function StreamWrapperTest::testFileFunctions

Tests some file handle functions.

File

core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php, line 114

Class

StreamWrapperTest

Tests stream wrapper functions.

Namespace

Code

public function testFileFunctions() : void {
    $filename = 'public://' . $this->randomMachineName();
    file_put_contents($filename, str_repeat('d', 1000));
    // Open for rw and place pointer at beginning of file so select will return.
    $handle = fopen($filename, 'c+');
    $this->assertNotFalse($handle, 'Able to open a file for appending, reading and writing.');
    // Attempt to change options on the file stream: should all fail.
    $this->assertFalse(@stream_set_blocking($handle, FALSE), 'Unable to set to non blocking using a local stream wrapper.');
    $this->assertFalse(@stream_set_blocking($handle, TRUE), 'Unable to set to blocking using a local stream wrapper.');
    $this->assertFalse(@stream_set_timeout($handle, 1), 'Unable to set read time out using a local stream wrapper.');
    $this->assertEquals(-1, @stream_set_write_buffer($handle, 512), 'Unable to set write buffer using a local stream wrapper.');
    // This will test stream_cast().
    $read = [
        $handle,
    ];
    $write = NULL;
    $except = NULL;
    $this->assertEquals(1, stream_select($read, $write, $except, 0), 'Able to cast a stream via stream_select.');
    // This will test stream_truncate().
    $this->assertEquals(1, ftruncate($handle, 0), 'Able to truncate a stream via ftruncate().');
    fclose($handle);
    $this->assertEquals(0, filesize($filename), 'Able to truncate a stream.');
    // Cleanup.
    unlink($filename);
}