<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Framework;

use const E_USER_DEPRECATED;
use const E_USER_ERROR;
use const E_USER_NOTICE;
use const E_USER_WARNING;
use const PHP_EOL;
use function array_map;
use function get_class;
use function getcwd;
use function ini_get;
use function ini_set;
use function trigger_error;
use DependencyFailureTest;
use DependencyInputTest;
use DependencyOnClassTest;
use DependencySuccessTest;
use InvalidArgumentException;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\MockObject\Stub;
use PHPUnit\Runner\BaseTestRunner;
use PHPUnit\TestFixture\ChangeCurrentWorkingDirectoryTest;
use PHPUnit\TestFixture\ClassWithScalarTypeDeclarations;
use PHPUnit\TestFixture\DoNoAssertionTestCase;
use PHPUnit\TestFixture\ExceptionInAssertPostConditionsTest;
use PHPUnit\TestFixture\ExceptionInAssertPreConditionsTest;
use PHPUnit\TestFixture\ExceptionInSetUpTest;
use PHPUnit\TestFixture\ExceptionInTearDownTest;
use PHPUnit\TestFixture\ExceptionInTest;
use PHPUnit\TestFixture\ExceptionInTestDetectedInTeardown;
use PHPUnit\TestFixture\Failure;
use PHPUnit\TestFixture\IsolationTest;
use PHPUnit\TestFixture\Mockable;
use PHPUnit\TestFixture\NoArgTestCaseTest;
use PHPUnit\TestFixture\OutputTestCase;
use PHPUnit\TestFixture\RequirementsTest;
use PHPUnit\TestFixture\Singleton;
use PHPUnit\TestFixture\Success;
use PHPUnit\TestFixture\TestAutoreferenced;
use PHPUnit\TestFixture\TestError;
use PHPUnit\TestFixture\TestIncomplete;
use PHPUnit\TestFixture\TestSkipped;
use PHPUnit\TestFixture\TestWithDifferentNames;
use PHPUnit\TestFixture\TestWithDifferentOutput;
use PHPUnit\TestFixture\TestWithDifferentSizes;
use PHPUnit\TestFixture\TestWithDifferentStatuses;
use PHPUnit\TestFixture\ThrowExceptionTestCase;
use PHPUnit\TestFixture\ThrowNoExceptionTestCase;
use PHPUnit\TestFixture\WasRun;
use PHPUnit\Util\Test as TestUtil;
use RuntimeException;
use TypeError;

class TestCaseTest extends TestCase
{
    protected static $testStatic = 456;

    protected $backupGlobalsExcludeList = ['i', 'singleton'];

    public static function setUpBeforeClass(): void
    {
        $GLOBALS['a']  = 'a';
        $_ENV['b']     = 'b';
        $_POST['c']    = 'c';
        $_GET['d']     = 'd';
        $_COOKIE['e']  = 'e';
        $_SERVER['f']  = 'f';
        $_FILES['g']   = 'g';
        $_REQUEST['h'] = 'h';
        $GLOBALS['i']  = 'i';
    }

    public static function tearDownAfterClass(): void
    {
        unset(
            $GLOBALS['a'],
            $_ENV['b'],
            $_POST['c'],
            $_GET['d'],
            $_COOKIE['e'],
            $_SERVER['f'],
            $_FILES['g'],
            $_REQUEST['h'],
            $GLOBALS['i']
        );
    }

    /**
     * @testdox TestCase::toSring()
     */
    public function testCaseToString(): void
    {
        $this->assertEquals(
            'PHPUnit\Framework\TestCaseTest::testCaseToString',
            $this->toString()
        );
    }

    /**
     * @testdox TestCase has sensible defaults for execution reordering
     */
    public function testCaseDefaultExecutionOrderDependencies(): void
    {
        $this->assertInstanceOf(Reorderable::class, $this);

        $this->assertEquals(
            [new ExecutionOrderDependency(get_class($this), 'testCaseDefaultExecutionOrderDependencies')],
            $this->provides()
        );

        $this->assertEquals(
            [],
            $this->requires()
        );
    }

    public function testSuccess(): void
    {
        $test   = new Success;
        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_PASSED, $test->getStatus());
        $this->assertEquals(0, $result->errorCount());
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(0, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    public function testFailure(): void
    {
        $test   = new Failure;
        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_FAILURE, $test->getStatus());
        $this->assertEquals(0, $result->errorCount());
        $this->assertEquals(1, $result->failureCount());
        $this->assertEquals(0, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    public function testError(): void
    {
        $test   = new TestError;
        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_ERROR, $test->getStatus());
        $this->assertEquals(1, $result->errorCount());
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(0, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    public function testSkipped(): void
    {
        $test   = new TestSkipped;
        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_SKIPPED, $test->getStatus());
        $this->assertEquals('Skipped test', $test->getStatusMessage());
        $this->assertEquals(0, $result->errorCount());
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(1, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    public function testIncomplete(): void
    {
        $test   = new TestIncomplete;
        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_INCOMPLETE, $test->getStatus());
        $this->assertEquals('Incomplete test', $test->getStatusMessage());
        $this->assertEquals(0, $result->errorCount());
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(0, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    public function testExceptionInSetUp(): void
    {
        $test = new ExceptionInSetUpTest('testSomething');
        $test->run();

        $this->assertTrue($test->setUp);
        $this->assertFalse($test->assertPreConditions);
        $this->assertFalse($test->testSomething);
        $this->assertFalse($test->assertPostConditions);
        $this->assertTrue($test->tearDown);
    }

    public function testExceptionInAssertPreConditions(): void
    {
        $test = new ExceptionInAssertPreConditionsTest('testSomething');
        $test->run();

        $this->assertTrue($test->setUp);
        $this->assertTrue($test->assertPreConditions);
        $this->assertFalse($test->testSomething);
        $this->assertFalse($test->assertPostConditions);
        $this->assertTrue($test->tearDown);
    }

    public function testExceptionInTest(): void
    {
        $test = new ExceptionInTest('testSomething');
        $test->run();

        $this->assertTrue($test->setUp);
        $this->assertTrue($test->assertPreConditions);
        $this->assertTrue($test->testSomething);
        $this->assertFalse($test->assertPostConditions);
        $this->assertTrue($test->tearDown);
    }

    public function testExceptionInAssertPostConditions(): void
    {
        $test = new ExceptionInAssertPostConditionsTest('testSomething');
        $test->run();

        $this->assertTrue($test->setUp);
        $this->assertTrue($test->assertPreConditions);
        $this->assertTrue($test->testSomething);
        $this->assertTrue($test->assertPostConditions);
        $this->assertTrue($test->tearDown);
    }

    public function testExceptionInTearDown(): void
    {
        $test = new ExceptionInTearDownTest('testSomething');
        $test->run();

        $this->assertTrue($test->setUp);
        $this->assertTrue($test->assertPreConditions);
        $this->assertTrue($test->testSomething);
        $this->assertTrue($test->assertPostConditions);
        $this->assertTrue($test->tearDown);
        $this->assertEquals(BaseTestRunner::STATUS_ERROR, $test->getStatus());
        $this->assertSame('throw Exception in tearDown()', $test->getStatusMessage());
    }

    public function testExceptionInTestIsDetectedInTeardown(): void
    {
        $test = new ExceptionInTestDetectedInTeardown('testSomething');
        $test->run();

        $this->assertTrue($test->exceptionDetected);
    }

    public function testNoArgTestCasePasses(): void
    {
        $result = new TestResult;
        $t      = new TestSuite(NoArgTestCaseTest::class);

        $t->run($result);

        $this->assertCount(1, $result);
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(0, $result->errorCount());
    }

    public function testWasRun(): void
    {
        $test = new WasRun;
        $test->run();

        $this->assertTrue($test->wasRun);
    }

    public function testException(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectExceptionAllowsAccessingExpectedException(): void
    {
        $exception = RuntimeException::class;

        $test = new ThrowExceptionTestCase('test');

        $test->expectException($exception);

        $this->assertSame($exception, $test->getExpectedException());
    }

    public function testExpectExceptionCodeWithSameCode(): void
    {
        $test = new ThrowExceptionTestCase('test');

        $test->expectExceptionCode(0);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectExceptionCodeWithDifferentCode(): void
    {
        $test = new ThrowExceptionTestCase('test');

        $test->expectExceptionCode(9000);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testExpectExceptionCodeAllowsAccessingExpectedExceptionCode(): void
    {
        $code = 9000;

        $test = new ThrowExceptionTestCase('test');

        $test->expectExceptionCode($code);

        $this->assertSame($code, $test->getExpectedExceptionCode());
    }

    public function testExceptionWithEmptyMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExceptionWithNullMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExceptionWithMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);
        $test->expectExceptionMessage('A runtime error occurred');

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExceptionWithWrongMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);
        $test->expectExceptionMessage('A logic error occurred');

        $result = $test->run();

        $this->assertEquals(1, $result->failureCount());
        $this->assertCount(1, $result);
        $this->assertEquals(
            "Failed asserting that exception message 'A runtime error occurred' contains 'A logic error occurred'.",
            $test->getStatusMessage()
        );
    }

    public function testExpectExceptionMessageAllowsAccessingExpectedExceptionMessage(): void
    {
        $message = 'A runtime error occurred';

        $test = new ThrowExceptionTestCase('test');

        $test->expectExceptionMessage($message);

        $this->assertSame($message, $test->getExpectedExceptionMessage());
    }

    public function testExceptionWithRegexpMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);
        $test->expectExceptionMessageMatches('/runtime .*? occurred/');

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testexpectExceptionMessageMatchesAllowsAccessingExpectedExceptionRegExp(): void
    {
        $messageRegExp = '/runtime .*? occurred/';

        $test = new ThrowExceptionTestCase('test');

        $test->expectExceptionMessageMatches($messageRegExp);

        $this->assertSame($messageRegExp, $test->getExpectedExceptionMessageRegExp());
    }

    public function testExceptionWithWrongRegexpMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);
        $test->expectExceptionMessageMatches('/logic .*? occurred/');

        $result = $test->run();

        $this->assertEquals(1, $result->failureCount());
        $this->assertCount(1, $result);
        $this->assertEquals(
            "Failed asserting that exception message 'A runtime error occurred' matches '/logic .*? occurred/'.",
            $test->getStatusMessage()
        );
    }

    public function testExceptionWithInvalidRegexpMessage(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(RuntimeException::class);
        $test->expectExceptionMessageMatches('#runtime .*? occurred/');

        $test->run();

        $this->assertEquals(
            "Invalid expected exception message regex given: '#runtime .*? occurred/'",
            $test->getStatusMessage()
        );
    }

    public function testExpectExceptionObjectWithDifferentExceptionClass(): void
    {
        $exception = new InvalidArgumentException(
            'Cannot compute at this time.',
            9000
        );

        $test = new ThrowExceptionTestCase('testWithExpectExceptionObject');

        $test->expectExceptionObject($exception);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testExpectExceptionObjectWithDifferentExceptionMessage(): void
    {
        $exception = new RuntimeException(
            'This is fine!',
            9000
        );

        $test = new ThrowExceptionTestCase('testWithExpectExceptionObject');

        $test->expectExceptionObject($exception);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testExpectExceptionObjectWithDifferentExceptionCode(): void
    {
        $exception = new RuntimeException(
            'Cannot compute at this time.',
            9001
        );

        $test = new ThrowExceptionTestCase('testWithExpectExceptionObject');

        $test->expectExceptionObject($exception);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testExpectExceptionObjectWithEqualException(): void
    {
        $exception = new RuntimeException(
            'Cannot compute at this time',
            9000
        );

        $test = new ThrowExceptionTestCase('testWithExpectExceptionObject');

        $test->expectExceptionObject($exception);

        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectExceptionObjectAllowsAccessingExpectedExceptionDetails(): void
    {
        $exception = new RuntimeException(
            'Cannot compute at this time',
            9000
        );

        $test = new ThrowExceptionTestCase('testWithExpectExceptionObject');

        $test->expectExceptionObject($exception);

        $this->assertSame(get_class($exception), $test->getExpectedException());
        $this->assertSame($exception->getCode(), $test->getExpectedExceptionCode());
        $this->assertSame($exception->getMessage(), $test->getExpectedExceptionMessage());
    }

    public function testNoException(): void
    {
        $test = new ThrowNoExceptionTestCase('test');
        $test->expectException(RuntimeException::class);

        $result = $test->run();

        $this->assertEquals(1, $result->failureCount());
        $this->assertCount(1, $result);
    }

    public function testWrongException(): void
    {
        $test = new ThrowExceptionTestCase('test');
        $test->expectException(InvalidArgumentException::class);

        $result = $test->run();

        $this->assertEquals(1, $result->failureCount());
        $this->assertCount(1, $result);
    }

    public function testDoesNotPerformAssertions(): void
    {
        $test = new DoNoAssertionTestCase('testNothing');
        $test->expectNotToPerformAssertions();

        $result = $test->run();

        $this->assertEquals(0, $result->riskyCount());
        $this->assertCount(1, $result);
    }

    /**
     * @backupGlobals enabled
     */
    public function testGlobalsBackupPre(): void
    {
        global $a;
        global $i;

        $this->assertEquals('a', $a);
        $this->assertEquals('a', $GLOBALS['a']);
        $this->assertEquals('b', $_ENV['b']);
        $this->assertEquals('c', $_POST['c']);
        $this->assertEquals('d', $_GET['d']);
        $this->assertEquals('e', $_COOKIE['e']);
        $this->assertEquals('f', $_SERVER['f']);
        $this->assertEquals('g', $_FILES['g']);
        $this->assertEquals('h', $_REQUEST['h']);
        $this->assertEquals('i', $i);
        $this->assertEquals('i', $GLOBALS['i']);

        $GLOBALS['a']   = 'aa';
        $GLOBALS['foo'] = 'bar';
        $_ENV['b']      = 'bb';
        $_POST['c']     = 'cc';
        $_GET['d']      = 'dd';
        $_COOKIE['e']   = 'ee';
        $_SERVER['f']   = 'ff';
        $_FILES['g']    = 'gg';
        $_REQUEST['h']  = 'hh';
        $GLOBALS['i']   = 'ii';

        $this->assertEquals('aa', $a);
        $this->assertEquals('aa', $GLOBALS['a']);
        $this->assertEquals('bar', $GLOBALS['foo']);
        $this->assertEquals('bb', $_ENV['b']);
        $this->assertEquals('cc', $_POST['c']);
        $this->assertEquals('dd', $_GET['d']);
        $this->assertEquals('ee', $_COOKIE['e']);
        $this->assertEquals('ff', $_SERVER['f']);
        $this->assertEquals('gg', $_FILES['g']);
        $this->assertEquals('hh', $_REQUEST['h']);
        $this->assertEquals('ii', $i);
        $this->assertEquals('ii', $GLOBALS['i']);
    }

    /**
     * @depends testGlobalsBackupPre
     */
    public function testGlobalsBackupPost(): void
    {
        global $a;
        global $i;

        $this->assertEquals('a', $a);
        $this->assertEquals('a', $GLOBALS['a']);
        $this->assertEquals('b', $_ENV['b']);
        $this->assertEquals('c', $_POST['c']);
        $this->assertEquals('d', $_GET['d']);
        $this->assertEquals('e', $_COOKIE['e']);
        $this->assertEquals('f', $_SERVER['f']);
        $this->assertEquals('g', $_FILES['g']);
        $this->assertEquals('h', $_REQUEST['h']);
        $this->assertEquals('ii', $i);
        $this->assertEquals('ii', $GLOBALS['i']);

        $this->assertArrayNotHasKey('foo', $GLOBALS);
    }

    /**
     * @backupGlobals enabled
     * @backupStaticAttributes enabled
     * @depends testGlobalsBackupPost
     *
     * @doesNotPerformAssertions
     */
    public function testStaticAttributesBackupPre(): void
    {
        $GLOBALS['singleton'] = Singleton::getInstance();
        $GLOBALS['i']         = 'set by testStaticAttributesBackupPre';

        $GLOBALS['j']     = 'reset by backup';
        self::$testStatic = 123;
    }

    /**
     * @depends testStaticAttributesBackupPre
     */
    public function testStaticAttributesBackupPost(): void
    {
        // Snapshots made by @backupGlobals
        $this->assertSame(Singleton::getInstance(), $GLOBALS['singleton']);
        $this->assertSame('set by testStaticAttributesBackupPre', $GLOBALS['i']);

        // Reset global
        $this->assertArrayNotHasKey('j', $GLOBALS);

        // Static reset to original state by @backupStaticAttributes
        $this->assertSame(456, self::$testStatic);
    }

    public function testIsInIsolationReturnsFalse(): void
    {
        $test   = new IsolationTest('testIsInIsolationReturnsFalse');
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testIsInIsolationReturnsTrue(): void
    {
        $test = new IsolationTest('testIsInIsolationReturnsTrue');
        $test->setRunTestInSeparateProcess(true);
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectOutputStringFooActualFoo(): void
    {
        $test   = new OutputTestCase('testExpectOutputStringFooActualFoo');
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectOutputStringFooActualBar(): void
    {
        $test   = new OutputTestCase('testExpectOutputStringFooActualBar');
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testExpectOutputRegexFooActualFoo(): void
    {
        $test   = new OutputTestCase('testExpectOutputRegexFooActualFoo');
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertTrue($result->wasSuccessful());
    }

    public function testExpectOutputRegexFooActualBar(): void
    {
        $test   = new OutputTestCase('testExpectOutputRegexFooActualBar');
        $result = $test->run();

        $this->assertCount(1, $result);
        $this->assertFalse($result->wasSuccessful());
    }

    public function testSkipsIfRequiresHigherVersionOfPHPUnit(): void
    {
        $test   = new RequirementsTest('testAlwaysSkip');
        $result = $test->run();

        $this->assertEquals(1, $result->skippedCount());
        $this->assertEquals(
            'PHPUnit >= 1111111 is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresHigherVersionOfPHP(): void
    {
        $test   = new RequirementsTest('testAlwaysSkip2');
        $result = $test->run();

        $this->assertEquals(1, $result->skippedCount());
        $this->assertEquals(
            'PHP >= 9999999 is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresNonExistingOs(): void
    {
        $test   = new RequirementsTest('testAlwaysSkip3');
        $result = $test->run();

        $this->assertEquals(1, $result->skippedCount());
        $this->assertEquals(
            'Operating system matching /DOESNOTEXIST/i is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresNonExistingOsFamily(): void
    {
        $test   = new RequirementsTest('testAlwaysSkip4');
        $result = $test->run();

        $this->assertEquals(1, $result->skippedCount());
        $this->assertEquals(
            'Operating system DOESNOTEXIST is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresNonExistingFunction(): void
    {
        $test   = new RequirementsTest('testNine');
        $result = $test->run();

        $this->assertEquals(1, $result->skippedCount());
        $this->assertEquals(
            'Function testFunc is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresNonExistingExtension(): void
    {
        $test = new RequirementsTest('testTen');
        $test->run();

        $this->assertEquals(
            'Extension testExt is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsIfRequiresExtensionWithAMinimumVersion(): void
    {
        $test = new RequirementsTest('testSpecificExtensionVersion');
        $test->run();

        $this->assertEquals(
            'Extension testExt >= 1.8.0 is required.',
            $test->getStatusMessage()
        );
    }

    public function testSkipsProvidesMessagesForAllSkippingReasons(): void
    {
        $test = new RequirementsTest('testAllPossibleRequirements');
        $test->run();

        $this->assertEquals(
            'PHP >= 99-dev is required.' . PHP_EOL .
            'PHPUnit >= 99-dev is required.' . PHP_EOL .
            'Operating system matching /DOESNOTEXIST/i is required.' . PHP_EOL .
            'Function testFuncOne is required.' . PHP_EOL .
            'Function testFunc2 is required.' . PHP_EOL .
            'Setting "not_a_setting" must be "Off".' . PHP_EOL .
            'Extension testExtOne is required.' . PHP_EOL .
            'Extension testExt2 is required.' . PHP_EOL .
            'Extension testExtThree >= 2.0 is required.',
            $test->getStatusMessage()
        );
    }

    public function testRequiringAnExistingMethodDoesNotSkip(): void
    {
        $test   = new RequirementsTest('testExistingMethod');
        $result = $test->run();
        $this->assertEquals(0, $result->skippedCount());
    }

    public function testRequiringAnExistingFunctionDoesNotSkip(): void
    {
        $test   = new RequirementsTest('testExistingFunction');
        $result = $test->run();
        $this->assertEquals(0, $result->skippedCount());
    }

    public function testRequiringAnExistingExtensionDoesNotSkip(): void
    {
        $test   = new RequirementsTest('testExistingExtension');
        $result = $test->run();
        $this->assertEquals(0, $result->skippedCount());
    }

    public function testRequiringAnExistingOsDoesNotSkip(): void
    {
        $test   = new RequirementsTest('testExistingOs');
        $result = $test->run();
        $this->assertEquals(0, $result->skippedCount());
    }

    public function testRequiringASetting(): void
    {
        $test = new RequirementsTest('testSettingDisplayErrorsOn');

        // Get this so we can return it to whatever it was before the test.
        $displayErrorsVal = ini_get('display_errors');

        ini_set('display_errors', 'On');
        $result = $test->run();
        $this->assertEquals(0, $result->skippedCount());

        ini_set('display_errors', 'Off');
        $result = $test->run();
        $this->assertEquals(1, $result->skippedCount());

        ini_set('display_errors', $displayErrorsVal);
    }

    public function testCurrentWorkingDirectoryIsRestored(): void
    {
        $expectedCwd = getcwd();

        $test = new ChangeCurrentWorkingDirectoryTest('testSomethingThatChangesTheCwd');
        $test->run();

        $this->assertSame($expectedCwd, getcwd());
    }

    /**
     * @requires PHP 7
     */
    public function testTypeErrorCanBeExpected(): void
    {
        $o = new ClassWithScalarTypeDeclarations;

        $this->expectException(TypeError::class);

        $o->foo(null, null);
    }

    public function testCreateMockFromClassName(): void
    {
        $mock = $this->createMock(Mockable::class);

        $this->assertInstanceOf(Mockable::class, $mock);
        $this->assertInstanceOf(MockObject::class, $mock);
    }

    public function testCreateMockMocksAllMethods(): void
    {
        $mock = $this->createMock(Mockable::class);

        $this->assertNull($mock->mockableMethod());
        $this->assertNull($mock->anotherMockableMethod());
    }

    public function testCreateStubFromClassName(): void
    {
        $mock = $this->createStub(Mockable::class);

        $this->assertInstanceOf(Mockable::class, $mock);
        $this->assertInstanceOf(Stub::class, $mock);
    }

    public function testCreateStubStubsAllMethods(): void
    {
        $mock = $this->createStub(Mockable::class);

        $this->assertNull($mock->mockableMethod());
        $this->assertNull($mock->anotherMockableMethod());
    }

    public function testCreatePartialMockDoesNotMockAllMethods(): void
    {
        /** @var Mockable $mock */
        $mock = $this->createPartialMock(Mockable::class, ['mockableMethod']);

        $this->assertNull($mock->mockableMethod());
        $this->assertTrue($mock->anotherMockableMethod());
    }

    public function testCreatePartialMockCanMockNoMethods(): void
    {
        /** @var Mockable $mock */
        $mock = $this->createPartialMock(Mockable::class, []);

        $this->assertTrue($mock->mockableMethod());
        $this->assertTrue($mock->anotherMockableMethod());
    }

    public function testCreatePartialMockWithFakeMethods(): void
    {
        $test = new TestWithDifferentStatuses('testWithCreatePartialMockWarning');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_WARNING, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testCreatePartialMockWithRealMethods(): void
    {
        $test = new TestWithDifferentStatuses('testWithCreatePartialMockPassesNoWarning');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_PASSED, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testCreateMockSkipsConstructor(): void
    {
        $mock = $this->createMock(Mockable::class);

        $this->assertNull($mock->constructorArgs);
    }

    public function testCreateMockDisablesOriginalClone(): void
    {
        $mock = $this->createMock(Mockable::class);

        $cloned = clone $mock;
        $this->assertNull($cloned->cloned);
    }

    public function testCreateStubSkipsConstructor(): void
    {
        $mock = $this->createStub(Mockable::class);

        $this->assertNull($mock->constructorArgs);
    }

    public function testCreateStubDisablesOriginalClone(): void
    {
        $mock = $this->createStub(Mockable::class);

        $cloned = clone $mock;
        $this->assertNull($cloned->cloned);
    }

    public function testConfiguredMockCanBeCreated(): void
    {
        /** @var Mockable $mock */
        $mock = $this->createConfiguredMock(
            Mockable::class,
            [
                'mockableMethod' => false,
            ]
        );

        $this->assertFalse($mock->mockableMethod());
        $this->assertNull($mock->anotherMockableMethod());
    }

    public function testProvidingOfAutoreferencedArray(): void
    {
        $test = new TestAutoreferenced('testJsonEncodeException', $this->getAutoreferencedArray());
        $test->runBare();

        $this->assertIsArray($test->myTestData);
        $this->assertArrayHasKey('data', $test->myTestData);
        $this->assertEquals($test->myTestData['data'][0], $test->myTestData['data']);
    }

    public function testProvidingArrayThatMixesObjectsAndScalars(): void
    {
        $data = [
            [123],
            ['foo'],
            [$this->createMock(Mockable::class)],
            [$this->createStub(Mockable::class)],
        ];

        $test = new TestAutoreferenced('testJsonEncodeException', [$data]);
        $test->runBare();

        $this->assertIsArray($test->myTestData);
        $this->assertSame($data, $test->myTestData);
    }

    public function testGettingNullTestResultObject(): void
    {
        $test = new Success;
        $this->assertNull($test->getTestResultObject());
    }

    public function testSizeUnknown(): void
    {
        $test = new TestWithDifferentSizes('testWithSizeUnknown');

        $this->assertFalse($test->hasSize());

        $this->assertSame(TestUtil::UNKNOWN, $test->getSize());

        $this->assertFalse($test->isLarge());
        $this->assertFalse($test->isMedium());
        $this->assertFalse($test->isSmall());
    }

    public function testSizeLarge(): void
    {
        $test = new TestWithDifferentSizes('testWithSizeLarge');

        $this->assertTrue($test->hasSize());

        $this->assertSame(TestUtil::LARGE, $test->getSize());

        $this->assertTrue($test->isLarge());
        $this->assertFalse($test->isMedium());
        $this->assertFalse($test->isSmall());
    }

    public function testSizeMedium(): void
    {
        $test = new TestWithDifferentSizes('testWithSizeMedium');

        $this->assertTrue($test->hasSize());

        $this->assertSame(TestUtil::MEDIUM, $test->getSize());

        $this->assertFalse($test->isLarge());
        $this->assertTrue($test->isMedium());
        $this->assertFalse($test->isSmall());
    }

    public function testSizeSmall(): void
    {
        $test = new TestWithDifferentSizes('testWithSizeSmall');

        $this->assertTrue($test->hasSize());

        $this->assertSame(TestUtil::SMALL, $test->getSize());

        $this->assertFalse($test->isLarge());
        $this->assertFalse($test->isMedium());
        $this->assertTrue($test->isSmall());
    }

    public function testCanUseDependsToDependOnSuccessfulClass(): void
    {
        $result = new TestResult();
        $suite  = new TestSuite();
        $suite->addTestSuite(DependencySuccessTest::class);
        $suite->addTestSuite(DependencyFailureTest::class);
        $suite->addTestSuite(DependencyOnClassTest::class);
        $suite->run($result);

        // Confirm only the passing TestSuite::class has passed
        $this->assertContains(DependencySuccessTest::class, $result->passedClasses());
        $this->assertNotContains(DependencyFailureTest::class, $result->passedClasses());

        // Confirm the test depending on the passing TestSuite::class did run and has passed
        $this->assertArrayHasKey(DependencyOnClassTest::class . '::testThatDependsOnASuccessfulClass', $result->passed());

        // Confirm the test depending on the failing TestSuite::class has been warn-skipped
        $skipped = array_map(static function (TestFailure $t) {
            return $t->getTestName();
        }, $result->skipped());
        $this->assertContains(DependencyOnClassTest::class . '::testThatDependsOnAFailingClass', $skipped);
    }

    public function testGetNameReturnsMethodName(): void
    {
        $methodName = 'testWithName';

        $testCase = new TestWithDifferentNames($methodName);

        $this->assertSame($methodName, $testCase->getName());
    }

    public function testGetNameReturnsEmptyStringAsDefault(): void
    {
        $testCase = new TestWithDifferentNames();

        $this->assertSame('', $testCase->getName());
    }

    /**
     * @dataProvider providerInvalidName
     */
    public function testRunBareThrowsExceptionWhenTestHasInvalidName($name): void
    {
        $testCase = new TestWithDifferentNames($name);

        $this->expectException(Exception::class);
        $this->expectExceptionMessage('PHPUnit\Framework\TestCase::$name must be a non-blank string.');

        $testCase->runBare();
    }

    public function providerInvalidName(): array
    {
        return [
            'null'         => [null],
            'string-empty' => [''],
            'string-blank' => ['  '],
        ];
    }

    public function testHasFailedReturnsFalseWhenTestHasNotRunYet(): void
    {
        $test = new TestWithDifferentStatuses();

        $this->assertSame(BaseTestRunner::STATUS_UNKNOWN, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasFailedReturnsTrueWhenTestHasFailed(): void
    {
        $test = new TestWithDifferentStatuses('testThatFails');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_FAILURE, $test->getStatus());
        $this->assertTrue($test->hasFailed());
    }

    public function testHasFailedReturnsTrueWhenTestHasErrored(): void
    {
        $test = new TestWithDifferentStatuses('testThatErrors');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_ERROR, $test->getStatus());
        $this->assertTrue($test->hasFailed());
    }

    public function testHasFailedReturnsFalseWhenTestHasPassed(): void
    {
        $test = new TestWithDifferentStatuses('testThatPasses');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_PASSED, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasFailedReturnsFalseWhenTestHasBeenMarkedAsIncomplete(): void
    {
        $test = new TestWithDifferentStatuses('testThatIsMarkedAsIncomplete');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_INCOMPLETE, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasFailedReturnsFalseWhenTestHasBeenMarkedAsRisky(): void
    {
        $test = new TestWithDifferentStatuses('testThatIsMarkedAsRisky');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_RISKY, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasFailedReturnsFalseWhenTestHasBeenMarkedAsSkipped(): void
    {
        $test = new TestWithDifferentStatuses('testThatIsMarkedAsSkipped');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_SKIPPED, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasFailedReturnsFalseWhenTestHasEmittedWarning(): void
    {
        $test = new TestWithDifferentStatuses('testThatAddsAWarning');

        $test->run();

        $this->assertSame(BaseTestRunner::STATUS_WARNING, $test->getStatus());
        $this->assertFalse($test->hasFailed());
    }

    public function testHasOutputReturnsFalseWhenTestDoesNotGenerateOutput(): void
    {
        $test = new TestWithDifferentOutput('testThatDoesNotGenerateOutput');

        $test->run();

        $this->assertFalse($test->hasOutput());
    }

    public function testHasOutputReturnsFalseWhenTestExpectsOutputRegex(): void
    {
        $test = new TestWithDifferentOutput('testThatExpectsOutputRegex');

        $test->run();

        $this->assertFalse($test->hasOutput());
    }

    public function testHasOutputReturnsFalseWhenTestExpectsOutputString(): void
    {
        $test = new TestWithDifferentOutput('testThatExpectsOutputString');

        $test->run();

        $this->assertFalse($test->hasOutput());
    }

    public function testHasOutputReturnsTrueWhenTestGeneratesOutput(): void
    {
        $test = new TestWithDifferentOutput('testThatGeneratesOutput');

        $test->run();

        $this->assertTrue($test->hasOutput());
    }

    public function testDeprecationCanBeExpected(): void
    {
        $this->expectDeprecation();
        $this->expectDeprecationMessage('foo');
        $this->expectDeprecationMessageMatches('/foo/');

        trigger_error('foo', E_USER_DEPRECATED);
    }

    public function testNoticeCanBeExpected(): void
    {
        $this->expectNotice();
        $this->expectNoticeMessage('foo');
        $this->expectNoticeMessageMatches('/foo/');

        trigger_error('foo', E_USER_NOTICE);
    }

    public function testWarningCanBeExpected(): void
    {
        $this->expectWarning();
        $this->expectWarningMessage('foo');
        $this->expectWarningMessageMatches('/foo/');

        trigger_error('foo', E_USER_WARNING);
    }

    public function testErrorCanBeExpected(): void
    {
        $this->expectError();
        $this->expectErrorMessage('foo');
        $this->expectErrorMessageMatches('/foo/');

        trigger_error('foo', E_USER_ERROR);
    }

    public function testSetDependencyInput(): void
    {
        $test = new DependencyInputTest('testDependencyInputAsParameter');
        $test->setDependencyInput(['value from TestCaseTest']);

        $result = $test->run();

        $this->assertEquals(BaseTestRunner::STATUS_PASSED, $test->getStatus());
        $this->assertEquals(0, $result->errorCount());
        $this->assertEquals(0, $result->failureCount());
        $this->assertEquals(0, $result->skippedCount());
        $this->assertCount(1, $result);
    }

    /**
     * @return array<string, array>
     */
    private function getAutoreferencedArray()
    {
        $recursionData   = [];
        $recursionData[] = &$recursionData;

        return [
            'RECURSION' => [
                'data' => $recursionData,
            ],
        ];
    }
}