Try deleting a missing file.

File

modules/simpletest/tests/file.test, line 1428
This provides SimpleTests for the core file handling functionality. These include FileValidateTest and FileSaveTest.

Class

FileUnmanagedDeleteTest
Deletion related tests.

Code

function testMissing() {

  // Try to delete a non-existing file
  $this
    ->assertTrue(file_unmanaged_delete(file_default_scheme() . '/' . $this
    ->randomName()), 'Returns true when deleting a non-existent file.');
}