mirror of
https://github.com/danog/psalm.git
synced 2024-12-12 09:19:40 +01:00
586 lines
18 KiB
PHP
586 lines
18 KiB
PHP
<?php
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namespace Psalm\Tests;
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use Psalm\Config;
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use Psalm\Context;
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use Psalm\Internal\Analyzer\FileAnalyzer;
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use Psalm\Tests\Internal\Provider;
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class UnusedCodeTest extends TestCase
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{
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/** @var \Psalm\Internal\Analyzer\ProjectAnalyzer */
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protected $project_analyzer;
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/**
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* @return void
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*/
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public function setUp() : void
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{
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FileAnalyzer::clearCache();
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$this->file_provider = new Provider\FakeFileProvider();
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$this->project_analyzer = new \Psalm\Internal\Analyzer\ProjectAnalyzer(
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new TestConfig(),
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new \Psalm\Internal\Provider\Providers(
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$this->file_provider,
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new Provider\FakeParserCacheProvider()
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)
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);
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$this->project_analyzer->getCodebase()->reportUnusedCode();
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$this->project_analyzer->setPhpVersion('7.3');
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}
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/**
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* @dataProvider providerValidCodeParse
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*
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* @param string $code
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* @param array<string> $error_levels
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*
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* @return void
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*/
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public function testValidCode($code, array $error_levels = [])
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{
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$test_name = $this->getTestName();
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if (\strpos($test_name, 'SKIPPED-') !== false) {
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$this->markTestSkipped('Skipped due to a bug.');
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}
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$file_path = self::$src_dir_path . 'somefile.php';
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$this->addFile(
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$file_path,
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$code
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);
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foreach ($error_levels as $error_level) {
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$this->project_analyzer->getCodebase()->config->setCustomErrorLevel($error_level, Config::REPORT_SUPPRESS);
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}
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$context = new Context();
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$context->collect_references = true;
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$this->analyzeFile($file_path, $context);
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$this->project_analyzer->checkClassReferences();
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}
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/**
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* @dataProvider providerInvalidCodeParse
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*
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* @param string $code
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* @param string $error_message
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* @param array<string> $error_levels
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*
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* @return void
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*/
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public function testInvalidCode($code, $error_message, $error_levels = [])
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{
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if (\strpos($this->getTestName(), 'SKIPPED-') !== false) {
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$this->markTestSkipped();
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}
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$this->expectException(\Psalm\Exception\CodeException::class);
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$this->expectExceptionMessageRegExp('/\b' . \preg_quote($error_message, '/') . '\b/');
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$file_path = self::$src_dir_path . 'somefile.php';
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foreach ($error_levels as $error_level) {
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$this->project_analyzer->getCodebase()->config->setCustomErrorLevel($error_level, Config::REPORT_SUPPRESS);
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}
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$this->addFile(
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$file_path,
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$code
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);
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$context = new Context();
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$context->collect_references = true;
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$this->analyzeFile($file_path, $context);
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$this->project_analyzer->checkClassReferences();
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}
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/**
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* @return array<string, array{string}>
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*/
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public function providerValidCodeParse()
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{
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return [
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'magicCall' => [
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'<?php
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class A {
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/** @var string */
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private $value = "default";
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/** @param string[] $args */
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public function __call(string $name, array $args) {
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if (count($args) == 1) {
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$this->modify($name, $args[0]);
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}
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}
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private function modify(string $name, string $value): void {
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call_user_func([$this, "modify" . $name], $value);
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}
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public function modifyFoo(string $value): void {
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$this->value = $value;
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}
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public function getFoo() : string {
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return $this->value;
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}
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}
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$m = new A();
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$m->foo("value");
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$m->modifyFoo("value2");
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echo $m->getFoo();',
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],
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'usedTraitMethodWithExplicitCall' => [
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'<?php
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class A {
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public function foo(): void {
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echo "parent method";
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}
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}
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trait T {
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public function foo(): void {
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echo "trait method";
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}
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}
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class B extends A {
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use T;
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}
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(new A)->foo();
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(new B)->foo();',
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],
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'usedInterfaceMethod' => [
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'<?php
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interface I {
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public function foo(): void;
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}
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class A implements I {
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public function foo(): void {}
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}
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(new A)->foo();',
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],
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'constructorIsUsed' => [
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'<?php
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class A {
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public function __construct() {
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$this->foo();
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}
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private function foo() : void {}
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}
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$a = new A();
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echo (bool) $a;',
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],
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'everythingUsed' => [
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'<?php
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interface I {
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public function foo();
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}
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class B implements I {
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public function foo() : void {}
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}
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class A
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{
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/**
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* @var I
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*/
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private $i;
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/**
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* @param int[] $as
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*/
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public function __construct(array $as) {
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$this->i = new B();
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foreach ($as as $a) {
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$this->a($a, 1);
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}
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}
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private function a(int $a, int $b): self
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{
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$this->v($a, $b);
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$this->i->foo();
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return $this;
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}
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private function v(int $a, int $b): void
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{
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if ($a + $b > 0) {
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throw new \RuntimeException("");
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}
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}
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}
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new A([1, 2, 3]);',
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],
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'unusedParamWithUnderscore' => [
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'<?php
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function foo(int $_) : void {}
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foo(4);',
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],
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'unusedParamWithUnusedPrefix' => [
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'<?php
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function foo(int $unusedArg) : void {}
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foo(4);',
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],
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'possiblyUnusedParamWithUnderscore' => [
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'<?php
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class A {
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public static function foo(int $_ = null) : void {}
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}
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A::foo();',
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],
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'possiblyUnusedParamWithUnusedPrefix' => [
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'<?php
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class A {
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public static function foo(int $unusedArg = null) : void {}
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}
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A::foo();',
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],
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'usedClass' => [
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'<?php
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class A { }
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new A();',
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],
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'usedTraitMethodWithImplicitCall' => [
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'<?php
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class A {
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public function foo() : void {}
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}
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trait T {
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public function foo() : void {}
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}
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class B extends A {
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use T;
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}
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function takesA(A $a) : void {
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$a->foo();
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}
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takesA(new B);',
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],
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'usedMethodInTryCatch' => [
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'<?php
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class A {
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protected function getC() : C {
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return new C;
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}
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}
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class C {
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public function foo() : void {}
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}
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class B extends A {
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public function bar() : void {
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$c = $this->getC();
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foreach ([1, 2, 3] as $_) {
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try {
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$c->foo();
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} catch (Exception $e) {}
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}
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}
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}
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(new B)->bar();',
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],
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'suppressPrivateUnusedMethod' => [
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'<?php
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class A {
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/**
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* @psalm-suppress UnusedMethod
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* @return void
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*/
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private function foo() {}
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}
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new A();',
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],
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'abstractMethodImplementerCoveredByParentCall' => [
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'<?php
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abstract class Foobar {
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public function doIt(): void {
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$this->inner();
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}
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abstract protected function inner(): void;
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}
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class MyFooBar extends Foobar {
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protected function inner(): void {
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// Do nothing
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}
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}
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$myFooBar = new MyFooBar();
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$myFooBar->doIt();',
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],
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'methodUsedAsCallable' => [
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'<?php
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class C {
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public static function foo() : void {}
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}
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function takesCallable(callable $c) : void {
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$c();
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}
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takesCallable([C::class, "foo"]);',
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],
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'propertyAndMethodOverriddenDownstream' => [
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'<?php
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class A {
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/** @var string */
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public $foo = "hello";
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public function bar() : void {}
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}
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class B extends A {
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/** @var string */
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public $foo = "goodbye";
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public function bar() : void {}
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}
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function foo(A $a) : void {
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echo $a->foo;
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$a->bar();
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}
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foo(new B());',
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],
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'protectedPropertyOverriddenDownstream' => [
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'<?php
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class C {
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/** @var int */
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protected $foo = 1;
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public function bar() : int {
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return $this->foo;
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}
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}
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class D extends C {
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protected $foo = 2;
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}
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(new D)->bar();',
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],
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'usedClassAfterExtensionLoaded' => [
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'<?php
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class A {
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public function __construct() {}
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}
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if (extension_loaded("fdsfdsfd")) {
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new A();
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}',
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],
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'usedParamInIf' => [
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'<?php
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class O {}
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class C {
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private bool $a = false;
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public array $_types = [];
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private static function mirror(array $a) : array {
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return $a;
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}
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/**
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* @param class-string<O>|null $type
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* @return self
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*/
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public function addType(?string $type, array $ids = array())
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{
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if ($this->a) {
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$ids = self::mirror($ids);
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}
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$this->_types[$type ?: ""] = new ArrayObject($ids);
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return $this;
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}
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}
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(new C)->addType(null);',
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],
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'usedMethodAfterClassExists' => [
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'<?php
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class A {
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public static function bar() : void {}
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}
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if (class_exists(A::class)) {
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A::bar();
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}',
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],
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];
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}
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/**
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* @return array<string,array{string,error_message:string}>
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*/
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public function providerInvalidCodeParse()
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{
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return [
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'unusedClass' => [
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'<?php
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class A { }',
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'error_message' => 'UnusedClass',
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],
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'publicUnusedMethod' => [
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'<?php
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class A {
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/** @return void */
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public function foo() {}
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}
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new A();',
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'error_message' => 'PossiblyUnusedMethod',
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],
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'possiblyUnusedParam' => [
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'<?php
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class A {
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/** @return void */
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public function foo(int $i) {}
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}
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(new A)->foo(4);',
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'error_message' => 'PossiblyUnusedParam - src' . \DIRECTORY_SEPARATOR
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. 'somefile.php:4:49 - Param #1 is never referenced in this method',
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],
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'unusedParam' => [
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'<?php
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function foo(int $i) {}
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foo(4);',
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'error_message' => 'UnusedParam',
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],
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'possiblyUnusedProperty' => [
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'<?php
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class A {
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/** @var string */
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public $foo = "hello";
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}
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$a = new A();',
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'error_message' => 'PossiblyUnusedProperty',
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'error_levels' => ['UnusedVariable'],
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],
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'unusedProperty' => [
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'<?php
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class A {
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/** @var string */
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private $foo = "hello";
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}
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$a = new A();',
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'error_message' => 'UnusedProperty',
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'error_levels' => ['UnusedVariable'],
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],
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'privateUnusedMethod' => [
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'<?php
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class A {
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/** @return void */
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private function foo() {}
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}
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new A();',
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'error_message' => 'UnusedMethod',
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],
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'unevaluatedCode' => [
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'<?php
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function foo(): void {
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return;
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$a = "foo";
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}',
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'error_message' => 'UnevaluatedCode',
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],
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'unusedTraitMethodInParent' => [
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'<?php
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class A {
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public function foo() : void {}
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}
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trait T {
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public function foo() : void {}
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public function bar() : void {}
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}
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class B extends A {
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use T;
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}
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function takesA(A $a) : void {
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$a->foo();
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}
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takesA(new B);',
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'error_message' => 'PossiblyUnusedMethod',
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],
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'unusedRecursivelyUsedMethod' => [
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'<?php
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class C {
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public function foo() : void {
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if (rand(0, 1)) {
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$this->foo();
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}
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}
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public function bar() : void {}
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}
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(new C)->bar();',
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'error_message' => 'PossiblyUnusedMethod',
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],
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'unusedRecursivelyUsedStaticMethod' => [
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'<?php
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class C {
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public static function foo() : void {
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if (rand(0, 1)) {
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self::foo();
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}
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}
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public function bar() : void {}
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}
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(new C)->bar();',
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'error_message' => 'PossiblyUnusedMethod',
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],
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'propertyOverriddenDownstreamAndNotUsed' => [
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'<?php
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class A {
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/** @var string */
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public $foo = "hello";
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}
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class B extends A {
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/** @var string */
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public $foo = "goodbye";
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}
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new B();',
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'error_message' => 'PossiblyUnusedProperty',
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],
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];
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}
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}
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