psalm/tests/TryCatchTest.php

<?php
namespace Psalm\Tests;

class TryCatchTest extends TestCase
{
    use Traits\FileCheckerValidCodeParseTestTrait;
    use Traits\FileCheckerInvalidCodeParseTestTrait;

    /**
     * @return array
     */
    public function providerFileCheckerValidCodeParse()
    {
        return [
            'PHP7-addThrowableInterfaceType' => [
                '<?php
                    interface CustomThrowable {}
                    class CustomException extends Exception implements CustomThrowable {}

                    /** @psalm-suppress InvalidCatch */
                    try {
                        throw new CustomException("Bad");
                    } catch (CustomThrowable $e) {
                        echo $e->getMessage();
                    }',
            ],
            'PHP7-rethrowInterfaceExceptionWithoutInvalidThrow' => [
                '<?php
                    interface CustomThrowable {}
                    class CustomException extends Exception implements CustomThrowable {}

                    /** @psalm-suppress InvalidCatch */
                    try {
                        throw new CustomException("Bad");
                    } catch (CustomThrowable $e) {
                        throw $e;
                    }',
            ],
            'tryCatchVar' => [
                '<?php
                    try {
                        $worked = true;
                    }
                    catch (\Exception $e) {
                        $worked = false;
                    }',
                'assertions' => [
                    '$worked' => 'bool',
                ],
            ],
            'alwaysReturnsBecauseCatchDoesNothing' => [
                '<?php
                    function throws() : void {
                        throw new Exception("bad");
                    }
                    function foo() : string {
                        try {
                            throws();
                        } catch (Exception $e) {
                            // do nothing
                        }

                        return "hello";
                    }',
            ],
        ];
    }

    /**
     * @return array
     */
    public function providerFileCheckerInvalidCodeParse()
    {
        return [
            'invalidCatchClass' => [
                '<?php
                    class A {}
                    try {
                        $worked = true;
                    }
                    catch (A $e) {}',
                'error_message' => 'InvalidCatch',
            ],
            'invalidThrowClass' => [
                '<?php
                    class A {}
                    throw new A();',
                'error_message' => 'InvalidThrow',
            ],
        ];
    }
}