pdfbox-trunk/preflight/src/test/java/org/apache/pdfbox/preflight/TestInvalidDirectory.java
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package org.apache.pdfbox.preflight;

import static org.junit.jupiter.api.Assertions.assertFalse;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.pdfbox.preflight.parser.PreflightParser;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

class TestInvalidDirectory
{
    @ParameterizedTest
    @MethodSource("initializeParameters")
    void validate(File target) throws Exception
    {
        if (target != null)
        {
            System.out.println(target);
            ValidationResult result = PreflightParser.validate(target);
            assertFalse(result.isValid(), "Test of " + target);
        }
    }

    public static Collection<File> initializeParameters() throws Exception
    {
        // check directory
        File directory = null;
        String pdfPath = System.getProperty("pdfa.invalid", null);
        if ("${user.pdfa.invalid}".equals(pdfPath))
        {
            pdfPath = null;
        }
        if (pdfPath != null)
        {
            directory = new File(pdfPath);
            if (!directory.exists())
                throw new Exception("directory does not exists : " + directory.getAbsolutePath());
            if (!directory.isDirectory())
                throw new Exception("not a directory : " + directory.getAbsolutePath());
        }
        else
        {
            System.err.println("System property 'pdfa.invalid' not defined, will not run TestValidaDirectory");
        }
        // create list
        if (directory == null)
        {
            // add null to signal that test can be skipped
            // needed for parameterized test as an empty list 
            // will lead to a PreconditionViolation
            List<File> data = new ArrayList<>(1);
            data.add(null);
            return data;
        }
        else
        {
            File[] files = directory.listFiles();
            List<File> data = new ArrayList<>(files.length);
            for (File file : files)
            {
                if (file.isFile())
                {
                    data.add(file);
                }
            }
            return data;
        }
    }
}
