dirConventer

8/src/main/java/pl/weeia/DirConverter.java

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+package pl.weeia;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.stream.Stream;
+
+public class DirConverter {
+    public void convertFilesInDirectoryToUpperCase(String dirPath, String fileExtension) throws IOException {
+        Path dir = Paths.get(dirPath);
+        if (!Files.isDirectory(dir)) {
+            throw new IllegalArgumentException("Podana ścieżka nie jest katalogiem: " + dirPath);
+        }
+
+        try (Stream<Path> files = Files.walk(dir)) {
+            files.filter(Files::isRegularFile)
+                 .filter(file -> file.toString().endsWith(fileExtension))
+                 .forEach(file -> {
+                     try {
+                         new FileConverter().convertFileToUpperCase(file.toString());
+                     } catch (IOException e) {
+                         System.err.println("Błąd podczas konwersji pliku: " + file);
+                     }
+                 });
+        }
+    }
+}

8/src/test/java/DirConverterTest.java

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+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import pl.weeia.DirConverter;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class DirConverterTest {
+    private final DirConverter dirConverter = new DirConverter();
+    private Path tempDir;
+
+    @BeforeEach
+    public void setUp() throws IOException {
+        tempDir = Files.createTempDirectory("testDir");
+        Files.writeString(Files.createFile(tempDir.resolve("file1.txt")), "abc123");
+        Files.writeString(Files.createFile(tempDir.resolve("file2.txt")), "xyz789");
+        Files.createFile(tempDir.resolve("file3.log")); // Plik innego rozszerzenia
+    }
+
+    @AfterEach
+    public void tearDown() throws IOException {
+        Files.walk(tempDir)
+             .sorted((a, b) -> b.compareTo(a)) // Usuwanie w odwrotnej kolejności
+             .forEach(path -> {
+                 try {
+                     Files.deleteIfExists(path);
+                 } catch (IOException e) {
+                     System.err.println("Błąd usuwania pliku: " + path);
+                 }
+             });
+    }
+
+    @Test
+    public void testConvertFilesInDirectoryToUpperCase() throws IOException {
+        dirConverter.convertFilesInDirectoryToUpperCase(tempDir.toString(), ".txt");
+
+        String content1 = Files.readString(tempDir.resolve("file1.txt"));
+        String content2 = Files.readString(tempDir.resolve("file2.txt"));
+        String content3 = Files.readString(tempDir.resolve("file3.log"));
+
+        assertEquals("ABC123", content1);
+        assertEquals("XYZ789", content2);
+        assertEquals("file3.log", tempDir.resolve("file3.log").getFileName().toString());
+    }
+
+    @Test
+    public void testConvertFilesInNonExistentDirectory() {
+        assertThrows(IllegalArgumentException.class, () ->
+                dirConverter.convertFilesInDirectoryToUpperCase("non_existent_dir", ".txt"));
+    }
+}