* @return array{b: string, ...}
*/
function foo(array $a) {
if (isset($a["b"])) {
return $a;
}
throw new \Exception("bad");
}',
],
'issetOnArrayTwice' => [
'code' => '<?php
function foo(array $options): void {
if (!isset($options["a"])) {
$options["a"] = "hello";
}
if (!isset($options["b"])) {
$options["b"] = 1;
}
if ($options["b"] === 2) {}
}',
],
'listDestructuringErrorSuppress' => [
'code' => '<?php
function foo(string $s) : void {
@list(, $port) = explode(":", $s);
echo isset($port) ? "cool" : "uncool";
}',
],
'listDestructuringErrorSuppressWithFirstString' => [
'code' => '<?php
function foo(string $s) : string {
@list($port, $starboard) = explode(":", $s);
return $port;
}',
],
'accessAfterArrayExistsVariable' => [
'code' => '<?php
abstract class P {
const MAP = [
A::class => 1,
B::class => 2,
C::class => 3,
];
public function foo(string $s) : int {
$a = static::class;
if (!isset(self::MAP[$a])) {
throw new \Exception("bad");
}
return self::MAP[$a];
}
}
class A extends P {}
class B extends P {}
class C extends P {}',
],
'accessAfterArrayExistsStaticClass' => [
'code' => '<?php
abstract class P {
const MAP = [
A::class => 1,
B::class => 2,
C::class => 3,
];
public function foo(string $s) : int {
if (!isset(self::MAP[static::class])) {
throw new \Exception("bad");
}
return self::MAP[static::class];
}
}
class A extends P {}
class B extends P {}
class C extends P {}',
],
'issetCreateTKeyedArrayWithType' => [
'code' => '<?php
function foo(array $options): void {
if (isset($options["a"])) {
$options["b"] = "hello";
}
if (\is_array($options["b"])) {}
}',
],
'issetOnThing' => [
'code' => '<?php
function foo() : void {
$p = [false, false];
$i = rand(0, 1);
if (rand(0, 1) && isset($p[$i])) {
$p[$i] = true;
}
foreach ($p as $q) {
if ($q) {}
}
}',
],
'issetOnNullableObjectWithNullCoalesce' => [
'code' => '<?php
class A {
public bool $s = true;
}
function foo(?A $a) : string {
if (rand(0, 1) && !($a->s ?? false)) {
return "foo";
}
return "bar";
}',
],
'issetOnNullableObjectWithIsset' => [
'code' => '<?php
class A {
public bool $s = true;
}
function foo(?A $a) : string {
if (rand(0, 1) && !(isset($a->s) ? $a->s : false)) {
return "foo";
}
return "bar";
}',
],
'issetOnMethodCallInsideFunctionCall' => [
'code' => '<?php
class C {
public function foo() : ?string {
return null;
}
}
function foo(C $c) : void {
strlen($c->foo() ?? "");
}',
],
'issetOnMethodCallInsideMethodCall' => [
'code' => '<?php
class C {
public function foo() : ?string {
return null;
}
}
function foo(C $c) : void {
new DateTime($c->foo() ?? "");
}',
],
'methodCallAfterIsset' => [
'code' => '<?php
class B {
public function bar() : void {}
}
/** @psalm-suppress MissingConstructor */
class A {
/** @var B */
public $foo;
public function init() : void {
/** @psalm-suppress RedundantPropertyInitializationCheck */
if (isset($this->foo)) {
return;
}
if (rand(0, 1)) {
$this->foo = new B;
} else {
$this->foo = new B;
}
$this->foo->bar();
}
}',
],
'issetOnArrayOfArraysReturningStringInElse' => [
'code' => '<?php
function foo(int $i) : string {
/** @var array<int, array<string, string>> */
$tokens = [];
if (isset($tokens[$i]["a"])) {
return "hello";
} else {
return $tokens[$i]["b"];
}
}',
],
'issetOnArrayOfObjectsAssertingOnIssetValue' => [
'code' => '<?php
class A {
public ?string $name = null;
}
function foo(int $i) : void {
/** @var array<int, A> */
$tokens = [];
if (isset($tokens[$i]->name) && $tokens[$i]->name === "hello") {}
}',
],
'issetOnArrayOfObjectsAssertingOnNotIssetValue' => [
'code' => '<?php
class A {
public ?string $name = null;
}
function foo(int $i) : void {
/** @var array<int, A> */
$tokens = [];
if (!isset($tokens[$i])) {
if (rand(0, 1)) {
if (rand(0, 1)) {
$tokens[$i] = new A();
} else {
return;
}
} else {
return;
}
}
echo $tokens[$i]->name;
}',
],
'issetOnArrayOfMixed' => [
'code' => '<?php
/**
* @psalm-suppress MixedArrayAccess
* @psalm-suppress MixedArgument
*/
function foo(int $i) : void {
/** @var array */
$tokens = [];
if (!isset($tokens[$i]["a"])) {
echo $tokens[$i]["b"];
}
}',
],
'issetOnArrayOfArrays' => [
'code' => '<?php
/**
* @psalm-suppress MixedArgument
*/
function foo(int $i) : void {
/** @var array<array> */
$tokens = [];
if (!isset($tokens[$i]["a"])) {
echo $tokens[$i]["b"];
}
}',
],
'issetOnArrayOfArrayOfStrings' => [
'code' => '<?php
function foo(int $i) : void {
/** @var array<int, array<string, string>> */
$tokens = [];
if (!isset($tokens[$i]["a"])) {
echo $tokens[$i]["b"];
}
}',
],
'noMixedMethodCallAfterIsset' => [
'code' => '<?php
$data = file_get_contents("php://input");
/** @psalm-suppress MixedAssignment */
$payload = json_decode($data, true);
if (!isset($payload["a"]) || rand(0, 1)) {
return;
}
/**
* @psalm-suppress MixedArgument
*/
echo $payload["b"];',
],
'implicitIssetWithStringKeyOnArrayDoesntChangeArrayType' => [
'code' => '<?php
class A {}
function run1(array $arguments): void {
if ($arguments["a"] instanceof A) {}
if ($arguments["b"]) {
/** @psalm-suppress MixedArgument */
echo $arguments["b"];
}
}',
],
'issetOnClassConstantOffset' => [
'code' => '<?php
final class StudyJwtPayload {
public const STUDY_ID = "studid";
public static function fromClaims(array $claims): string
{
if (!isset($claims["usrid"])) {
throw new \InvalidArgumentException();
}
if (!\is_string($claims["usrid"])) {
throw new \InvalidArgumentException();
}
if (!isset($claims[self::STUDY_ID])) {
throw new \InvalidArgumentException();
}
if (!\is_string($claims[self::STUDY_ID])) {
throw new \InvalidArgumentException();
}
return $claims[self::STUDY_ID];
}
}',
],
'noCrashAfterTwoIsset' => [
'code' => '<?php
/** @psalm-suppress MixedArrayOffset */
function foo(array $a, array $b) : void {
if (! isset($b["id"], $a[$b["id"]])) {
echo "z";
}
}',
],
'assertOnPossiblyDefined' => [
'code' => '<?php
function crashes(): void {
if (rand(0,1)) {
$dt = new \DateTime;
}
/**
* @psalm-suppress PossiblyUndefinedVariable
* @psalm-suppress MixedArgument
*/
assert($dt);
}',
],
'issetOnNullableMixed' => [
'code' => '<?php
function processParam(mixed $param) : void {
if (rand(0, 1)) {
$param = null;
}
if (isset($param["name"])) {
/**
* @psalm-suppress MixedArgument
*/
echo $param["name"];
}
}',
'assertions' => [],
'ignored_issues' => [],
'php_version' => '8.0',
],
'assertComplex' => [
'code' => '<?php
function returnsInt(?int $a, ?int $b): int {
assert($a !== null || $b !== null);
return isset($a) ? $a : $b;
}',
],
'assertComplexWithNullCoalesce' => [
'code' => '<?php
function returnsInt(?int $a, ?int $b): int {
assert($a !== null || $b !== null);
return $a ?? $b;
}',
],
'nullCoalesceSimpleArrayOffset' => [
'code' => '<?php
function a(array $arr) : void {
/** @psalm-suppress MixedArgument */
echo isset($arr["a"]["b"]) ? $arr["a"]["b"] : 0;
}
function b(array $arr) : void {
/** @psalm-suppress MixedArgument */
echo $arr["a"]["b"] ?? 0;
}',
],
'coalescePreserveContext' => [
'code' => '<?php
function foo(array $test) : void {
/** @psalm-suppress MixedArgument */
echo $test[0] ?? ( $test[0] = 1 );
/** @psalm-suppress MixedArgument */
echo $test[0];
}',
],
];
}
public function providerInvalidCodeParse(): iterable
{
return [
'complainAboutBadCallInIsset' => [
'code' => '<?php
class A {}
$a = isset(A::foo()[0]);',
'error_message' => 'UndefinedMethod',
],
'issetVariableKeysWithChange' => [
'code' => '<?php
$arr = [[1, 2, 3], null, [1, 2, 3], null];
$b = 2;
$c = 0;
if (isset($arr[$b][$c])) {
$b = 1;
echo $arr[$b][$c];
}',
'error_message' => 'NullArrayAccess',
],
'issetAdditionalVarWithSealedTKeyedArray' => [
'code' => '<?php
class Example {
const FOO = "foo";
public function test() : bool {
$params = ["bar" => "bat"];
if (isset($params[self::FOO])) {
return true;
}
return false;
}
}',
'error_message' => 'InvalidArrayOffset',
],
'undefinedVarInNullCoalesce' => [
'code' => '<?php
function bar(): void {
$do_baz = $config["do_it"] ?? false;
if ($do_baz) {
baz();
}
}',
'error_message' => 'UndefinedVariable',
],
'issetNullVar' => [
'code' => '<?php
function four(?string $s) : void {
if ($s === null) {
if (isset($s)) {}
}
}',
'error_message' => 'TypeDoesNotContainType',
],
'stringIsAlwaysSet' => [
'code' => '<?php
function foo(string $s) : string {
if (!isset($s)) {
return "foo";
}
return "bar";
}',
'error_message' => 'TypeDoesNotContainNull',
],
'issetOnArrayOfArraysReturningString' => [
'code' => '<?php
function foo(int $i) : ?string {
/** @var array<array> */
$tokens = [];
if (!isset($tokens[$i]["a"])) {
return $tokens[$i]["a"];
}
return "hello";
}',
'error_message' => 'PossiblyUndefinedArrayOffset',
],
'accessAfterIssetCheckOnFalsableArray' => [
'code' => '<?php
/**
* @return array{b?: string}|false
*/
function returnPossiblyFalseArray() {
return rand(0, 1) ? false : (rand(0, 1) ? ["b" => "hello"] : []);
}
function foo() : void {
$arr = returnPossiblyFalseArray();
/** @psalm-suppress PossiblyInvalidArrayAccess */
if (!isset($arr["b"])) {}
echo $arr["b"];
}',
'error_message' => 'PossiblyInvalidArrayAccess',
],
'issetOnStaticProperty' => [
'code' => '<?php
class Singleton {
private static self $instance;
public function getInstance(): self {
if (isset(self::$instance)) {
return self::$instance;
}
return self::$instance = new self();
}
private function __construct() {}
}',
'error_message' => 'RedundantPropertyInitializationCheck',
],
'negatedIssetOnStaticProperty' => [
'code' => '<?php
class Singleton {
private static self $instance;
public function getInstance(): self {
if (!isset(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
private function __construct() {}
}',
'error_message' => 'RedundantPropertyInitializationCheck',
],
'setArbitraryListElementAfterIsset' => [
'code' => '<?php
/** @param list<string> $list */
function foo(array &$list, int $offset): void {
if (isset($list[$offset])) {}
$list[$offset] = "";
}',
'error_message' => 'ReferenceConstraintViolation',
],
'setArbitraryListWithinNotIsset' => [
'code' => '<?php
/** @param list<string> $list */
function foo(array &$list, int $offset): void {
if (!isset($list[$offset])) {
$list[$offset] = "";
}
}',
'error_message' => 'ReferenceConstraintViolation',
],
];
}
}