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psalm/tests/ClassTest.php

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<?php
namespace Psalm\Tests;
use function class_exists;
class ClassTest extends TestCase
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{
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use Traits\InvalidCodeAnalysisTestTrait;
use Traits\ValidCodeAnalysisTestTrait;
/**
* @return void
*/
public function testExtendsMysqli()
{
if (class_exists('mysqli') === false) {
$this->markTestSkipped('Cannot run test, base class "mysqli" does not exist!');
return;
}
$this->addFile(
'somefile.php',
'<?php
class db extends mysqli {
public function close()
{
return true;
}
public function prepare(string $sql)
{
return false;
}
public function commit(?int $flags = null, ?string $name = null)
{
return true;
}
public function real_escape_string(string $string)
{
return "escaped";
}
}'
);
}
/**
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* @return iterable<string,array{string,assertions?:array<string,string>,error_levels?:string[]}>
*/
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public function providerValidCodeParse()
{
return [
'overrideProtectedAccessLevelToPublic' => [
'<?php
class A {
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protected function fooFoo(): void {}
}
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class B extends A {
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public function fooFoo(): void {}
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}',
],
'reflectedParents' => [
'<?php
$e = rand(0, 10)
? new RuntimeException("m")
: null;
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if ($e instanceof Exception) {
echo "good";
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}',
],
'namespacedAliasedClassCall' => [
'<?php
namespace Aye {
class Foo {}
}
namespace Bee {
use Aye as A;
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new A\Foo();
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}',
],
'abstractExtendsAbstract' => [
'<?php
abstract class A {
/** @return void */
abstract public function foo();
}
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abstract class B extends A {
/** @return void */
public function bar() {
$this->foo();
}
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}',
],
'missingParentWithFunction' => [
'<?php
class B extends C {
public function fooA() { }
}',
'assertions' => [],
'error_levels' => [
'UndefinedClass',
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'MissingReturnType',
],
],
'subclassWithSimplerArg' => [
'<?php
class A {}
class B extends A {}
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class E1 {
/**
* @param A|B|null $a
*/
public function __construct($a) {
}
}
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class E2 extends E1 {
/**
* @param A|null $a
*/
public function __construct($a) {
parent::__construct($a);
}
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}',
],
'subclassOfInvalidArgumentExceptionWithSimplerArg' => [
'<?php
class A extends InvalidArgumentException {
/**
* @param string $message
* @param int $code
* @param Throwable|null $previous_exception
*/
public function __construct($message, $code, $previous_exception) {
parent::__construct($message, $code, $previous_exception);
}
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}',
],
'classStringInstantiation' => [
'<?php
class Foo {}
class Bar {}
$class = mt_rand(0, 1) === 1 ? Foo::class : Bar::class;
$object = new $class();',
'assertions' => [
'$object' => 'Bar|Foo',
],
],
'instantiateClassAndIsA' => [
'<?php
class Foo {
public function bar() : void{}
}
/**
* @return string|null
*/
function getFooClass() {
return mt_rand(0, 1) === 1 ? Foo::class : null;
}
$foo_class = getFooClass();
if (is_string($foo_class) && is_a($foo_class, Foo::class, true)) {
$foo = new $foo_class();
$foo->bar();
}',
],
'returnStringAfterIsACheckWithClassConst' => [
'<?php
class Foo{}
function bar(string $maybeBaz) : string {
if (!is_a($maybeBaz, Foo::class, true)) {
throw new Exception("not Foo");
}
return $maybeBaz;
}',
],
'returnStringAfterIsACheckWithString' => [
'<?php
class Foo{}
function bar(string $maybeBaz) : string {
if (!is_a($maybeBaz, "Foo", true)) {
throw new Exception("not Foo");
}
return $maybeBaz;
}',
],
'assignAnonymousClassToArray' => [
'<?php
/**
* @param array<string, object> $array
*/
function foo(array $array, string $key) : void {
foreach ($array as $i => $item) {
$array[$key] = new class() {};
if ($array[$i] === $array[$key]) {}
}
}',
],
'getClassSelfClass' => [
'<?php
class C {
public function work(object $obj): string {
if (get_class($obj) === self::class) {
return $obj->baz();
}
return "";
}
public function baz(): string {
return "baz";
}
}',
],
'staticClassComparison' => [
'<?php
class C {
public function foo1(): string {
if (static::class === D::class) {
return $this->baz();
}
return "";
}
public static function foo2(): string {
if (static::class === D::class) {
return static::bat();
}
return "";
}
}
class D extends C {
public function baz(): string {
return "baz";
}
public static function bat(): string {
return "baz";
}
}',
],
'isAStaticClass' => [
'<?php
class C {
public function foo1(): string {
if (is_a(static::class, D::class, true)) {
return $this->baz();
}
return "";
}
public static function foo2(): string {
if (is_a(static::class, D::class, true)) {
return static::bat();
}
return "";
}
}
class D extends C {
public function baz(): string {
return "baz";
}
public static function bat(): string {
return "baz";
}
}',
],
'typedMagicCall' => [
'<?php
class B {
public function __call(string $methodName, array $args) : string {
return __METHOD__;
}
}
class A {
public function __call(string $methodName, array $args) : B {
return new B;
}
}
$a = (new A)->zugzug();
$b = (new A)->bar()->baz();',
'assertions' => [
'$a' => 'B',
'$b' => 'string',
],
],
'abstractCallToInterfaceMethod' => [
'<?php
interface I {
public function fooBar(): array;
}
abstract class A implements I
{
public function g(): array {
return $this->fooBar();
}
}',
],
'noCrashWhenIgnoringUndefinedClass' => [
'<?php
class A extends B {
public function foo() {
parent::bar();
}
}',
'assertions' => [],
'error_levels' => [
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'UndefinedClass',
],
],
'noCrashWhenIgnoringUndefinedParam' => [
'<?php
function bar(iterable $_i) : void {}
function foo(C $c) : void {
bar($c);
}',
'assertions' => [],
'error_levels' => [
'UndefinedClass',
'InvalidArgument',
],
],
'noCrashWhenIgnoringUndefinedReturnIterableArg' => [
'<?php
function bar(iterable $_i) : void {}
function foo() : D {
return new D();
}
bar(foo());',
'assertions' => [],
'error_levels' => [
'UndefinedClass',
'MixedInferredReturnType',
'InvalidArgument',
],
],
'noCrashWhenIgnoringUndefinedReturnClassArg' => [
'<?php
class Exists {}
function bar(Exists $_i) : void {}
function foo() : D {
return new D();
}
bar(foo());',
'assertions' => [],
'error_levels' => [
'UndefinedClass',
'MixedInferredReturnType',
'InvalidArgument',
],
],
'allowAbstractInstantiationOnPossibleChild' => [
'<?php
abstract class A {}
function foo(string $a_class) : void {
if (is_a($a_class, A::class, true)) {
new $a_class();
}
}',
],
'interfaceExistsCreatesClassString' => [
'<?php
function funB(string $className) : ?ReflectionClass {
if (class_exists($className)) {
return new ReflectionClass($className);
}
if (interface_exists($className)) {
return new ReflectionClass($className);
}
return null;
}',
],
'allowClassExistsAndInterfaceExists' => [
'<?php
function foo(string $s) : void {
if (class_exists($s) || interface_exists($s)) {}
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}',
],
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'classExistsWithFalseArg' => [
'<?php
/**
* @param class-string $class
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* @return string
*/
function autoload(string $class) : string {
if (class_exists($class, false)) {
return $class;
}
return $class;
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}',
],
'classExistsWithFalseArgInside' => [
'<?php
function foo(string $s) : void {
if (class_exists($s, false)) {
/** @psalm-suppress MixedMethodCall */
new $s();
}
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}',
],
'classAliasOnNonexistantClass' => [
'<?php
if (!class_exists(\PHPUnit\Framework\TestCase::class)) {
/** @psalm-suppress UndefinedClass */
class_alias(\PHPUnit_Framework_TestCase::class, \PHPUnit\Framework\TestCase::class);
}
class T extends \PHPUnit\Framework\TestCase {
}',
[],
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['PropertyNotSetInConstructor'],
],
'classAliasNoException' => [
'<?php
class_alias("Bar\F1", "Bar\F2");
namespace Bar {
class F1 {
public static function baz() : void {}
}
}
namespace {
Bar\F2::baz();
}',
],
'classAliasEcho' => [
'<?php
class A { }
class_alias("A", "A_A");
echo A_A::class;'
],
];
}
/**
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* @return iterable<string,array{string,error_message:string,2?:string[],3?:bool,4?:string}>
*/
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public function providerInvalidCodeParse()
{
return [
'undefinedClass' => [
'<?php
(new Foo());',
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'error_message' => 'UndefinedClass',
],
'wrongCaseClass' => [
'<?php
class Foo {}
(new foo());',
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'error_message' => 'InvalidClass',
],
'wrongCaseClassWithCall' => [
'<?php
class A {}
needsA(new A);
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function needsA(a $x): void {}',
'error_message' => 'InvalidClass',
],
'invalidThisFetch' => [
'<?php
echo $this;',
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'error_message' => 'InvalidScope',
],
'invalidThisArgument' => [
'<?php
$this = "hello";',
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'error_message' => 'InvalidScope',
],
'undefinedConstant' => [
'<?php
echo HELLO;',
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'error_message' => 'UndefinedConstant',
],
'undefinedClassConstant' => [
'<?php
class A {}
echo A::HELLO;',
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'error_message' => 'UndefinedConstant',
],
'overridePublicAccessLevelToPrivate' => [
'<?php
class A {
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public function fooFoo(): void {}
}
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class B extends A {
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private function fooFoo(): void {}
}',
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'error_message' => 'OverriddenMethodAccess',
],
'overridePublicAccessLevelToProtected' => [
'<?php
class A {
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public function fooFoo(): void {}
}
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class B extends A {
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protected function fooFoo(): void {}
}',
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'error_message' => 'OverriddenMethodAccess',
],
'overrideProtectedAccessLevelToPrivate' => [
'<?php
class A {
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protected function fooFoo(): void {}
}
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class B extends A {
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private function fooFoo(): void {}
}',
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'error_message' => 'OverriddenMethodAccess',
],
'overridePublicPropertyAccessLevelToPrivate' => [
'<?php
class A {
/** @var string|null */
public $foo;
}
class B extends A {
/** @var string|null */
private $foo;
}',
'error_message' => 'OverriddenPropertyAccess',
],
'overridePublicPropertyAccessLevelToProtected' => [
'<?php
class A {
/** @var string|null */
public $foo;
}
class B extends A {
/** @var string|null */
protected $foo;
}',
'error_message' => 'OverriddenPropertyAccess',
],
'overrideProtectedPropertyAccessLevelToPrivate' => [
'<?php
class A {
/** @var string|null */
protected $foo;
}
class B extends A {
/** @var string|null */
private $foo;
}',
'error_message' => 'OverriddenPropertyAccess',
],
'classRedefinition' => [
'<?php
class Foo {}
class Foo {}',
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'error_message' => 'DuplicateClass',
],
'classRedefinitionInNamespace' => [
'<?php
namespace Aye {
class Foo {}
class Foo {}
}',
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'error_message' => 'DuplicateClass',
],
'classRedefinitionInSeparateNamespace' => [
'<?php
namespace Aye {
class Foo {}
}
namespace Aye {
class Foo {}
}',
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'error_message' => 'DuplicateClass',
],
'abstractClassInstantiation' => [
'<?php
abstract class A {}
new A();',
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'error_message' => 'AbstractInstantiation',
],
'abstractClassMethod' => [
'<?php
abstract class A {
abstract public function foo() : void;
}
class B extends A { }',
'error_message' => 'UnimplementedAbstractMethod',
],
'abstractReflectedClassMethod' => [
'<?php
class DedupeIterator extends FilterIterator {
public function __construct(Iterator $i) {
parent::__construct($i);
}
}',
'error_message' => 'UnimplementedAbstractMethod',
],
'missingParent' => [
'<?php
class A extends B { }',
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'error_message' => 'UndefinedClass',
],
'lessSpecificReturnStatement' => [
'<?php
class A {}
class B extends A {}
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function foo(A $a): B {
return $a;
}',
'error_message' => 'LessSpecificReturnStatement',
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],
'circularReference' => [
'<?php
class A extends A {}',
'error_message' => 'CircularReference',
],
'preventAbstractInstantiationDefiniteClasss' => [
'<?php
abstract class A {}
function foo(string $a_class) : void {
if ($a_class === A::class) {
new $a_class();
}
}',
'error_message' => 'AbstractInstantiation',
],
'preventExtendingInterface' => [
'<?php
interface Foo {}
class Bar extends Foo {}',
'error_message' => 'UndefinedClass',
],
'preventImplementingClass' => [
'<?php
class Foo {}
class Bar implements Foo {}',
'error_message' => 'UndefinedInterface',
],
'classAliasAlreadyDefinedClass' => [
'<?php
class A {}
class B {}
if (false) {
class_alias(A::class, B::class);
}
function foo(A $a, B $b) : void {
if ($a === $b) {}
}',
'error_message' => 'TypeDoesNotContainType',
],
];
}
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}