package test.utils.lang;

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

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import com.firefly.utils.lang.TypeUtils;
import com.firefly.utils.lang.Utf8Appendable.NotUtf8Exception;
import com.firefly.utils.lang.Utf8StringBuilder;

/**
 * Test various invalid UTF8 byte sequences.
 */
@RunWith(Parameterized.class)
public class Utf8StringBuilderInvalidUtfTest {
	@Parameters
	public static Collection<Object[]> data() {
		List<Object[]> data = new ArrayList<>();
		data.add(new String[] { "c0af" });
		data.add(new String[] { "EDA080" });
		data.add(new String[] { "f08080af" });
		data.add(new String[] { "f8808080af" });
		data.add(new String[] { "e080af" });
		data.add(new String[] { "F4908080" });
		data.add(new String[] { "fbbfbfbfbf" });
		data.add(new String[] { "10FFFF" });
		data.add(new String[] { "CeBaE1BdB9Cf83CeBcCeB5EdA080656469746564" });
		// use of UTF-16 High Surrogates (in codepoint form)
		data.add(new String[] { "da07" });
		data.add(new String[] { "d807" });
		// decoded UTF-16 High Surrogate "\ud807" (in UTF-8 form)

		data.add(new String[] { "EDA087" });
		return data;
	}

	private byte[] bytes;

	public Utf8StringBuilderInvalidUtfTest(String rawhex) {
		bytes = TypeUtils.fromHexString(rawhex);
		System.out.printf("Utf8StringBuilderInvalidUtfTest[] (%s)%n", TypeUtils.toHexString(bytes));
	}

	@Test(expected = NotUtf8Exception.class)
	public void testInvalidUTF8() {
		Utf8StringBuilder buffer = new Utf8StringBuilder();
		buffer.append(bytes, 0, bytes.length);
	}
}