tasks2/KonwersjaLiter2/src/test/java/pl/dmcs/FileConverterTest.java

package pl.dmcs;
import org.testng.annotations.Test;
import static org.junit.jupiter.api.Assertions.*;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.List;

public class FileConverterTest {

    @Test
    void testConvertToUpperCase() throws IOException {
        Path filePath = Paths.get("src/main/resources/test.txt");
        String originalContent = Files.readString(filePath);
        String expectedContent ="TEST\n" +
                "PRZYKLADOWY TEKST MALYMI LITERAMI\n" +
                "12345\n" +
                "ABCDEF\n";

        FileConverter converter = new FileConverter();
        converter.convertToUpperCase(filePath.toString());

        String actualContent = Files.readString(filePath);

        expectedContent = expectedContent.replace("\r\n", "\n");
        actualContent = actualContent.replace("\r\n", "\n");

        assertEquals(expectedContent, actualContent);

        //  Files.writeString(filePath, originalContent);
    }

    // test na pusty plik
    @Test
    void testConvertEmpty() throws IOException{
        Path emptyFilePath = Paths.get("src/main/resources/empty.txt");
        Files.createFile(emptyFilePath); // twrorzy plik

        FileConverter converter = new FileConverter();
        converter.convertToUpperCase(emptyFilePath.toString());

        String actualContent = Files.readString(emptyFilePath);

        assertEquals("",actualContent);

        Files.deleteIfExists(emptyFilePath); // usuwa plik

    }

    // Kilka plików z jednakową zawartością
    @Test
    void testConvertManyFilesToUpperCase() throws IOException {
        List<Path> testFiles = Arrays.asList(
                Paths.get("src/main/resources/testFile1.txt"),
                Paths.get("src/main/resources/testFile2.txt"),
                Paths.get("src/main/resources/testFile3.txt")
        );

        for (Path filePath : testFiles) {
            Files.writeString(filePath, "To plik testowy"); //Pamietać
        }

        FileConverter converter = new FileConverter();

        for (Path filePath : testFiles) {
            converter.convertToUpperCase(filePath.toString());

            String actualContent = Files.readString(filePath);
            actualContent = actualContent.replace("\r\n", "\n");
            String expectedContent = "TO PLIK TESTOWY\n";

            assertEquals(expectedContent, actualContent);

            Files.deleteIfExists(filePath);
        }

    }



}